Changes for page LSS Communication Protocol
Last modified by Eric Nantel on 2025/06/06 07:47
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... ... @@ -1,1 +1,1 @@ 1 - lynxmotion-smart-servo.WebHome1 +Main.WebHome - Tags
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... ... @@ -1,23 +1,12 @@ 1 -(% class="wikigeneratedid" id="HTableofContents" %) 2 -**Page Contents** 1 +The Lynxmotion Smart Servo (LSS) protocol was created in order to be as simple and straightforward as possible from a user perspective, while at the same time trying to stay compact and robust yet highly versatile. Almost everything one might expect to be able to configure for a smart servo motor is available. 3 3 4 - {{tocdepth="3"/}}3 +=== Session === 5 5 6 -= Serial Protocol = 7 - 8 -The custom Lynxmotion Smart Servo (LSS) serial protocol was created in order to be as simple and straightforward as possible from a user perspective ("human readable format"), while at the same time compact and robust yet highly versatile. The protocol was based on Lynxmotion's SSC-32 RC servo controller and almost everything one might expect to be able to configure for a smart servo motor is available. 9 - 10 -In order to have servos react differently when commands are sent to all servos in a serial bus, the first step a user should take is to assign a different ID number to each servo (explained below). Once this has been done, only the servo(s) which have been assigned to the ID sent as part of the command will follow that command. There is currently no CRC / checksum implemented as part of the protocol. 11 - 12 -== Session == 13 - 14 14 A "session" is defined as the time between when the servo is powered ON to when it is powered OFF or reset. 15 15 16 -Note that for a given session, the action related to a specific commands overrides the stored value in EEPROM. 17 - 18 18 == Action Commands == 19 19 20 -Action commands tell the servo, within that session, to do something (i.e. "take an action"). The types of action commands which can be sent aredescribed below, andthey cannotbe combined with other commandssuch as queries or configurations. Only one action command can be sent at a time. Action commands are session-specific, therefore once a servo is power cycled, it will not have any"memory" of previous actionsor virtual positions (described below on this page). Actioncommandsaresent serially to the servo's Rx pin and must be sent in the following format:9 +Action commands are sent serially to the servo's Rx pin and must be set in the following format: 21 21 22 22 1. Start with a number sign # (U+0023) 23 23 1. Servo ID number as an integer ... ... @@ -28,12 +28,16 @@ 28 28 ((( 29 29 Ex: #5PD1443<cr> 30 30 31 - This sends a serial command to all servo's Rx pins which areconnected to the busand only servo(s)with ID #5will movetoin tenthsofdegrees ("PD") of144.3 degrees.Any servo on the bus which does not have ID 5 will take no action when receiving this command.20 +Move servo with ID #5 to a position of 144.3 degrees. 32 32 33 - ==ActionModifiers==22 +Action commands cannot be combined with query commands, and only one action command can be sent at a time. 34 34 35 - Onlytwo commandscan beused asactionmodifiers: Timed Move(T) and Speed(S)describedbelow.Actionmodifiers can onlybeusedwithcertain actioncommands.Theformat to includeamodifieris:24 +Action commands are session-specific, therefore once a servo is power cycled, it will not have any "memory" of previous actions or virtual positions (as described at the bottom of this page). 36 36 26 +=== Action Modifiers === 27 + 28 +Two commands can be used as action modifiers only: Timed Move and Speed. The format is: 29 + 37 37 1. Start with a number sign # (U+0023) 38 38 1. Servo ID number as an integer 39 39 1. Action command (one to three letters, no spaces, capital or lower case) ... ... @@ -44,12 +44,14 @@ 44 44 45 45 Ex: #5P1456T1263<cr> 46 46 47 -This results in the servo with ID #5 rotating from the current angular position to a pulse position ("P") of 1456 in a time ("T") of 1263 milliseconds. 40 +Results in the servo rotating from the current angular position to a pulse position of 1456 in 1263 milliseconds. 41 + 42 +Modified commands are command specific. 48 48 ))) 49 49 50 50 == Query Commands == 51 51 52 -Query commands request information from the servo. They are received via the Rx pinoftheservo,and the servo's replyis sentviathe servo'sTx pin.Using separate lines for Tx andRx is called "full duplex". Query commandsarealso similartoactionand configuration commands and must use the following format:47 +Query commands are sent serially to the servo's Rx pin and must be set in the following format: 53 53 54 54 1. Start with a number sign # (U+0023) 55 55 1. Servo ID number as an integer ... ... @@ -61,25 +61,24 @@ 61 61 ))) 62 62 63 63 ((( 64 -The query will return a serialstring (almost instantaneously)via theservo'sTx pin with the following format:59 +The query will return a value via the Tx pin with the following format: 65 65 66 -1. Start with an asterisk *(U+002A)61 +1. Start with an asterisk (U+002A) 67 67 1. Servo ID number as an integer 68 68 1. Query command (one to three letters, no spaces, capital letters) 69 69 1. The reported value in the units described, no decimals. 70 70 1. End with a control / carriage return '<cr>' 71 71 72 -There is currently no option to control how fast a servo replies after it has received a query command, therefore when sending a query command to the bus, the controller should be prepared to immediately "listen" for and parse the reply. Sending multiple queries on a bus in fast succession may result in replies overlapping and giving incorrect or corrupt data. As such, the controller should receive a reply before sending a new command. A reply to the query sent above might be: 73 - 74 74 ((( 75 75 Ex: *5QD1443<cr> 76 76 ))) 77 77 78 -This indicates that servo #5 is currently at 144.3 degrees (1443 tenths of degrees). 71 +Indicates that servo #5 is currently at 144.3 degrees. 72 +))) 79 79 80 80 == Configuration Commands == 81 81 82 -Configuration commands a nd corresponding values affectaservo'sdefaults which are writtenoand read from theservo'sEEPROM. These configurationsare retainedinmemoryafter the servois resetorpower iscut / lost.Someconfiguration commands affectthe session,while others donot.Inthe Commandtablebelow,the column "Session"denotesif theconfigurationcommand affects the session..Not all action commands have a corresponding configurationcommandandvice versa.Moreinformationabout which configurationcommands are retained when inlynxmotion-smart-servo.lss-radio-control-pwm.WebHome]].Configuration commands are not cumulative, in that if two configurations are sent, one after the next, only the last configuration is used and stored. The format to send a configuration command is identical to that of an action command:76 +Configuration commands affect the servo's current session* but unlike action commands, configuration commands are written to EEPROM and are retained even if the servo loses power (therefore NOT session specific). Not all action commands have a corresponding configuration and vice versa. Certain configurations are retained for when the servo is used in RC model. More information can be found on the [[LSS - RC PWM page>>doc:Lynxmotion Smart Servos (LSS).LSS - RC PWM.WebHome]]. 83 83 84 84 1. Start with a number sign # (U+0023) 85 85 1. Servo ID number as an integer ... ... @@ -89,162 +89,88 @@ 89 89 90 90 Ex: #5CO-50<cr> 91 91 92 - Thisconfigures an absolute origin offset("CO")with respect to factory originwith ID#5 and changes the offset for that session to -5.0 degrees(50 tenths of degrees).Once the servo is powered off and then powered on, zeroing the servo will cause it to move to -5.0 degrees with respect to the factory origin and report its position as 0 degrees. Configuration commands can be undone / reset either by sending the servo's default value for that configuration, or by doing a factory reset (clears all configurations) described below.86 +Assigns an absolute origin offset of -5.0 degrees (with respect to factory origin) to servo #5 and changes the offset for that session to -5.0 degrees. 93 93 94 - **SessionvsConfigurationQuery**88 +Configuration commands are not cumulative, in that if two configurations are sent at any time, only the last configuration is used and stored. 95 95 96 - By default,thequerycommandreturns thesessions' value. Shouldnoactioncommandshavebeensent to changehesessionvalue, it willreturn the valuesavedin EEPROM which will eitherbe theservo'sdefault,ormodifiedwitha configurationcommand. In orderto querythevaluestored in EEPROM (configuration),adda '1' tothequerycommand:90 +*Important Note: the one exception is the baud rate - the servo's current session retains the given baud rate. The new baud rate will only be in place when the servo is power cycled. 97 97 98 -Ex: #5CSR20<cr> immediately sets the maximum speed for servo #5 to 20rpm (explained below) and changes the value in memory. 99 - 100 -After RESET, a command of #5SR4<cr> sets the session's speed to 4rpm, but does not change the configuration value in memory. Therefore: 101 - 102 -#5QSR<cr> would return *5QSR4<cr> which represents the value for that session, whereas 103 - 104 -#5QSR1<cr> would return *5QSR20<cr> which represents the value in EEPROM 105 - 106 -== Virtual Angular Position == 107 - 108 -The ability to store a "virtual angular position" is a feature which allows for rotation beyond 360 degrees, permitting multiple rotations of the output horn, moving the center position and more. In virtual position mode, the "absolute position" would be the angle of the output shaft with respect to a 360.0 degree circle, and can be obtained by taking the modulus (with respect to 360 degrees) of the value. For example if the virtual position is reported as 15335 (or 1533.5 degrees), taking the modulus would give 93.5 degrees (3600 * 4 + 935 = 15335) as the absolute position (assuming no origin offset). 109 - 110 -[[image:LSS-servo-positions.jpg]] 111 - 112 -In this example, the gyre direction (explained below, a.k.a. "rotation direction") is positive (clockwise), and origin offset has not been modified. Each square represents 30 degrees. The following command is sent: 113 - 114 -#1D-300<cr> This causes the servo to move to -30.0 degrees (green arrow) 115 - 116 -#1D2100<cr> This second position command is sent to the servo, which moves it to 210.0 degrees (orange arrow) 117 - 118 -#1D-4200<cr> This next command rotates the servo counterclockwise to a position of -420 degrees (red arrow), which means one full rotation of 360 degrees plus 60.0 degrees (420.0 - 360.0), with a virtual position of -420.0 degrees. 119 - 120 -Although the final physical position would be the same as if the servo were commanded to move to -60.0 degrees, the servo is in fact at -420.0 degrees. 121 - 122 -#1D4800<cr> This new command is sent which would then cause the servo to rotate from -420.0 degrees to 480.0 degrees (blue arrow), which would be a total of 900 degrees of clockwise rotation, or 2.5 complete rotations. 123 - 124 -#1D3300<cr> would cause the servo to rotate from 480.0 degrees to 330.0 degrees (yellow arrow). 125 - 126 -If / once the servo loses power or is power cycled, it also loses the virtual position associated with that session. For example, if the virtual position was 480.0 degrees before power is cycled, upon power up the servo's position will be read as +120.0 degrees from zero (assuming center position has not been modified). 127 -))) 128 - 129 129 = Command List = 130 130 131 -== Regular == 94 +|= #|=Description|= Action|= Query|= Config|= RC|= Serial|= Units|= Notes 95 +| 1|**L**imp| L| | | | ✓| none| 96 +| 2|**H**alt & Hold| H| | | | ✓| none| 97 +| 3|**T**imed move| T| | | | ✓| milliseconds| Modifier only 98 +| 4|**S**peed| S| | | | ✓| microseconds / second| Modifier only 99 +| 5|**M**ove in **D**egrees (relative)| MD| | | | ✓| tenths of degrees (ex 325 = 32.5 degrees; 91 = 9.1 degrees)| 100 +| 6|**O**rigin Offset| O| QO| CO| ✓| ✓| tenths of degrees (ex 325 = 32.5 degrees; 91 = 9.1 degrees)| 101 +| 7|**A**ngular **R**ange| AR| QAR| CAR| ✓| ✓| tenths of degrees (ex 325 = 32.5 degrees; 91 = 9.1 degrees)| 102 +| 8|Position in **P**ulse| P| QP| | | ✓| microseconds| 103 +| 9|Position in **D**egrees| D| QD| | | ✓| tenths of degrees (ex 325 = 32.5 degrees; 91 = 9.1 degrees)| 104 +| 10|**W**heel mode in **D**egrees| WD| QWD| | | ✓| tenths of degrees per second (ex 248 = 24.8 degrees per second)| 105 +| 11|**W**heel mode in **R**PM| WR| QWR| | | ✓| rpm| 106 +| 12|**S**peed in **D**egrees| SD| QSD| CSD| ✓| ✓| tenths of degrees per second (ex 248 = 24.8 degrees per second)| 107 +| 13|**S**peed in **R**PM| SR| QSR| CSR| ✓| ✓| rpm| 108 +| 14|**A**ngular **A**cceleration| AA| QAA| CAA| ✓| ✓| tenths of degrees per second squared| 109 +| 15|**A**ngular **D**eceleration| AD| QAD| CAD| ✓| ✓| tenths of degrees per second squared| 110 +| 16|**LED** Color| LED| QLED| CLED| ✓| ✓| none (integer from 1 to 8)|0=OFF 1=RED 2=GREEN 3= BLUE 4=YELLOW 5=CYAN 6= 7=MAGENTA, 8=WHITE 111 +| 17|**ID** #| ID| QID| CID| | ✓| none (integer from 0 to 250)|Note: ID 254 is a "broadcast" which all servos respond to. 112 +| 18|**B**aud rate| B| QB| CB| | ✓| none (integer)| 113 +| 19|**G**yre direction (**G**)| G| QG| CG| ✓| ✓| none | Gyre / rotation direction where 1= CW (clockwise) -1 = CCW (counter-clockwise) 114 +| 20|**F**irst Position (**P**ulse)| | QFP|CFP | ✓| ✓| none | 115 +| 21|**F**irst Position (**D**egrees)| | QFD|CFD| ✓| ✓| none | 116 +| 22|**T**arget (**D**egree) **P**osition| | QDT| | | ✓| tenths of degrees (ex 325 = 32.5 degrees; 91 = 9.1 degrees)| 117 +| 23|**M**odel| | QM| | | | none (integer)| 118 +| 24|Serial **N**umber| | QN| | | | none (integer)| 119 +| 25|**F**irmware version| | QF| | | | none (integer)| 120 +| 26|**Q**uery (general status)| | Q| | | ✓| none (integer from 1 to 8)| 121 +| 27|**V**oltage| | QV| | | ✓| tenths of volt (ex 113 = 11.3V; 92 = 9.2V)| 122 +| 28|**T**emperature| | QT| | | ✓| degrees Celsius| 123 +| 29|**C**urrent| | QC| | | ✓| tenths of Amps (ex 2 = 0.2A)| 124 +| | | | | | | | | 125 +| | | | | | | | | 132 132 133 -|= #|=Description|= Action|= Query|= Config|=Session|= RC|= Serial|= Units|=(% style="width: 510px;" %) Notes|=(% style="width: 113px;" %)Default Value 134 -| 1|[[**L**imp>>||anchor="H1.Limp28L29"]]| L| | | | | ✓|none|(% style="width:510px" %) |(% style="text-align:center; width:113px" %) 135 -| 2|[[**H**alt & **H**old>>||anchor="H2.Halt26Hold28H29"]]| H| | | | | ✓|none|(% style="width:510px" %) |(% style="text-align:center; width:113px" %) 136 -| 3|[[**T**imed move>>||anchor="H3.Timedmove28T29modifier"]]| | | | | | ✓|milliseconds|(% style="width:510px" %) Modifier only for {P, D, MD}. Time is estimated and can change based on load|(% style="text-align:center; width:113px" %) 137 -| 4|[[**S**peed>>||anchor="H4.Speed28S29modifier"]]| |QS| | | | ✓|microseconds per second|(% style="width:510px" %) Modifier only {P}|(% style="text-align:center; width:113px" %) 138 -| 5|[[**M**ove in **D**egrees (relative)>>||anchor="H5.28Relative29MoveinDegrees28MD29"]]| MD| | | | | ✓|tenths of degrees (ex 325 = 32.5 degrees)|(% style="width:510px" %) |(% style="text-align:center; width:113px" %) 139 -| 6|[[**O**rigin Offset>>||anchor="H6.OriginOffsetAction28O29"]]| O| QO|CO|✓| ✓| ✓|tenths of degrees (ex 91 = 9.1 degrees)|(% style="width:510px" %) |(% style="text-align:center; width:113px" %)((( 140 -0 141 -))) 142 -| 7|[[**A**ngular **R**ange>>||anchor="H7.AngularRange28AR29"]]| AR| QAR| CAR|✓| ✓| ✓|tenths of degrees |(% style="width:510px" %) |(% style="text-align:center; width:113px" %)((( 143 -1800 144 -))) 145 -| 8|[[Position in **P**ulse>>||anchor="H8.PositioninPulse28P29"]]| P| QP| | | | ✓|microseconds|(% style="width:510px" %)((( 146 -Inherited from SSC-32 serial protocol 147 -)))|(% style="text-align:center; width:113px" %) 148 -| 9|[[Position in **D**egrees>>||anchor="H9.PositioninDegrees28D29"]]| D| QD / QDT| | | | ✓|tenths of degrees |(% style="width:510px" %) |(% style="text-align:center; width:113px" %) 149 -| 10|[[**W**heel mode in **D**egrees>>||anchor="H10.WheelModeinDegrees28WD29"]]| WD| QWD| | | | ✓|tenths of degrees per second (ex 248 = 24.8 degrees per second)|(% style="width:510px" %)A.K.A. "Speed mode" or "Continuous rotation"|(% style="text-align:center; width:113px" %) 150 -| 11|[[**W**heel mode in **R**PM>>||anchor="H11.WheelModeinRPM28WR29"]]| WR| QWR| | | | ✓|revolutions per minute (rpm)|(% style="width:510px" %)A.K.A. "Speed mode" or "Continuous rotation"|(% style="text-align:center; width:113px" %) 151 -| 12|[[Max **S**peed in **D**egrees>>||anchor="H12.MaxSpeedinDegrees28SD29"]]| SD| QSD|CSD|✓| ✓| ✓|degrees per second (°/s)|(% style="width:510px" %)((( 152 -QSD: Add modifier "2" for instantaneous speed. 127 += Details = 153 153 154 -SD overwrites SR / CSD overwrites CSR and vice-versa. 155 -)))|(% style="text-align:center; width:113px" %)Max per servo 156 -| 13|[[Max **S**peed in **R**PM>>||anchor="H13.MaxSpeedinRPM28SR29"]]| SR| QSR|CSR|✓| ✓| ✓|revolutions per minute (rpm)|(% style="width:510px" %)((( 157 -QSR: Add modifier "2" for instantaneous speed 129 +__1. Limp (**L**)__ 158 158 159 -SR overwrites SD / CSR overwrites CSD and vice-versa. 160 -)))|(% style="text-align:center; width:113px" %)Max per servo 161 -| 14|[[**LED** Color>>||anchor="H14.LEDColor28LED29"]]| LED| QLED| CLED|✓| ✓| ✓|none (integer from 0 to 8)|(% style="width:510px" %)0=Off (black); 1=Red 2=Green; 3=Blue; 4=Yellow; 5=Cyan; 6=Magenta; 7=White;|(% style="text-align:center; width:113px" %)0 (OFF) 162 -| 15|[[**G**yre direction (**G**)>>||anchor="H15.GyreRotationDirection28G29"]]| G| QG| CG|✓| ✓| ✓|none |(% style="width:510px" %)Gyre / rotation direction: 1= CW (clockwise) -1 = CCW (counter-clockwise)|(% style="text-align:center; width:113px" %)1 163 -| 16|[[**ID** #>>||anchor="H16.IdentificationNumber28ID29"]]| | QID| CID| | | ✓|none (integer from 0 to 250)|(% style="width:510px" %)Note: ID 254 is a "broadcast" which all servos respond to. |(% style="text-align:center; width:113px" %)0 164 -| 17|[[**B**aud rate>>||anchor="H17.BaudRate"]]| | QB| CB| | | ✓|none (integer)|(% style="width:510px" %) |(% style="text-align:center; width:113px" %)115200 165 -| 18|//{coming soon}//| | | | | | | |(% style="width:510px" %) |(% style="text-align:center; width:113px" %)((( 166 - 167 -))) 168 -| 19|[[**F**irst Position (**D**eg)>>||anchor="H19.FirstA0Position28Degrees29"]]| | QFD|CFD|X| ✓| ✓|none |(% style="width:510px" %) |(% style="text-align:center; width:113px" %)No Value 169 -| 20|[[**M**odel **S**tring>>||anchor="H20.QueryModelString28QMS29"]]| | QMS| | | | |none (string)|(% style="width:510px" %) Returns the type of servo (ST, HS, HT)|(% style="text-align:center; width:113px" %) 170 -| 21|[[Serial **N**umber>>||anchor="H21.QuerySerialNumber28QN29"]]| | QN| | | | |none (integer)|(% style="width:510px" %) Returns the unique serial number for that servo|(% style="text-align:center; width:113px" %) 171 -| 22|[[**F**irmware version>>||anchor="H22.QueryFirmware28QF29"]]| | QF| | | | |none (integer)|(% style="width:510px" %) |(% style="text-align:center; width:113px" %) 172 -| 23|[[**Q**uery (gen. status)>>||anchor="H23.QueryStatus28Q29"]]| | Q| | | | ✓|none (integer from 1 to 8)|(% style="width:510px" %) See command description for details|(% style="text-align:center; width:113px" %) 173 -| 24|[[**V**oltage>>||anchor="H24.QueryVoltage28QV29"]]| | QV| | | | ✓|millivolts (ex 5936 = 5936mV = 5.936V)|(% style="width:510px" %) |(% style="text-align:center; width:113px" %) 174 -| 25|[[**T**emperature>>||anchor="H25.QueryTemperature28QT29"]]| | QT| | | | ✓|tenths of degrees Celsius|(% style="width:510px" %)Max temp before error: 85°C (servo goes limp)|(% style="text-align:center; width:113px" %) 175 -| 26|[[**C**urrent>>||anchor="H26.QueryCurrent28QC29"]]| | QC| | | | ✓|milliamps (ex 200 = 0.2A)|(% style="width:510px" %) |(% style="text-align:center; width:113px" %) 176 -| 27|[[**C**hange to** RC**>>||anchor="H27.ConfigureRCMode28CRC29"]]| | |CRC|✓| | ✓|none|(% style="width:510px" %)((( 177 -Change to RC mode 1 (position) or 2 (wheel). 178 -)))|(% style="text-align:center; width:113px" %)Serial 179 -| 28|[[**RESET**>>||anchor="H28.RESET"]]| | | | | | ✓|none|(% style="width:510px" %)Soft reset. See command for details.|(% style="text-align:center; width:113px" %) 180 -| 29|[[**DEFAULT**>>||anchor="H29.DEFAULTA026CONFIRM"]]| | | | | |✓|none|(% style="width:510px" %)Revert to firmware default values. See command for details|(% style="text-align:center; width:113px" %) 181 -| 30|[[**UPDATE**>>||anchor="H30.UPDATEA026CONFIRM"]]| | | | | |✓|none|(% style="width:510px" %)Update firmware. See command for details.|(% style="text-align:center; width:113px" %) 182 - 183 -== Advanced == 184 - 185 -|= #|=(% style="width: 182px;" %)Description|=(% style="width: 56px;" %)Mod|=(% style="width: 70px;" %) Action|=(% style="width: 71px;" %) Query|=(% style="width: 77px;" %) Config|=(% style="width: 77px;" %)Session|=(% style="width: 56px;" %) RC|=(% style="width: 151px;" %) Serial|= Units|=(% style="width: 510px;" %) Notes 186 -| A1|(% style="width:182px" %)[[**A**ngular **S**tiffness>>||anchor="HA1.AngularStiffness28AS29"]]|(% style="width:56px" %) |(% style="width:70px" %)AS|(% style="width:71px" %)QAS|(% style="width:77px" %)CAS|(% style="width:77px" %)✓|(% style="width:56px" %) ✓|(% style="width:151px" %) ✓|none (integer -4 to +4)|(% style="width:510px" %)Suggested values are between 0 to +4 187 -| A2|(% style="width:182px" %)[[**A**ngular **H**olding Stiffness>>||anchor="HA2.AngularHoldingStiffness28AH29"]]|(% style="width:56px" %) |(% style="width:70px" %)AH|(% style="width:71px" %)QAH|(% style="width:77px" %)CAH|(% style="width:77px" %)✓|(% style="width:56px" %) |(% style="width:151px" %) ✓|none (integer -10 to +10)|(% style="width:510px" %)Effect is different between serial and RC 188 -| A3|(% style="width:182px" %)[[**A**ngular **A**cceleration>>||anchor="HA3:AngularAcceleration28AA29"]]|(% style="width:56px" %) |(% style="width:70px" %)AA|(% style="width:71px" %)QAA|(% style="width:77px" %)CAA|(% style="width:77px" %)✓|(% style="width:56px" %) |(% style="width:151px" %) ✓|degrees per second squared|(% style="width:510px" %)Increments of 10 degrees per second squared 189 -| A4|(% style="width:182px" %)[[**A**ngular **D**eceleration>>||anchor="HA4:AngularDeceleration28AD29"]]|(% style="width:56px" %) |(% style="width:70px" %)AD|(% style="width:71px" %)QAD|(% style="width:77px" %)CAD|(% style="width:77px" %)✓|(% style="width:56px" %) |(% style="width:151px" %) ✓|degrees per second squared|(% style="width:510px" %)Increments of 10 degrees per second squared 190 -| A5|(% style="width:182px" %)[[**E**nable **M**otion Control>>||anchor="HA5:MotionControl28EM29"]]|(% style="width:56px" %) |(% style="width:70px" %)EM|(% style="width:71px" %)QEM|(% style="width:77px" %) |(% style="width:77px" %) |(% style="width:56px" %) |(% style="width:151px" %) ✓|none|(% style="width:510px" %)EM0 to disable motion control, EM1 to enable 191 -| A6|(% style="width:182px" %)[[**C**onfigure **L**ED **B**linking>>||anchor="HA6.ConfigureLEDBlinking28CLB29"]]|(% style="width:56px" %) |(% style="width:70px" %) |(% style="width:71px" %)QLB|(% style="width:77px" %) CLB|(% style="width:77px" %) |(% style="width:56px" %) ✓|(% style="width:151px" %) ✓|none (integer from 0 to 63)|(% style="width:510px" %)((( 192 -0=No blinking, 63=Always blink; 193 - 194 -Blink while: 1=Limp; 2=Holding; 4=Accel; 8=Decel; 16=Free 32=Travel; 195 -))) 196 -| A7|(% style="width:182px" %)Current Halt & Hold|(% style="width:56px" %) |(% style="width:70px" %) |(% style="width:71px" %) |(% style="width:77px" %) |(% style="width:77px" %) |(% style="width:56px" %) |(% style="width:151px" %) | |(% style="width:510px" %) 197 -| A8|(% style="width:182px" %)Current Limp|(% style="width:56px" %) |(% style="width:70px" %) |(% style="width:71px" %) |(% style="width:77px" %) |(% style="width:77px" %) |(% style="width:56px" %) |(% style="width:151px" %) | |(% style="width:510px" %) 198 - 199 -== Details - Basic == 200 - 201 -====== __1. Limp (**L**)__ ====== 202 - 203 203 Example: #5L<cr> 204 204 205 205 This action causes the servo to go "limp". The microcontroller will still be powered, but the motor will not. As an emergency safety feature, should the robot not be doing what it is supposed to or risks damage, use the broadcast ID to set all servos limp #254L<cr>. 206 206 207 - ======__2. Halt & Hold (**H**)__======135 +__2. Halt & Hold (**H**)__ 208 208 209 209 Example: #5H<cr> 210 210 211 -This action overrides whatever the servo might be doing at the time the command is received (accelerating, moving continuously etc.) and causes it to stop immediately and hold that angularposition.139 +This action overrides whatever the servo might be doing at the time the command is received (accelerating, moving continuously etc.) and causes it to stop immediately and hold that position. 212 212 213 - ======__3. Timed move (**T**)modifier__======141 +__3. Timed move (**T**)__ 214 214 215 215 Example: #5P1500T2500<cr> 216 216 217 -Timed move can be used only as a modifier for a position (P , D, MD) actions. The units are in milliseconds, so a timed move of 2500 milliseconds would cause the servo to rotate from its current position to the desired position in 2.5 seconds. The onboard controller will attempt to ensurethat the move is performed entirely at the desired velocity, though differences in torquemay cause it to not be exact. This command is in place to ensure backwards compatibility with the SSC-32 / 32U protocol.145 +Timed move can be used only as a modifier for a position (P) action. The units are in milliseconds, so a timed move of 2500 milliseconds would cause the servo to rotate from its current position to the desired position in 2.5 seconds. This command is in place to ensure backwards compatibility with the SSC-32 / 32U protocol. 218 218 219 - Note:If the calculated speedat which a servo must rotate for a timed move is greater than its maximum speed(which depends on voltage and load), then it will move at its maximum speed, and the time of the move may be longer than requested.147 +__4. Speed (**S**)__ 220 220 221 -====== __4. Speed (**S**) modifier__ ====== 222 - 223 223 Example: #5P1500S750<cr> 224 224 225 225 This command is a modifier only for a position (P) action and determines the speed of the move in microseconds per second. A speed of 750 microseconds would cause the servo to rotate from its current position to the desired position at a speed of 750 microseconds per second. This command is in place to ensure backwards compatibility with the SSC-32 / 32U protocol. 226 226 227 - QuerySpeed(**QS**)153 +__5. (Relative) Move in Degrees (**MD**)__ 228 228 229 -Example: #5QS<cr> might return *5QS300<cr> 230 - 231 -This command queries the current speed in microseconds per second. 232 - 233 -====== __5. (Relative) Move in Degrees (**MD**)__ ====== 234 - 235 235 Example: #5MD123<cr> 236 236 237 237 The relative move command causes the servo to read its current position and move the specified number of tenths of degrees in the corresponding position. For example if the servo is set to rotate CW (default) and an MD command of 123 is sent to the servo, it will cause the servo to rotate clockwise by 12.3 degrees. Negative commands would cause the servo to rotate in the opposite configured direction. 238 238 239 - ======__6. Origin Offset Action (**O**)__======159 +__6. Origin Offset Action (**O**)__ 240 240 241 241 Example: #5O2400<cr> 242 242 243 -This command allows you to temporarily change the origin of the servo in relation to the factory zero position for that session.As withall action commands, the setting will be lost upon servo reset / power cycle. Origin offset commands are not cumulative and always relate to factory zero. In the first image, the origin at factory offset '0' (centered).163 +This command allows you to temporarily change the origin of the servo in relation to the factory zero position. The setting will be lost upon servo reset / power cycle. Origin offset commands are not cumulative and always relate to factory zero. Note that for a given session, the O command overrides the CO command. In the first image, the origin at factory offset '0' (centered). 244 244 245 245 [[image:LSS-servo-default.jpg]] 246 246 247 -In the second image, the origin, a ndthecorrespondingangular range (explained below) have been shifted by+240.0 degrees:167 +In the second image, the origina, as well as the angular range (explained below) have been shifted by 240.0 degrees: 248 248 249 249 [[image:LSS-servo-origin.jpg]] 250 250 ... ... @@ -252,54 +252,53 @@ 252 252 253 253 Example: #5QO<cr> Returns: *5QO-13 254 254 255 -This allows you to query the angle (in tenths of degrees) of the origin in relation to the factory zero position. In this example, the new origin is at -1.3 degrees from the factory zero.175 +This allows you to query the angle (in tenths of degrees) of the origin in relation to the factory zero position. 256 256 257 257 Configure Origin Offset (**CO**) 258 258 259 259 Example: #5CO-24<cr> 260 260 261 -This command allows you to change the origin of the servo in relation to the factory zero position in EEPROM. The setting will be saved upon servo reset / power cycle. Origin offset configuration commands are not cumulative and always relate to factory zero. The new origin is also used in RC mode. In the example, the new origin will be at -2.4 degrees from the factory zero.181 +This command allows you to change the origin of the servo in relation to the factory zero position in EEPROM. The setting will be saved upon servo reset / power cycle. Origin offset configuration commands are not cumulative and always relate to factory zero. The new origin is also used in RC mode. 262 262 263 - ======__7. Angular Range (**AR**)__======183 +__7. Angular Range (**AR**)__ 264 264 265 265 Example: #5AR1800<cr> 266 266 267 -This command allows you to temporarily change the total angular range of the servo in tenths of degrees. This applies to the Position in Pulse (P) command and RC mode. The default for (P) and RC mode is 1800 (180.0 degrees total, or ±90.0 degrees). The image belowshows a standard-180.0 to +180.0 range,with no offset:187 +This command allows you to temporarily change the total angular range of the servo in tenths of degrees. This applies to the Position in Pulse (P) command and RC mode. The default for (P) and RC mode is 1800 (180.0 degrees total, or ±90.0 degrees). In the first image, 268 268 269 269 [[image:LSS-servo-default.jpg]] 270 270 271 - Below, the angular rangeis restricted to 180.0 degrees, or -90.0 to +90.0. The center has remained unchanged.191 +Here, the angular range has been restricted to 180.0 degrees, or -90.0 to +90.0. The center has remained unchanged. 272 272 273 273 [[image:LSS-servo-ar.jpg]] 274 274 275 - Finally, the angular range action command (ex. #5AR1800<cr>) and origin offset action commandre used to move both the center and limit the angular range:195 +The angular range action command (ex. #5AR1800<cr>) and origin offset action command (ex. #5O-1200<cr>) an be used to move both the center and limit the angular range: 276 276 277 277 [[image:LSS-servo-ar-o-1.jpg]] 278 278 279 279 Query Angular Range (**QAR**) 280 280 281 -Example: #5QAR<cr> might return *5AR 1800, indicating the total angular range is 180.0 degrees.201 +Example: #5QAR<cr> might return *5AR2756 282 282 283 283 Configure Angular Range (**CAR**) 284 284 285 285 This command allows you to change the total angular range of the servo in tenths of degrees in EEPROM. The setting will be saved upon servo reset / power cycle. 286 286 287 - ======__8. Position in Pulse (**P**)__======207 +__8. Position in Pulse (**P**)__ 288 288 289 289 Example: #5P2334<cr> 290 290 291 -The position in PWM pulses was retained in order to be backward compatible with the SSC-32 / 32U protocol. This relates the desired angle with an RC standard PWM pulse and is further explained in the SSC-32 and SSC-32U manuals found on Lynxmotion.com. Without any modifications to configuration considered, and a ±90.0 degrees standard range where 1500 microseconds is centered, a pulse of 2334 would set the servo to 165.1 degrees . Valid values for P are [500, 2500]. Values outside this range are corrected / restricted to end points.211 +The position in PWM pulses was retained in order to be backward compatible with the SSC-32 / 32U protocol. This relates the desired angle with an RC standard PWM pulse and is further explained in the SSC-32 and SSC-32U manuals found on Lynxmotion.com. Without any modifications to configuration considered, and a ±90.0 degrees standard range where 1500 microseconds is centered, a pulse of 2334 would set the servo to 165.1 degrees 292 292 293 293 Query Position in Pulse (**QP**) 294 294 295 -Example: #5QP<cr> might return *5QP 2334215 +Example: #5QP<cr> might return *5QP 296 296 297 -This command queries the current angular position in PWM "units". The user must take into consideration that the response includes any angular range and origin configurations in order to determine the actual angle. 298 -Valid values for QP are {-500, [500, 2500], -2500}. Values outside the [500, 2500] range are given a negative corresponding end point value to indicate they are out of bounds (note that if the servo is physically located at one of the endpoints, it may return a negative number if it is a fraction of a degree beyond the position). 217 +This command queries the current angular position in PWM "units". The user must take into consideration that the response includes any angular range and origin configurations in order to determine the actual angle. 299 299 300 - ======__9. Position in Degrees (**D**)__======219 +__9. Position in Degrees (**D**)__ 301 301 302 -Example: #5D1456<cr> 221 +Example: #5PD1456<cr> 303 303 304 304 This moves the servo to an angle of 145.6 degrees, where the center (0) position is centered. Negative values (ex. -176 representing -17.6 degrees) are used. A full circle would be from -1800 to 1800 degrees. A value of 2700 would be the same angle as -900, except the servo would move in a different direction. 305 305 ... ... @@ -307,19 +307,10 @@ 307 307 308 308 Query Position in Degrees (**QD**) 309 309 310 -Example: #5QD<cr> might return *5QD 132<cr>229 +Example: #5QD<cr> might return *5QD0<cr> 311 311 312 - Thismeans theservo islocatedat13.2 degrees.231 +__10. Wheel Mode in Degrees (**WD**)__ 313 313 314 -(% class="wikigeneratedid" id="H22.QueryTargetPositioninDegrees28QDT29" %) 315 -Query Target Position in Degrees (**QDT**) 316 - 317 -Ex: #5QDT<cr> might return *5QDT6783<cr> 318 - 319 -The query target position command returns the target angle during and after an action which results in a rotation of the servo horn. In the example above, the servo is rotating to a virtual position of 678.3 degrees. Should the servo not have a target position or be in wheel mode, it will respond without a number (Ex: *5QDT<cr>). 320 - 321 -====== __10. Wheel Mode in Degrees (**WD**)__ ====== 322 - 323 323 Ex: #5WD900<cr> 324 324 325 325 This command sets the servo to wheel mode where it will rotate in the desired direction at the selected speed. The example above would have the servo rotate at 90.0 degrees per second clockwise (assuming factory default configurations). ... ... @@ -330,7 +330,7 @@ 330 330 331 331 The servo replies with the angular speed in tenths of degrees per second. A negative sign would indicate the opposite direction (for factory default a negative value would be counter clockwise). 332 332 333 - ======__11. Wheel Mode in RPM (**WR**)__======243 +__11. Wheel Mode in RPM (**WR**)__ 334 334 335 335 Ex: #5WR40<cr> 336 336 ... ... @@ -342,25 +342,18 @@ 342 342 343 343 The servo replies with the angular speed in rpm. A negative sign would indicate the opposite direction (for factory default a negative value would be counter clockwise). 344 344 345 - ======__12.MaxSpeed in Degrees (**SD**)__======255 +__12. Speed in Degrees (**SD**)__ 346 346 347 347 Ex: #5SD1800<cr> 348 348 349 -This command sets the servo's maximum speed for motion commands in tenths of degrees per second for that session. In the example above, the servo's maximum speed for that session would be set to 180.0 degrees per second. The servo's maximum speed cannot be set higher than its physical limit at a given voltage.TheSDaction command overrides CSD (described below) for that session. Upon reset or power cycle, the servo reverts to the value associated with CSD as described below. Note that SD and SR (described below) are effectively the same, but allow the user to specify the speed in either unit. The last command (either SR or SD)received is what the servo uses for that session.259 +This command sets the servo's maximum speed for action commands in tenths of degrees per second for that session. In the example above, the servo's maximum speed for that session would be set to 180.0 degrees per second. Therefore maximum speed for actions can be set "on the fly". The servo's maximum speed cannot be set higher than its physical limit at a given voltage. SD overrides CSD (described below) for that session. Upon reset or power cycle, the servo reverts to the value associated with CSD as described below. Note that SD and SR (described below) are effectively the same, but allow the user to specify the speed in either unit. The last command (either SR or SD) is what the servo uses for that session. 350 350 351 351 Query Speed in Degrees (**QSD**) 352 352 353 353 Ex: #5QSD<cr> might return *5QSD1800<cr> 354 354 355 -By default QSD will return the current session value, which is set to the value of CSD as reset/power cycle and changed whenever an SD/SR command is processed. 356 -If #5QSD1<cr> is sent, the configured maximum speed (CSD value) will be returned instead. You can also query the current speed using "2" and the current target travel speed using "3". See the table below for an example: 265 +Note that the QSD query will return the current servo speed. Querying the last maximum speed value set using SD or CSD is not possible. 357 357 358 -|**Command sent**|**Returned value (1/10 °)** 359 -|ex: #5QSD<cr>|Session value for maximum speed (set by latest SD/SR command) 360 -|ex: #5QSD1<cr>|Configured maximum speed in EEPROM (set by CSD/CSR) 361 -|ex: #5QSD2<cr>|Instantaneous speed (same as QWD) 362 -|ex: #5QSD3<cr>|Target travel speed 363 - 364 364 Configure Speed in Degrees (**CSD**) 365 365 366 366 Ex: #5CSD1800<cr> ... ... @@ -367,350 +367,251 @@ 367 367 368 368 Using the CSD command sets the servo's maximum speed which is saved in EEPROM. In the example above, the servo's maximum speed will be set to 180.0 degrees per second. When the servo is powered on (or after a reset), the CSD value is used. Note that CSD and CSR (described below) are effectively the same, but allow the user to specify the speed in either unit. The last command (either CSR or CSD) is what the servo uses for that session. 369 369 370 - ======__13.MaxSpeed in RPM (**SR**)__======273 +__13. Speed in RPM (**SR**)__ 371 371 372 372 Ex: #5SD45<cr> 373 373 374 -This command sets the servo's maximum speed for motionreceived is what the servo uses for that session.277 +This command sets the servo's maximum speed for action commands in rpm for that session. In the example above, the servo's maximum speed for that session would be set to 45rpm. Therefore maximum speed for actions can be set "on the fly". The servo's maximum speed cannot be set higher than its physical limit at a given voltage. SD overrides CSD (described below) for that session. Upon reset or power cycle, the servo reverts to the value associated with CSD as described below. Note that SD (described above) and SR are effectively the same, but allow the user to specify the speed in either unit. The last command (either SR or SD) is what the servo uses for that session. 375 375 376 376 Query Speed in Degrees (**QSR**) 377 377 378 378 Ex: #5QSR<cr> might return *5QSR45<cr> 379 379 380 -By default QSR will return the current session value, which is set to the value of CSR as reset/power cycle and changed whenever an SD/SR command is processed. 381 -If #5QSR1<cr> is sent, the configured maximum speed (CSR value) will be returned instead. You can also query the current speed using "2" and the current target travel speed using "3". See the table below for an example: 283 +Note that the QSD query will return the current servo speed. Querying the last maximum speed value set using SR or CSR is not possible. 382 382 383 -|**Command sent**|**Returned value (1/10 °)** 384 -|ex: #5QSR<cr>|Session value for maximum speed (set by latest SD/SR command) 385 -|ex: #5QSR1<cr>|Configured maximum speed in EEPROM (set by CSD/CSR) 386 -|ex: #5QSR2<cr>|Instantaneous speed (same as QWR) 387 -|ex: #5QSR3<cr>|Target travel speed 285 +Configure Speed in Degrees (**CSR**) 388 388 389 -Configure Speed in RPM (**CSR**) 390 - 391 391 Ex: #5CSR45<cr> 392 392 393 -Using the CS Rcommand sets the servo's maximum speed which is saved in EEPROM. In the example above, the servo's maximum speed will be set to 45rpm. When the servo is powered on (or after a reset), the CSRvalue is used. Note that CSD and CSR are effectively the same, but allow the user to specify the speed in either unit. The last command (either CSR or CSD)received is what the servo uses for that session.289 +Using the CSD command sets the servo's maximum speed which is saved in EEPROM. In the example above, the servo's maximum speed will be set to 45rpm. When the servo is powered on (or after a reset), the CSD value is used. Note that CSD and CSR are effectively the same, but allow the user to specify the speed in either unit. The last command (either CSR or CSD) is what the servo uses for that session. 394 394 395 - ======__14.LEDColor (**LED**)__======291 +__14. Angular Acceleration (**AA**)__ 396 396 397 - Ex:#5LED3<cr>293 +{More information coming soon} 398 398 399 - This action sets the servo's RGB LEDcolor for that session.The LED can be used for aesthetics, or (based on user code) to provide visual status updates. Using timing can create patterns.295 +Ex: 400 400 401 - 0=Off (black); 1=Red 2=Green;3=Blue; 4=Yellow; 5=Cyan; 6=Magenta;7=White;297 +{Description coming soon} 402 402 403 -Query LEDColor (**QLED**)299 +Query Angular Acceleration (**QAA**) 404 404 405 -Ex: #5QLED<cr> might return *5QLED5<cr>301 +Ex: 406 406 407 - Thissimple query returnstheindicatedservo's LED color.303 +{Description coming soon} 408 408 409 -Configure LEDColor (**CLED**)305 +Configure Angular Acceleration (**CAA**) 410 410 411 - Configuring the LEDcolor via the CLED command sets the startup color of the servo after a reset or power cycle. Note that it also changes the session's LED color immediately as well.307 +Ex: 412 412 413 - ====== __15. GyreRotationDirection(**G**)__ ======309 +{Description coming soon} 414 414 415 - "Gyre" is defined as a circular course or motion.The effect of changing the gyre direction is as if youwere to useamirrorimageof acircle. CW = 1; CCW = -1. The factory defaults clockwise(CW).311 +__15. Angular Deceleration (**AD**)__ 416 416 417 - Ex:#5G-1<cr>313 +{More information coming soon} 418 418 419 - This command will cause servo #5's positions to be inverted, effectively causing the servo to rotate in the opposite direction given the same command. For examplein a 2WD robot, servos are often physically installed back to back, therefore setting one of the servos to a negative gyration, the same wheel command (ex WR30) to both servos will cause the robot to move forward or backward rather than rotate.315 +Ex: 420 420 421 - Query GyreDirection(**QG**)317 +{Description coming soon} 422 422 423 - Ex: #5QG<cr>mightreturn *5QG-1<cr>319 +Query Angular Acceleration (**QAD**) 424 424 425 - The value returned above means the servo is in a counter-clockwise gyration.321 +Ex: 426 426 427 - ConfigureGyre (**CG**)323 +{Description coming soon} 428 428 429 - Ex: #5CG-1<cr>325 +Configure Angular Acceleration (**CAD**) 430 430 431 - This changes the gyre direction as described above and also writes toEEPROM.327 +Ex: 432 432 433 - ====== __16. IdentificationNumber(**ID**)__ ======329 +{Description coming soon} 434 434 435 - A servo's identification number cannot be set "on the fly" and must be configured via the CID command described below.Thefactory default IDnumber for all servos is 0. Since smart servos are intended to be daisy chained, in order to respond differently from one another, the user must set different identification numbers. Servos with the same ID and baud rate will all receive and react to the same commands(assuming same baud rate).331 +__16. RGB LED (**LED**)__ 436 436 437 - QueryIdentification (**QID**)333 +Ex: #5LED3<cr> 438 438 439 - EX:#254QID<cr>might return*QID5<cr>335 +This action sets the servo's RGB LED color for that session.The LED can be used for aesthetics, or (based on user code) to provide visual status updates. Using timing can create patterns. 440 440 441 - Whenusing the query IDcommand,itis best to only have one servo connected and thus receive only one reply. This is useful when you are not sure of the servo's ID, but don't want to change it.Usingthebroadcast command (ID 254)withonly one servo will have that servo reply with its ID number (assuming the query is sent .Alternatively,pushing the button upon startup and temporarily setting the servoID to255will still result in the servo responding with its "real" ID.337 +0=OFF 1=RED 2=GREEN 3= BLUE 4=YELLOW 5=CYAN 6= 7=MAGENTA, 8=WHITE 442 442 443 - ConfigureID (**CID**)339 +Query LED Color (**QLED**) 444 444 445 -Ex: # 4CID5<cr>341 +Ex: #5QLED<cr> might return *5QLED5<cr> 446 446 447 - Setting aservo'sID in EEPROM isdone via the CID command. All servosconnected to the same serial bus will be assigned that ID. In most situations each servo must be set a uniqueID, which means each servo must be connected individuallyto the serial bus and receive aunique CID number. It isbestto do this beforethe servos are added to anassembly. Numberedstickersare providedto distinguisheach servo after their ID is set, though you are free to use whatever alternative methodyou like. Theservomustbe RESETor powercycled inorder for the new ID to take effect.343 +This simple query returns the indicated servo's LED color. 448 448 449 - ====== __17. Baud Rate__======345 +Configure LED Color (**CLED**) 450 450 451 - A servo's baudrate cannotbe set"on thefly"and must beconfiguredvia the CBcommanddescribed below. The factory default baud rate for allservosis 115200. Since smartservos are intended to be daisy chained,in order to respondto the same serial bus, all servos in aprojectshould ideally be set tothe same baudrate.Setting differentbaud rates willhavetheservosrespond differentlyandmay create issues. Available baud ratesare: 9600 bps, 19200 bps, 38400 bps, 57600 bps, 115.2 kbps, 230.4 kbps, 250.0 kbps, 460.8 kbps, 500.0 kbps. Servos areshippedwith a baud rateset to 9600. The baudratesarecurrentlyrestricted to those above.347 +Configuring the LED color via the CLED command sets the startup color of the servo after a reset or power cycle. 452 452 453 - QueryBaudRate(**QB**)349 +__17. Identification Number__ 454 454 455 - Ex:#5QB<cr>might return*5QB9600<cr>351 +A servo's identification number cannot be set "on the fly" and must be configured via the CID command described below. The factory default ID number for all servos is 1. Since smart servos are intended to be daisy chained, in order to respond differently from one another, the user must set different identification numbers. Servos with the same ID and baud rate will all receive and react to the same commands. 456 456 457 - Since the command to querythebaudratemust be done atthe servo's existing baud rate, it can simply be used to confirm the CBconfigurationcommand was correctly received before the servo is power cycled and the new baud rate takes effect.353 +Query Identification (**QID**) 458 458 459 - ConfigureBaudRate (**CB**)355 +EX: #QID<cr> might return *QID5<cr> 460 460 461 - ImportantNote:theservo'scurrent sessionretainsthe givenbaudrate ande new baudratewillonlytake effect whentheservo is power cycled / RESET.357 +When using the query ID command, it is best to only have one servo connected and thus receive only one reply. 462 462 463 - Ex: #5CB9600<cr>359 +Configure ID (**CID**) 464 464 465 - Sendingthis command will change the baud rate associated with servoIDto 9600 bits per second.361 +Ex: #CID5<cr> 466 466 467 - ======__18.{//Coming soon//}__======363 +Setting a servo's ID in EEPROM is done via the CID command. All servos connected to the same serial bus will be assigned that ID. In most situations each servo must be set a unique ID, which means each servo must be connected individually to the serial bus and receive a unique CID number. It is best to do this before the servos are added to an assembly. Numbered stickers are provided to distinguish each servo after their ID is set, though you are free to use whatever alternative method you like. 468 468 469 - Commandcoming soon....365 +__18. Baud Rate__ 470 470 471 - ======__19.FirstPosition(Degrees)__======367 +A servo's baud rate cannot be set "on the fly" and must be configured via the CB command described below. The factory default baud rate for all servos is 9600. Since smart servos are intended to be daisy chained, in order to respond to the same serial bus, all servos in that project should ideally be set to the same baud rate. Setting different baud rates will have the servos respond differently and may create issues. Standard / suggested baud rates are: 4800; 9600; 14400; 19200; 38400; 57600; 115200; 128000; 256000, 512000 bits per second. Servos are shipped with a baud rate set to 9600. The baud rates are currently restricted to those above 472 472 473 - In certain cases, ausermight want to have the servo move to a specific angle upon power up; we refer to this as "first position" (a.k.a. "initial position"). The factorydefault has no first position value storedin EEPROMandthereforeupon power up, the servo remains limp until a position(or hold command)is assigned. Note that the number should be restricted to -1790 (-179.0 degrees) to +1790 (179.0 degrees) and values beyond this will be changed to 1800.369 +Query Baud Rate (**QB**) 474 474 475 -Q ueryFirstPositionin Degrees (**QFD**)371 +Ex: #5QB<cr> might return *5QB9600<cr> 476 476 477 - Ex: #5QFD<cr> might return*5QFD64<cr>373 +Querying the baud rate is used simply to confirm the CB configuration command before the servo is power cycled. 478 478 479 - The reply above indicates that servo with ID 5 has afirst position pulse of 1550 microseconds.If there is no first position value stored,thereply will be DIS375 +Configure Baud Rate (**CB**) 480 480 481 - ConfigureFirst Position in Degrees (**CFD**)377 +Ex: #5CB9600<cr> 482 482 483 - Ex:#5CD64<cr>379 +Sending this command will change the baud rate associated with servo ID 5 to 9600 bits per second. 484 484 485 - Thisconfiguration command meansthe servo, when setto smartmode, will immediately move to 6.4 degrees uponpower up. Sending a CFDcommand without a number(Ex. #5CFD<cr>) resultsin the servoremaining limp upon power up. In order to remove the first position, send no value, ex: #5CFD<cr>381 +__19. Gyre Rotation Direction__ 486 486 487 - ======__20.QueryModelString(**QMS**)__======383 +"Gyre" is defined as a circular course or motion. The effect of changing the gyre direction is as if you were to use a mirror image of a circle. CW = 1; CCW = -1. The factory default is clockwise (CW). 488 488 489 - Ex: #5QMS<cr> mightreturn*5QMSLSS-HS1cr>385 +{images showing before and after with AR and Origin offset} 490 490 491 - This replymeans the servo model isLSS-HS1, meaning a high speed servo, first revision.387 +Query Gyre Direction (**QG**) 492 492 493 - ======__21.QuerySerialNumber(**QN**)__ ======389 +Ex: #5QG<cr> might return *5QG-1<cr> 494 494 495 - Ex:#5QN<cr>mightreturn*5QN12345678<cr>391 +The value returned above means the servo is in a counter-clockwise gyration. 496 496 497 - The number in the response (12345678) would be the servo's serial numberwhich is setand should not be changed bytheuser.393 +Configure Gyre (**CG**) 498 498 499 - ======__22. Query Firmware (**QF**)__ ======395 +Ex: #5CG-1<cr> 500 500 501 - Ex:#5QF<cr> might return*5QF411<cr>397 +This changes the gyre direction as described above and also writes to EEPROM. 502 502 503 - Thenumberin thereply representsthefirmwareversion,in this examplebeing 411.399 +__20. First / Initial Position (pulse)__ 504 504 505 - ======__23.QueryStatus (**Q**)__======401 +In certain cases, a user might want to have the servo move to a specific angle upon power up. We refer to this as "first position". The factory default has no first position value stored in EEPROM and therefore upon power up, the servo remains limp until a position (or hold command) is assigned. FP and FD are different in that FP is used for RC mode only, whereas FD is used for serial mode only. 506 506 507 - The status querydescribed what the servo iscurrentlydoing. The query returnsaninteger which must be looked up inthe table below. Use the CLB advanced command to have the LED blinkfor certain statuses.403 +Query First Position in Pulses (**QFP**) 508 508 509 -Ex: #5Q<cr> might return *5Q 6<cr>,which indicates the motor is holding a position.405 +Ex: #5QFP<cr> might return *5QFP1550<cr> 510 510 511 -|***Value returned (Q)**|**Status**|**Detailed description** 512 -|ex: *5Q0<cr>|0: Unknown|LSS is unsure / unknown state 513 -|ex: *5Q1<cr>|1: Limp|Motor driving circuit is not powered and horn can be moved freely 514 -|ex: *5Q2<cr>|2: Free moving|Motor driving circuit is not powered and horn can be moved freely 515 -|ex: *5Q3<cr>|3: Accelerating|Increasing speed from rest (or previous speed) towards travel speed 516 -|ex: *5Q4<cr>|4: Traveling|Moving at a stable speed 517 -|ex: *5Q5<cr>|5: Decelerating|Decreasing from travel speed towards final position. 518 -|ex: *5Q6<cr>|6: Holding|Keeping current position 519 -|ex: *5Q7<cr>|7: Outside limits|{More details coming soon} 520 -|ex: *5Q8<cr>|8: Stuck|Motor cannot perform request movement at current speed setting 521 -|ex: *5Q9<cr>|9: Blocked|Similar to stuck, but the motor is at maximum duty and still cannot move (i.e.: stalled) 522 -|ex: *5Q10<cr>|10: Safe Mode|((( 523 -A safety limit has been exceeded (temperature, peak current or extended high current draw). 407 +The reply above indicates that servo with ID 5 has a first position pulse of 1550 microseconds. 524 524 525 -Send a Q1 command to know which limit has been reached (described below). 526 -))) 409 +Configure First Position in Pulses (CFP) 527 527 528 -(% class="wikigeneratedid" %) 529 -If a safety limit has been reached and exceeded, the LED will flash red and the servo will stop providing torque (no longer react to commands which cause the motor to rotate). In order to determine which limit has been reached, send a Q1 command. The servo must be RESET in order to return to normal operation, though if a limit is still detected (for example the servo is still too hot), it will revert back to Safe Mode. 411 +Ex: #5CP1550<cr> 530 530 531 -|***Value returned (Q1)**|**Status**|**Detailed description** 532 -|ex: *5Q0<cr>|No limits have been passed|Nothing is wrong 533 -|ex: *5Q1<cr>|Current limit has been passed|Something cause the current to either spike, or remain too high for too long 534 -|ex: *5Q2<cr>|Input voltage detected is below or above acceptable range|Check the voltage of your batteries or power source 535 -|ex: *5Q3<cr>|Temperature limit has been reached|The servo is too hot to continue operating safely. 413 +This configuration command means the servo, when set to RC mode, will immediately move to an angle equivalent to having received an RC pulse of 1550 microseconds upon power up. Sending a CFP command without a number results in the servo remaining limp upon power up. 536 536 537 - ======__24.QueryVoltage(**QV**)__======415 +__21. First / Initial Position (Degrees)__ 538 538 539 - Ex:#5QV<cr>might return*5QV11200<cr>417 +In certain cases, a user might want to have the servo move to a specific angle upon power up. We refer to this as "first position". The factory default has no first position value stored in EEPROM and therefore upon power up, the servo remains limp until a position (or hold command) is assigned. FP and FD are different in that FP is used for RC mode only, whereas FD is used for serial mode only. 540 540 541 - The number returned hasone decimal, so inthecase above,servo with ID 5 has an inputvoltageof 11.2V (perhapsa three cell LiPo battery).419 +Query First Position in Degrees (**QFD**) 542 542 543 - ======__25.QueryTemperature(**QT**)__======421 +Ex: #5QFD<cr> might return *5QFD64<cr> 544 544 545 - Ex: #5QT<cr>mightreturn*5QT564<cr>423 +The reply above indicates that servo with ID 5 has a first position pulse of 1550 microseconds. 546 546 547 - The units are in tenths of degreesCelcius, sointhe example above, the servo'sinternal temperature is 56.4 degreesC. To convertfrom degreesCelciustodegrees Farenheit,multiply by 1.8 andadd 32. Therefore56.4C= 133.52F.425 +Configure First Position in Degrees (**CFD**) 548 548 549 - ======__26. Query Current (**QC**)__ ======427 +Ex: #5CD64<cr> 550 550 551 - Ex:#5QC<cr>might return*5QC140<cr>429 +This configuration command means the servo, when set to serial mode, will immediately move to 6.4 degrees upon power up. Sending a CFD command without a number results in the servo remaining limp upon power up. 552 552 553 - Theunitsare in milliamps, so inthexampleabove, theservois consuming 140mA, or 0.14A.431 +__22. Query Target Position in Degrees (**QDT**)__ 554 554 555 - ======__27.ConfigureRC Mode (**CRC**)__ ======433 +Ex: #5QDT<cr> might return *5QDT6783<cr> 556 556 557 -Th iscommand puts theservointo RC mode(positionorcontinuous),whereitwill onlyrespond toRCpulses.Note thatbecausethisisthecase, the servowillnolongeracceptserialcommands.The servocanbeplacedbackintosmartmodebyusingthe buttonmenu.435 +The query target position command returns the target angle during and after an action which results in a rotation of the servo horn. In the example above, the servo is rotating to a virtual position of 678.3 degrees. Should the servo not have a target position or be in wheel mode, it will respond without a number (Ex: *5QDT<cr>). 558 558 559 -|**Command sent**|**Note** 560 -|ex: #5CRC1<cr>|Change to RC position mode. 561 -|ex: #5CRC2<cr>|Change to RC continuous (wheel) mode. 562 -|ex: #5CRC*<cr>|Where * is any number or value other than 1 or 2 (or no value): stay in smart mode. 437 +__23. Query Model (**QM**)__ 563 563 564 -E X: #5CRC2<cr>439 +Ex: #5QM<cr> might return *5QM11<cr> 565 565 566 -This commandwould placethe servoin RC wheelmodeaftera RESET or power cycle.Notethatafter a RESET orpower cycle,theservowill be in RC mode and will not reply toserial commands.Usingthecommand#5CRC<cr>or #5CRC3<cr>whichrequests that the servoemain in serial mode still requires a RESET command.441 +This reply means the servo model is 1.1, meaning high speed servo, first revision. 1=HS (high speed) 2=ST (standard) 3=HT (high torque) 567 567 568 - Importantnote:** **To revert from RC mode back to serial mode, the [[LSS - Button Menu>>doc:lynxmotion-smart-servo.lss-button-menu.WebHome]]is required.Should thebutton be inaccessible (orbroken) when the servois in RC modeand the user needs to change to serial mode, a 5V constant HIGH needs tobesent to the servo'sRx pin(RC PWM pin), ensuring a common GND and wait for 30 seconds. Normal RC PWM pulses should not exceed 2500 milliseconds. After 30 seconds, the servo will interpret this as a desired mode change and change to serial mode. This has been implemented as a fail safe.443 +__24. Query Serial Number (**QN**)__ 569 569 570 - ======__28.**RESET**__======445 +Ex: #5QN<cr> might return *5QN~_~_<cr> 571 571 572 - Ex: #5RESET<cr>or#5RS<cr>447 +The number in the response is the servo's serial number which is set and cannot be changed. 573 573 574 - Thiscommand does a "softreset" (no power cyclerequired) and reverts all commands to those storedin EEPROM(i.e. configuration commands).449 +__25. Query Firmware (**QF**)__ 575 575 576 - ====== __29. **DEFAULT** &CONFIRM__======451 +Ex: #5QF<cr> might return *5QF11<cr> 577 577 578 - Ex: #5DEFAULT<cr>453 +The integer in the reply represents the firmware version with one decimal, in this example being 1.1 579 579 580 - Thiscommand sets in motion the reset of all values to the default values included with the version of the firmware installed on that servo. The servo then waits for the CONFIRM command. Anyother command received will causethe servo to exit the DEFAULT function.455 +__26. Query Status (**Q**)__ 581 581 582 -E X: #5DEFAULT<cr>followedby #5CONFIRM<cr>457 +Ex: #5Q<cr> might return *5Q_<cr> 583 583 584 - Sinceit it not common to have to restore allconfigurations, a confirmation commandisneededafter a firmware command issent. Should any command other than CONFIRM be received by the servo after the firmware command has been received, it will exit the command.459 +{Description coming soon} 585 585 586 - Notethat afterthe CONFIRM command is sent, the servo will automatically performa RESET.461 +__27. Query Voltage (**QV**)__ 587 587 588 - ======__30.**UPDATE** &CONFIRM__======463 +Ex: #5QV<cr> might return *5QV112<cr> 589 589 590 - Ex:#5UPDATE<cr>465 +The number returned has one decimal, so in the case above, servo with ID 5 has an input voltage of 11.2V (perhaps a three cell LiPo battery). 591 591 592 - This command sets in motion the equivalent of a long button press when the servo is not powered in order to enter firmware update mode.This isuseful should the button be brokenor inaccessible.Theservo then waits for the CONFIRM command. Any othercommand received will causethe servo toexitthe UPDATE function.467 +__28. Query Temperature (**QT**)__ 593 593 594 -E X: #5UPDATE<cr>followedby #5CONFIRM<cr>469 +Ex: #5QT<cr> might return *5QT564<cr> 595 595 596 - Since ititnotcommonohavetoupdatefirmware,aconfirmationcommandisneededafteranUPDATE commandissent.ShouldanycommandotherhanCONFIRMbeceivedby theervoafterthefirmwarecommandhas been received,itwillleavetheirmwareaction.471 +The units are in tenths of degrees Celcius, so in the example above, the servo's internal temperature is 56.4 degrees C. To convert from degrees Celcius to degrees Farenheit, multiply by 1.8 and add 32. Therefore 56.4C = 133.52F. 597 597 598 - Notethat aftertheCONFIRM command is sent,the servo will automatically perform a RESET.473 +__29. Query Current (QC)__ 599 599 600 - ==Details- Advanced==475 +Ex: #5QC<cr> might return *5QC140<cr> 601 601 602 -The motioncontrollerusedinserialodeis notthesame asthemotion controller usein RC mode.RC modeisintended to add functionality to what would be considered "normal"RC behaviorbased on PWM input.477 +The units are in milliamps, so in the example above, the servo is consuming 140mA, or 0.14A. 603 603 604 - ======__A1. Angular Stiffness (**AS**)__======479 +__**RESET**__ 605 605 606 - Theservo's rigidity / angular stiffnesscan be thought of as (though not identical to) a damped springin which the value affects the stiffness and embodies how much, and how quickly the servotried keep the requested position againstchanges. There are no units.481 +Ex: #5RESET<cr> or #5RS<cr> 607 607 608 - Apositiveue of"angularstiffness":483 +This command does a "soft reset" (no power cycle required) and reverts all commands to those stored in EEPROM (i.e. configuration commands). 609 609 610 -* The more torque will be applied to try to keep the desired position against external input / changes 611 -* The faster the motor will reach its intended travel speed and the motor will decelerate faster and nearer to its target position 485 +**__DEFAULT__** 612 612 613 - Anegative value on the otherhand:487 +Ex: #5DEFAULT<cr> 614 614 615 -* Causes a slower acceleration to the travel speed, and a slower deceleration 616 -* Allows the target position to deviate more from its position before additional torque is applied to bring it back 489 +This command sets all values to the default values included with the version of the firmware installed on that servo. 617 617 618 - The default value for stiffness depending on the firmware may be 0 or 1. Greater values produce increasingly erratic behavior and the effect becomes extreme below -4 and above +4.Maximumvaluesare -10 to +10.491 +__**FIRMWARE** & **CONFIRM**__ 619 619 620 -Ex: #5A S-2<cr>493 +Ex: #5FIRMWARE<cr> 621 621 622 -This reducestheangularstiffnessto-2 for that session,allowing theservo to deviatemorearoundthedesiredposition.Thiscanbebeneficialin manysituationssuch as impacts(legged robots)wheremore ofa"spring"effectis desired. Uponreset,theservowillusethevaluestored inmemory,based on thelast configurationcommand.495 +This command clears all user-input values in EEPROM and reverts back to factory defaults for the firmware installed. It does not overwrite any firmware updates. To revert to an older firmware version, please refer to the LSS - Firmware page. The firmware command alone does nothing other than have the servo wait for a confirmation. 623 623 624 -E x: #5QAS<cr>497 +EX: #5FIRMWARE<cr> followed by #5CONFIRM<cr> 625 625 626 - Queries thevalue beingused.499 +Since it it not common to have to restore all configurations, a confirmation command is needed after a firmware command is sent. Should any command other than CONFIRM be received by the servo after the firmware command has been received, it will leave the firmware action. 627 627 628 -Ex: #5CAS<cr> 629 629 630 - Writesthe desiredangular stiffness valueto memory.502 +=== Virtual Angular Position === 631 631 632 - ====== __A2. AngularHoldingStiffness(**AH**)__ ======504 +{In progress} 633 633 634 - Theangular holdingstiffnessdeterminestheservo'sability toholda desiredpositionunder load.Thedefaultvalueforstiffnessdependingonthefirmwaremay be 0 or 1. Greatervaluesproduce increasingly erratic behaviorandthe effect becomes extremebelow -4and above +4. Maximum valuesare -10to+10. Note that whenconsideringalteringastiffnessvalue,theendeffectdependsonthemodebeingtested.506 +A "virtual position" is one which allows for multiple rotations of the output horn, moving the center position and more. The "absolute position" would be the angle of the output shaft with respect to 360.0 degrees. 635 635 636 - Ex:#5AH3<cr>508 +[[image:LSS-servo-positions.jpg]] 637 637 638 - This setstheholdingstiffnessforservo#5 to3for thatsession.510 +Example: Gyre direction / rotation is positive (clockwise), and origin offset has not been modified. 639 639 640 - QueryAngularHoldStiffness(**QAH**)512 +#1D-300<cr> The servo is commander to move to -30.0 degrees (green arrow) 641 641 642 - Ex:#5QAH<cr> might return*5QAH3<cr>514 +#1D2100<cr> This second position command is sent to the servo, which moves it to 210.0 degrees (orange arrow) 643 643 644 -Th is returns theservo's angularholding stiffnessvalue.516 +#1D-4200<cr> The servo rotates counterclockwise to a position of -420 degrees (red arrow), which means one full rotation of 360 degrees and (420.0-360.0) stopping at an absolute position of 60.0 degrees, but virtual position of -420.0. 645 645 646 - ConfigureAngularHoldStiffness(**CAH**)518 +Although the final position would be the same as if the servo were commanded to move to -60.0 degrees, it is in fact at -420.0 degrees. 647 647 648 -Ex: #5CAH2<cr> 649 - 650 -This writes the angular holding stiffness of servo #5 to 2 to EEPROM. Note that when considering altering a stiffness value, the end effect depends on the mode being tested. 651 - 652 -====== __A3: Angular Acceleration (**AA**)__ ====== 653 - 654 -The default value for angular acceleration is 100, which is the same as the maximum deceleration. Accepts values of between 1 and 100. Increments of 10 degrees per second squared. 655 - 656 -Ex: #5AA30<cr> 657 - 658 -Query Angular Acceleration (**QAD**) 659 - 660 -Ex: #5QA<cr> might return *5QA30<cr> 661 - 662 -Configure Angular Acceleration (**CAD**) 663 - 664 -Ex: #5CA30<cr> 665 - 666 -====== __A4: Angular Deceleration (**AD**)__ ====== 667 - 668 -The default value for angular deceleration is 100, which is the same as the maximum acceleration. Values between 1 and 15 have the greatest impact. 669 - 670 -Ex: #5AD8<cr> 671 - 672 -Query Angular Deceleration (**QAD**) 673 - 674 -Ex: #5QD<cr> might return *5QD8<cr> 675 - 676 -Configure Angular Deceleration (**CAD**) 677 - 678 -Ex: #5CD8<cr> 679 - 680 -====== __A5: Motion Control (**EM**)__ ====== 681 - 682 -The command EM0 disables use of the motion controller (acceleration, velocity / travel, deceleration). As such, the servo will move at full speed for all motion commands. The command EM1 enables use of the motion controller. 683 - 684 -Note that if the modifiers S or T are used, it is assumed that motion control is desired, and for that command, EM1 will be used. 685 - 686 -====== __A6. Configure LED Blinking (**CLB**)__ ====== 687 - 688 -This command allows you to control when the RGB LED will blink the user set color (see [[16. RGB LED>>||anchor="H16.RGBLED28LED29"]] for details). This is very useful when visually seeing what the servo is doing. You can turn on or off blinking for various LSS status. The command requires that the servo be RESET. Here is the list and their associated value: 689 - 690 -(% style="width:195px" %) 691 -|(% style="width:134px" %)**Blink While:**|(% style="width:58px" %)**#** 692 -|(% style="width:134px" %)No blinking|(% style="width:58px" %)0 693 -|(% style="width:134px" %)Limp|(% style="width:58px" %)1 694 -|(% style="width:134px" %)Holding|(% style="width:58px" %)2 695 -|(% style="width:134px" %)Accelerating|(% style="width:58px" %)4 696 -|(% style="width:134px" %)Decelerating|(% style="width:58px" %)8 697 -|(% style="width:134px" %)Free|(% style="width:58px" %)16 698 -|(% style="width:134px" %)Travelling|(% style="width:58px" %)32 699 -|(% style="width:134px" %)Always blink|(% style="width:58px" %)63 700 - 701 -To set blinking, use CLB with the value of your choosing. To activate blinking in multiple status, simply add together the values of the corresponding status. See examples below: 702 - 703 -Ex: #5CLB0<cr> to turn off all blinking (LED always solid) 704 -Ex: #5CLB1<cr> only blink when limp (1) 705 -Ex: #5CLB2<cr> only blink when holding (2) 706 -Ex: #5CLB12<cr> only blink when accel or decel (accel 4 + decel 8 = 12) 707 -Ex: #5CLB48<cr> only blink when free or travel (free 16 + travel 32 = 48) 708 -Ex: #5CLB63<cr> blink in all status (1 + 2 + 4 + 8 + 16 + 32) 709 - 710 -RESETTING the servo is needed. 711 - 712 -= RGB LED Patterns = 713 - 714 -The LED patterns below do not include those which are part of the button menu, which can be found here: [[LSS Button Menu>>doc:lynxmotion-smart-servo.lss-button-menu.WebHome]] 715 - 716 -[[image:LSS - LED Patterns.png]] 520 +#1D4800<cr> This new command is sent which would then cause the servo to rotate from -420.0 degrees to 480.0 degrees, which would be a total of 900 degrees of clockwise rotation, or 2.5 complete rotations.
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