Changes for page LSS Communication Protocol
Last modified by Eric Nantel on 2024/11/21 09:43
Change comment: Added tag [LSS, communication, protocol, programming, firmware]
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... ... @@ -42,6 +42,28 @@ 42 42 Modified commands are command specific. 43 43 ))) 44 44 45 +((( 46 + 47 +))) 48 + 49 +== Configuration Commands == 50 + 51 +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]]. 52 + 53 +1. Start with a number sign # (U+0023) 54 +1. Servo ID number as an integer 55 +1. Configuration command (two to three letters, no spaces, capital or lower case) 56 +1. Configuration value in the correct units with no decimal 57 +1. End with a control / carriage return '<cr>' 58 + 59 +Ex: #5CO-50<cr> 60 + 61 +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. 62 + 63 +Configuration commands are not cumulative, in that if two configurations are sent at any time, only the last configuration is used and stored. 64 + 65 +*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. 66 + 45 45 == Query Commands == 46 46 47 47 Query commands are sent serially to the servo's Rx pin and must be set in the following format: ... ... @@ -69,25 +69,21 @@ 69 69 ))) 70 70 71 71 Indicates that servo #5 is currently at 144.3 degrees. 72 -))) 73 73 74 - ==ConfigurationCommands ==95 +**Session vs Configuration Query** 75 75 76 - Configurationcommands affect theservo's current session* but unlike action commands, configurationcommandsarewritten to EEPROM and are retained even if theservoloses power (thereforeNOTsessionpecific).Not allaction commands havea correspondingconfigurationand viceversa. Certainconfigurationsareretained forwhen theservoisused in RC model.Moreinformationcan be found onthe[[LSS - RC PWM page>>doc:LynxmotionSmart Servos (LSS).LSS - RC PWM.WebHome]].97 +By default, the query command returns the sessions' value; should no action commands have been sent to change, it will return the value saved in EEPROM from the last configuration command. 77 77 78 -1. Start with a number sign # (U+0023) 79 -1. Servo ID number as an integer 80 -1. Configuration command (two to three letters, no spaces, capital or lower case) 81 -1. Configuration value in the correct units with no decimal 82 -1. End with a control / carriage return '<cr>' 99 +In order to query the value in EEPROM, add a '1' to the query command. 83 83 84 -Ex: #5C O-50<cr>101 +Ex: #5CSR20<cr> sets the maximum speed for servo #5 to 20rpm upon RESET (explained below). 85 85 86 -A ssigns an absoluteoriginoffsetof -5.0 degrees(with respectto factory origin) toservo#5 and changestheoffset for thatsession to-5.0 degrees.103 +After RESET: #5SR4<cr> sets the session's speed to 4rpm. 87 87 88 - Configurationcommandsarenotcumulative, inthatif two configurationsareat any time,onlythe lastconfiguration isused andstored.105 +#5QSR<cr> would return *5QSR4<cr> which represents the value for that session. 89 89 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. 107 +#5QSR1<cr> would return *5QSR20<cr> which represents the value in EEPROM 108 +))) 91 91 92 92 = Command List = 93 93 ... ... @@ -343,7 +343,7 @@ 343 343 344 344 __17. Identification Number__ 345 345 346 -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.364 +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 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. 347 347 348 348 Query Identification (**QID**) 349 349 ... ... @@ -359,7 +359,7 @@ 359 359 360 360 __18. Baud Rate__ 361 361 362 -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, 512000bits per second. Servos are shipped with a baud rate set to 9600. The baud rates are currently restricted to those above380 +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: 9600; 19200; 38400; 57600; 115200 bits per second. Servos are shipped with a baud rate set to 9600. The baud rates are currently restricted to those above 363 363 364 364 Query Baud Rate (**QB**) 365 365