ArduPilotMega 1.0.0 Commands Command Structure in bytes 0 0x00 byte Command ID 1 0x01 byte Parameter 1 2 0x02 int Parameter 2 3 0x03 .. 4 0x04 long Parameter 3 5 0x05 .. 6 0x06 .. 7 0x07 .. 8 0x08 long Parameter 4 9 0x09 .. 10 0x0A .. 11 0x0B .. 0x00 Reserved .... 0x0F Reserved *********************************** Commands 0x10 to 0x2F are commands that have a end criteria, eg "reached waypoint" or "reached altitude" *********************************** Command ID Name Parameter 1 Altitude Latitude Longitude 0x10 CMD_WAYPOINT - altitude lat lon 0x11 CMD_LOITER (indefinitely) - altitude lat lon 0x12 CMD_LOITER_N_TURNS turns altitude lat lon 0x13 CMD_LOITER_TIME time (seconds*10) altitude lat lon 0x14 CMD_RTL - altitude lat lon 0x15 CMD_LAND - altitude lat lon 0x16 CMD_TAKEOFF takeoff pitch altitude - - NOTE: for command 0x16 the value takeoff pitch specifies the minimum pitch for the case with airspeed sensor and the target pitch for the case without. *********************************** May Commands - these commands are optional to finish Command ID Name Parameter 1 Parameter 2 Parameter 3 Parameter 4 0x20 CMD_DELAY - - time (milliseconds) - 0x21 CMD_CLIMB rate (cm/sec) alt (finish) - - 0x22 CMD_LAND_OPTIONS distance to WP airspeed m/s, throttle %, pitch deg *********************************** Unexecuted commands >= 0x20 are dropped when ready for the next command <= 0x1F so plan/queue commands accordingly! For example if you had a string of 0x21 commands following a 0x10 command that had not finished when the waypoint was reached, the unexecuted 0x21 commands would be skipped and the next command <= 0x1F would be loaded *********************************** Now Commands - these commands are executed once until no more new now commands are available 0x31 CMD_RESET_INDEX 0x32 CMD_GOTO_INDEX index repeat count 0x33 CMD_GETVAR_INDEX variable ID 0x34 CMD_SENDVAR_INDEX off/on = 0/1 0x35 CMD_TELEMETRY off/on = 0/1 0x40 CMD_THROTTLE_CRUISE speed 0x41 CMD_AIRSPEED_CRUISE speed 0x44 CMD_RESET_HOME altitude lat lon 0x60 CMD_KP_GAIN array index gain value*100,000 0x61 CMD_KI_GAIN array index gain value*100,000 0x62 CMD_KD_GAIN array index gain value*100,000 0x63 CMD_KI_MAX array index gain value*100,000 0x64 CMD_KFF_GAIN array index gain value*100,000 0x70 CMD_RADIO_TRIM array index value 0x71 CMD_RADIO_MAX array index value 0x72 CMD_RADIO_MIN array index value 0x73 CMD_ELEVON_TRIM array index value (index 0 = elevon 1 trim, 1 = elevon 2 trim) 0x75 CMD_INDEX index 0x80 CMD_REPEAT type value delay in sec repeat count 0x81 CMD_RELAY (0,1 to change swicth position) 0x82 CMD_SERVO number value