px4-firmware/msg/RcChannels.msg

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uint64 timestamp # time since system start (microseconds)
uint8 FUNCTION_THROTTLE = 0
uint8 FUNCTION_ROLL = 1
uint8 FUNCTION_PITCH = 2
uint8 FUNCTION_YAW = 3
uint8 FUNCTION_RETURN = 4
uint8 FUNCTION_LOITER = 5
uint8 FUNCTION_OFFBOARD = 6
uint8 FUNCTION_FLAPS = 7
uint8 FUNCTION_AUX_1 = 8
uint8 FUNCTION_AUX_2 = 9
uint8 FUNCTION_AUX_3 = 10
uint8 FUNCTION_AUX_4 = 11
uint8 FUNCTION_AUX_5 = 12
uint8 FUNCTION_AUX_6 = 13
uint8 FUNCTION_PARAM_1 = 14
uint8 FUNCTION_PARAM_2 = 15
uint8 FUNCTION_PARAM_3_5 = 16
uint8 FUNCTION_KILLSWITCH = 17
uint8 FUNCTION_TRANSITION = 18
uint8 FUNCTION_GEAR = 19
uint8 FUNCTION_ARMSWITCH = 20
uint8 FUNCTION_FLTBTN_SLOT_1 = 21
uint8 FUNCTION_FLTBTN_SLOT_2 = 22
uint8 FUNCTION_FLTBTN_SLOT_3 = 23
uint8 FUNCTION_FLTBTN_SLOT_4 = 24
uint8 FUNCTION_FLTBTN_SLOT_5 = 25
uint8 FUNCTION_FLTBTN_SLOT_6 = 26
uint8 FUNCTION_ENGAGE_MAIN_MOTOR = 27
uint8 FUNCTION_FLTBTN_SLOT_COUNT = 6
uint64 timestamp_last_valid # Timestamp of last valid RC signal
float32[18] channels # Scaled to -1..1 (throttle: 0..1)
uint8 channel_count # Number of valid channels
int8[28] function # Functions mapping
uint8 rssi # Receive signal strength index
bool signal_lost # Control signal lost, should be checked together with topic timeout
uint32 frame_drop_count # Number of dropped frames