px4-firmware/msg/AdcReport.msg

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uint64 timestamp # time since system start (microseconds)
uint32 device_id # unique device ID for the sensor that does not change between power cycles
int16[12] channel_id # ADC channel IDs, negative for non-existent, TODO: should be kept same as array index
int32[12] raw_data # ADC channel raw value, accept negative value, valid if channel ID is positive
uint32 resolution # ADC channel resolution
float32 v_ref # ADC channel voltage reference, use to calculate LSB voltage(lsb=scale/resolution)