I'm looking to get pressure and temperature readings from a quadrotor in flight. I saw that the baro outputs to the .tlog the temperature and the pressure. However, I don't know the units it outputs in. Does anyone know?
-Jake
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Replies
Hi,
It's telemetry log, right? It has got to be this, from Log.pde:
static void NOINLINE send_raw_imu2(mavlink_channel_t chan)
{
mavlink_msg_scaled_pressure_send(
chan,
millis(),
(float)barometer.get_pressure()/100.0,
(float)(barometer.get_pressure() - barometer.get_ground_pressure())/100.0,
(int)(barometer.get_temperature()*10));
}
Temperature is:
float AP_Baro_MS5611::get_temperature()
{
// callers want the temperature in 0.1C units
return Temp/10;
}
and the Temp variable is in 1/100 degrees C. So the log data appears to be 100ths of degrees C divided by 10, truncated and then multiplied by 10 again ... that is, in 100th of degrees C but rounded down to nearest lower 1/10 degree.
Pressure is returned by the function in AP_Baro:
get_pressure() : return pressure in mbar*100 units
and then divided by 100 in Log.pde, so it appears to be mBar = hPa.
Which sort of numbers do you see, is it consistent with this?
Regards
Soren