Pixhawk I2C communication

Coconat · December 10, 2021, 11:51am

Hi everyone. I have an issue on my pressure sensor communication to pixhawk. I tried everything but I couldn’t activate it. My pressure sensor is working in arduino uno. However I should communicate between pixhawk i2c and jetson but first I must read data from pixhawk i2c. Can someone help me for this issue?

ppoirier · December 10, 2021, 11:52am

Hello,

What model of pressure sensor do you have ?

Please refer to wiki for supported models:
https://ardupilot.org/plane/docs/airspeed.html

Coconat · December 10, 2021, 7:10pm

i got MS5837-30BA.
https://www.ardusub.com/introduction/hardware-options/recommended-extras/pressure-sensor.html

ppoirier · December 10, 2021, 8:52pm

Oh… ArduSub is an interesting option I never tried.
It is in the BaroMeter library , and looking at code it is a subset of 5611

github.com

ArduPilot/ardupilot/blob/master/libraries/AP_Baro/AP_Baro_MS5611.cpp#L104

    
      
          hal.scheduler->delay(4);
          
          
const char *name = "MS5611";
          switch (_ms56xx_type) {
          case BARO_MS5607:
              name = "MS5607";
              FALLTHROUGH;
          case BARO_MS5611:
              prom_read_ok = _read_prom_5611(prom);
              break;
          case BARO_MS5837:
              name = "MS5837";
              prom_read_ok = _read_prom_5637(prom);
              break;
          case BARO_MS5637:
              name = "MS5637";
              prom_read_ok = _read_prom_5637(prom);
              break;
          }
          
          
if (!prom_read_ok) {

ArduSUB WIKI says, that this driver is installed by default. Just make sure it is powered correctly and that it is connected to the right I2C interface.

Interface to Companion Computer is done through MavLink , and you read the pressure message Barometer (external) — Copter documentation