I am looking to read PX4_ERR messages and assume I would read them over the IO Debug port on the side of my Pixhawk 4. I hooked pin 4 (pixhawk tx) and pin 5 (pixhawk rx) to an oscilloscope and saw no activity with tx reading high and rx reading low. When I connected it to the computer with an ftdi a…

I assume you want to debug PX4_ERR “printfs” of the FMU side (not IO side)? In that case you need to connect the FTDI adapter (or Dronecode Debug probe) to the “FMU Debug” port.

Thanks I am getting some messages now.

Dear Julian Coud you help me please. After an unsuccessful firmware flashing using QGC. Through the IO Debuging port (after usb pluging) I see the following messeges: [IMG_20190822_113505] through the port FMU debufer [IMG_20190822_113646] Leds of PX following (only blue led is flickers, the …

No activity on IO Debug port for Pixhawk 4 fmu-v5

PX4 Autopilot

JulianOes August 22, 2019, 9:01am 5

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No activity on IO Debug port for Pixhawk 4 fmu-v5

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