Telem2 with Pixhawk 2.1 issue

#1

Hi There,

In order for an external computer to talk with the PixHawk 2.1, I setup a connection on Telem2 as it is shown below:

I am using a standard USB2Serial converter and the dongle has been set for 3.3V. when I connect the USB2Serial on the computer, /dev/ttyUSB0 appears, no problem.

on PX4 side, SYS_COMPANION has been set to 921600 bauds

This set up works perfectly well on the Pixracer but with the PixHawk 2.1, I get no transmission from the Pixhawk, i.e. when I launch MAVROS, it is starting and then wait for px4 but there is no response.

Can you tell me what is missing here? Thank you very much for your help

1 Like
#2

What firmware version are you using? Can you please show the output of the following command?
mavlink status

Your wiring looks right

#3

@DanielePettenuzzo I am using the lastest version 1.8.2 I think - same version is used on the PixRacer
I will provide the mavlink status on Monday
Is there any parameter in px4 I need to set besides sys_companion?
Thank you for your support

#4

Not really but when we can see your mavlink status we can at least understand if mavlink is active on that port.

#5

@DanielePettenuzzo
Sorry for my late reply, but actually i found why it was not working. I was using a pin out provided by a documentation but looks like, the pin out was not correct (see pic below). If I follow the pin-out of the pixracer for Telem2, I am able to run Mavros successfully

Best regards

Fabrice

#6

Cool. Glad to here you fixed it.