I have connected an ODROID to a Pixhawk Mini via it's TELEM port (FTDI cable). I followed this c_uart_interface_example and verified that it did indeed work with my connection.
On the ODROID's end
Now I am trying to send my custom mavlink message. I added my message to the common.xml file and regenerated it (note that I would get an error as described here, unless I unchecked 'Validate', which I did).
I edited the c_uart_interface_example to send my message, which it seems to be doing.
On the Pixhawk Mini's end
I updated mavlink/v2.0 to include my custom message header.
I created a uORB topic (there shouldn't be any source of error here because I have tested subscribing/publishing using it within the PX4 firmware without issue).
I followed all the steps here on receiving custom mavlink messages.
Where I subsribe to the uORB topic, in a custom controller module, nothing is being read (unlike when I was using the uORB topic within the PX4 firwmare, i.e. without mavlink or the ODROID). It seems my message is not being received, but I have no idea why not.
Have I missed any steps? Is there anything special that needs to be done on the ODROID's end that wouldn't have been covered in that