2021-11-26, 10:26 AM
(2021-11-26, 04:19 AM)MacleayIslandBruce Wrote: The arduino board is connected to RPi4 serial port, physical pins 8, 10 (GPIO14, 15), this was working on old RPi3 with older opencpn/pypilot. This is not working on the RPi4 on the GPIO pins but does work via USB, the run between boards is longer than I would like to run a USB cable, I would prefer to use a serial connection but cannot get it to work.
You have dtoverlay=disable-bt in your /boot/config.txt, otherwise the bluetooth adapter is hogging the uart?