This was driving me nuts all evening, and I just wanted to throw a reminder out there to anyone that might be having issues with connecting an external GPS to the navio2 UART port. I’m not sure if there’s a better way to do this, or if this is something that Emlid can work into the image file… but I cursed the bloody buggered hell out of my project until I re-stumbled upon this one. Nevertheless, once I changed “enable_uart=0” in /boot/config.txt to “enable_uart=1” the GPS started working like a charm!
"This issue is that when you disable the serial port for boot using raspi-config, the serial port is also disabled for ANY use.
To fix this you MUST set “enable_uart=1” in /boot/config.txt
This is really a bug in raspi-config."
I honestly had no idea, and disabling the serial console had become a habit developed years ago with other Raspberry Pi projects. For me, going into raspi-config is always my first step after a fresh install so as to expand the file system; while in there, why not disable the serial console? Anyway, it’s been months since I had bothered with this project and I had forgotten most the fine details of my previous builds