This is my first post after browsing many threads and following great community ideas. I'm very glad this community exists and the effort that Victron puts into maintaining and supporting this is just awesome!
Okay, now my issue :-)
I'm running a Raps 3B combined with the Waveshare LTE HAT (SIM7600) with 2.65/2.70 (tried both). It's working out of the box after I adjusted the APN manually. The HAT is getting initialized and recognized properly upon a fresh boot. Since the Waveshare HAT needs some GPIO PINs pulled down or up to get powered up, it looks like VenusOS is taking care of this - which is great.
The problem I face is upon reboot. It looks like when the GPIO UART states remain (HAT keeps blinking) the Raspi gets stuck at the rainbow screen. I can circumvent this by unplugging the USB data cable before rebooting or doing a hard reset by cutting off the power. I also tried messing around with the UART Pins, pulling them up/down when entering reboot init stage, but that does only work sometimes. With a power cycle this never happens.
So, question is. Is there any script which can reset the GPIO UART states to the default before rebooting? Or maybe where can I find the UART settings which are performed upon boot? Any ideas?
Thank you very much.