Tricky question, but I’m sure someone must have had the same problem.
I’ve got two devices which I’m trying to run in a paired configuration. The idea is to update one device, and if that fails, use the second device to connect in via the serial port and restore access. This works fine for the most part, but there is a problem with the serial link on reboot.
On reboot, both devices send information to the serial on boot up. They then interpret this as a request to interrupt the boot sequence, and so the network doesn’t come back.
Only an issue if both devices are powered on at the same time, but that’s not an uncommon use case.
Any ideas?