Patrick

It is really a strange behavior and unfortunately I don't have an ARMv7 to make some test myself it will be really difficult to find out what's going on

I've an ender3v2 with the same motherboard and the only issue I had was because I was using a splitter and, while I was connecting to the printer with one...

I think your cable is not the right one, try to connect the one that now is connected to the printer to your phone and from the usb type A...

Unfortunately I don't have experience with micro USB OTG cable but I think if you search for one in internet it should go auto with a micro usb male from...

Hi, how did you connected your phone to the printer? Are you charging the phone while it's connected to the printer? if so, how are you doing it (wirelessly or...