I have 2 working luckfox cards, I can login into them with SSH and work just fine with ttyS3 and ttyS4, however for some reason I am getting garbled data on serial debugging, I have the correct baud rate and serial parameters. To note that it was working before but now it has stopped working: ▒▒▒0▒▒...

Hey, for my application I need at least 3 USB ports, is it feasible to add more USB ports via the pins for the luckfox pico mini b? Does it support multiple USBs? If yes how can it be done?