Hey @sfeldma, from your last message, your sudo pon command returned that /dev/ttyUSB3 is not being recognized…
Your ls /dev/ttyUSB* is returning /dev/ttyUSB0, /dev/ttyUSB1 or /dev/ttyUSB2 so there’s only those options that that you can apply in your specific case.
To make sure you’re using the correct one, I’d recommend sending AT command which should return OK if the connection with the module is correctly established.
To be clearer:
- Follow the Sending AT Commands guide and send the command
ATto any of the 3/dev/ttyUSBports and if you seeOKbeing returned then you can use that port for your comfguration.
Hope this helps! FYI, I’m not part of the Sixfab team, just a customer also struggling to get my HAT working with my module and only sharing what I’ve learned during that experience 