Waveshare RP2040-Tiny fails

Community General Discussion
1

Hi,
I've been developing a simple HC12 relay (one ch to another) using the RP2040-Tiny and all was going well until the board just stopped communicating via COMx: I tried 2 others, and only one works; this is on both PC and laptop.
I wonder if the issue is IDE related? I ask this as strange things started happening with the program libraries just before the COM port failure, with a previously near-finished code throwing up random errors re scope and such - without my having done anything to cause such errors.
I have tried different cables, and tried doing the UF2 wait(. . . . .), nothing. If the board works, it works, but if not - crickets.

Has anyone else met this issue, and was there a solution?

2

Not enough info. Post all your code in code tags. Do a hand drawn wiring diagram and post a photo of it.

3

Hi @OldManNoob.

I'm not sure I understood correctly what you mean by "stopped communicating". Please provide a more detailed description of what you mean in a reply on this forum topic to help us to understand it.

When one of the non-functional boards is connected to your computer with a USB cable, do you see a port for the board in Arduino IDE's Tools > Port menu?

4

Oops - I thought I was clear.
My IDE sees no com port, and the Device Mgr sees no com activity other than com1. The USB popup states that the device(s) fail or are unrecognised.
I can force UF2 visibility - but can get no further.