• Which wires do you have connected? Just:

    • 3.3v -> B3
    • B6 -> B7
    • B7 -> B6

    Do you have ground connected between the two Picos as well?

    If you don't, it's possible that could be causing your problems I guess?

  • Which wires do you have connected? Just:

    3.3v -> B3
    B6 -> B7
    B7 -> B6

    Yes - that's all.

    Do you have ground connected between the two Picos as well?

    Ah - I don't, no. I'll give it a try - thanks!

    Edit: That seems to have fixed it - many thanks! Not knowing much about electronics that was seriously confusing the hell out of me - clearly I need to read up a lot more to get my head around more of these basic concepts. Thanks again!

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