You are reading a single comment by @Gordon and its replies.
Click here to read the full conversation.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
MISO stands for 'master in slave out' - so it's nice and easy - MISO always connects to MISO, and same for MOSI and SCK.
The fact that you're getting an Error 2 makes me think communications are more or less working - if there's a problem you usually get 0 or 255.
Could you check that you really have connected the board to 3.3v on the Pico, and not to the 5v output? I came across someone having a very similar issue before, and it was because they were putting too much power on the board.