MFRC522 issue with Pico

Sun 2019.02.17

Hi @Michael

Have you tried removing the embedded comment in Line 2 of the test code?

and if lines 4 and 6 are commented out, does the same error occur? (attempting to see if the library even gets loaded without error)

I remember having a similar issue nearly two years ago, and vaguely remember the /*CS*/ may have been the culprit, but can't find my notes. I'll keep looking. . . .

EDIT:
Not in my notes but was part of a post I made. Similar error, not sure if this will solve your issue, just passing info along. Contains battery supply considerations, mfg error code reference links, along with other code snippets.

http://forum.espruino.com/conversations/­299035/

Also, do you have the green KeyStudio variant, or the typical blue circuit card? After two weeks back then, I eventually had to abandon as I had read on other sites, that the KeyStudio board was problematic.