Does your Pico have a white sticker with a number on top of the processor? You can also getSerial() to return the serial number of your Pico. I'm only speculating but maybe either or both of these could be related to board revision based on @gordon's production records.
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.
Does your Pico have a white sticker with a number on top of the processor? You can also
getSerial()
to return the serial number of your Pico. I'm only speculating but maybe either or both of these could be related to board revision based on @gordon's production records.