Just to check, what firmware version is on the Pucks? It could help to ensure you're on the latest firmware on both of them (although this code should have worked for years)
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.
Just to check, what firmware version is on the Pucks? It could help to ensure you're on the latest firmware on both of them (although this code should have worked for years)