Can you confirm which version of espruino you're using on which board?
What is the value of the pull-up resistors you have connected to the two i2c lines?
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.
Can you confirm which version of espruino you're using on which board?
What is the value of the pull-up resistors you have connected to the two i2c lines?