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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.
@DrAzzy
Did you remember to do the I2C setup()?
Is it wired up correctly? If you aren't using a breakout board, you need to have the 10k pullups (these are included in I2C breakout boards).
Check talking to it manually, with I2C.writeTo() - check the datasheet for the I2C address to use, and see if it reacts. Some devices may take on an alternate address. Check that too - the module may be trying the other address.
Is the device known working?