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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.
@parasquid
Which pins are you using the I2C on? There was a similar issue that was solved via using Software I2C http://forum.espruino.com/comments/15558111/
If it's just an SSD1306 then it should be fine to use software I2C
If you need hardware I2C you can use I2C2 on b3 and b10