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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
Ah! In this case I wasn't using the SSD1306 (although I can try that in a bit) but rather the LCD display from the other thread.
Maybe that is the issue? Some sort of stray capacitance or weak pullups from the HD44780 LCD Display ?