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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.
@Gordon
Ahh, and I just realised - the module itself that you copied that code from is perfectly JS compliant and fine.
The problem is that
Graphics.bufferis anArrayBuffer(so untyped). You replaced it with aUint8Array:)