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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
... and yes, having a 3bpp arraybuffer graphics would probably be preferable for memory usage and for ensuring a nice clean color mapping.
But doing unaligned 3 bit memory accesses is not super easy (or fast), so right now ArrayBuffer graphics only supports BPPs that are byte-aligned (1,2,4,8,16,24,32).