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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.
@fanoush
Hard to guess without seeing the code. When in WebIDE you may dump the Graphics object via oled.dump() method (it will show as picture in the IDE) so you can make sure the framebuffer data is OK (and e.g. width is really 64, not more), then if data is OK it is either in flip command sending (too many or too few?) data or can be also in display initialization.