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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.
Hi! I've noticed that (I think) the Bangle Beta devices must have a slightly different LCD than my development device, and the Gamma/contrast is way off.
Try:
You'd hope it was a smooth gradient, but it's probably not. I did some hacking around and got:
But if anyone feels like poking around and trying to get it better, feel free!
Issue here: https://github.com/espruino/Espruino/issues/1758
Screen datasheet here: https://www.newhavendisplay.com/appnotes/datasheets/LCDs/ST7789V.pdf
It's the PVGAMCTRL register than needs tweaking, but there's very little info on what the values mean!