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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.
@pdominique
Ok it's probably the LED pin then. Your second example (paletted mode) doesn't seem to use this pin so I just assumed it was useless. :-)
I just tested the LCD on my Pi and it works so at least I know I have a working unit. The brightness is terrible though, I'm wondering if I somehow killed the backlight by using 5v instead of 3.3v. Is that even possible with a Pico?