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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
That all sounds promising - you definitely need to adjust contrast such that you see the line of black rectangles though.
LCD.writeis for individual characters - so I wouldn't really expect you to see much there.LCD.printshould work though.If setting the cursor is working (but not text), I'm really not sure what to suggest - especially if the cursor appears in the right place.
All I could think is maybe you should re-check the wiring of the data pins. It might be they are in the wrong order or one of them isn't connected.