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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
Sorry, that's my fault for some bad example code. Glad you got it sorted with requestDevice.
One thing I do notice is you do
sendMessage("Hello, Arduino!/n");which I assume is to send a newline, but the slash is the wrong way around so it'll just send/nand not a newline.So you could try
sendMessage("Hello, Arduino!\n");and see if that helps?