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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 is a strange one. If I could reproduce here then I might be able to figure out why it's displaying
0x0000[vendor].However you could always get a BluetoothRemoteGATTCharacteristic for another characteristic, could fudge the handle in it to a different value, and could try using that