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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.
@user157904
I have just opened the heater controller and despite the manual saying it has an HC-05 module, it actually has a DX-BT18 module which I believe does have BLE. Do you know whether I would be able to connect to this using the MDBT42Q?