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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
Do you know (maybe from the adafruit app, or the NRF connect app) what the device's MAC address is? That way you can at least try and track down which the correct device is - or you can even just specify it manually using the MAC address.
In what you posted all I see is
"manufacturer": 76,- these are all Apple devices, so not your Feather BLE.Could you feather still be connected by BLE to your phone/PC? If so it won't be advertising.