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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
You're not doing anything wrong - these are warnings because the Bluetooth LE support on ESP32 is currently a work in progress. It may still be working regardless though.
If you want proper reliable Bluetooth LE support at the moment, please buy one of the official Bluetooth Espruino boards like:
Some people say 'they don't have WiFi'. You can connect a $3 ESP8266 ESP01 WiFi module to any of those boards with 4 wires and get WiFi.