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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.
@hungryforcodes
Actually, the component that really matters for the Heltec board is bootloader.bin. Get the latest from Travis. It seems to use a different onboard crystal from most modules. Which board are you using from them, the LoRa board, or the "Wifi Kit 32"?