There is a couple of ways to flash firmware. I think now we have to use the method here: https://www.espruino.com/Firmware+Update#android-ios-app
@Ganblejs started
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.
There is a couple of ways to flash firmware. I think now we have to use the method here: https://www.espruino.com/Firmware+Update#android-ios-app