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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.
@Wilberforce
If the puck is paired, it doesn’t advertise any more. So if one device is auto connecting- they will stop it. And pulling the battery it might auto connect on re-power up. So turn off Bluetooth on all devices you have connected to.
For the boot loader mode it needs to be a particular length of time to hold the button down - it’s a kind of tricky timing thing.