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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 connected to the band when you see that. It's not something that is being advertised...
Flower care works because it advertises the data.
You can set up EspruinoHub to get the data via https://github.com/espruino/EspruinoHub#connections but it will be connected to the watch band constantly and so won't be able to scan for other advertisements.
When you look in the
Scanningtab of nRF Connect do you see any data that could be heart rate? If so maybe screenshot that, and I can show you how to add it.