I've found it very hard to get any useful code running on an Espruino micro:bit, once a module or two is required. The one thing I really worked on was advertising temperatures from some DS18B20 probe on BLE. Absolutely couldn't get it to fit, even with manual stripping and minification of the DS18B20 module.
Of course I could just use one of my precious Pucks, but it'd be a waste... they're overkill and I've got three or four spare micro:bits I'm not using. However, I'm just going to use a few bare ESP32 modules instead.
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