having multiple Bluetooth connections would be really sweet
Bangle.js does support multiple central connections now (eg for a bluetooth ECG and a bike speed sensor).
The smartphone disconnection thing is a pain though - are you using Android? I'd been considering adding the ability to forward the bluetooth connection from the phone to a PC (like we do for https://www.espruino.com/ide/relay/), so that could solve that problem quite nicely
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.
Bangle.js does support multiple central connections now (eg for a bluetooth ECG and a bike speed sensor).
The smartphone disconnection thing is a pain though - are you using Android? I'd been considering adding the ability to forward the bluetooth connection from the phone to a PC (like we do for https://www.espruino.com/ide/relay/), so that could solve that problem quite nicely