Not sure if its a useful information, but when my BangleJs boots I can see the message "-> Bluetooth"
Yes, that's hugely useful. Usually, what that means is Bangle.js is being connected to by another device.
I think given you just installed Gadgetbridge, what I'd suggest is you go into Gadgetbridge and see what is says next to your Bangle. If it says 'connected' long-press on it in Gadgetbridge and it should disconnect - you can then connect to other devices just fine.
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.
Yes, that's hugely useful. Usually, what that means is Bangle.js is being connected to by another device.
I think given you just installed Gadgetbridge, what I'd suggest is you go into Gadgetbridge and see what is says next to your Bangle. If it says 'connected' long-press on it in Gadgetbridge and it should disconnect - you can then connect to other devices just fine.