Trying to communicate to with a password protected Ble Device

i am facing a "Not connected" error (caught after get primaryService method)

Argh, thanks for the update! Yes, if it's related to signal strength issues then that could be quite problematic. The original Bangle.js signal strength is fine to a phone in your pocket, but it's not that strong - and there's not much you can do in software to work around that :(

The change on the bangle did not have visible effect.

The default for the Bangle is already the highest (4 dBm) - so that could be why?