Still have the issue. Indeed, with my (old) smartphone, there is no “nearby device” in application authorisation panel. I’m in touch with M. Lefebure. He will try to investigate what’s wrong with my old versions of Android (10 and 8.1.0). I tried to install the old version of Lefebure that you provide. It’s OK for BT but it don’t want to connect to caster.
The old version has a complete bt menu for connection options…
As Ryan suggested here U can connect bt_le to Gnss and leave the bt_spp for another device.
p.s. check the pwd , must still work.
After contact with M. Lefebure, he is providing a beta version (2026-05-07) that is solving BT issue on my two smartphones.