I worked several years ago to android an Bluetooth so my knowledge on android is quite old. I would like to have application XYZ able to connect to nearby application XYZ over Bluetooth or also BLE if useful. Example in the image below. One device would be able to star discovery process and display possible connections only if other devices has application installed (also if is not active, just installed).
- Is this discovery mode possible also when application on other device is not active (maybe some background process can be running)? (any link ref will be appreciate)
1.1) additionally if is possible during the discovery phase is possible to pass some additional information like a username set by other application? (when connection is established yes, I meen in advance)
Thank you for any answer.