Can connect but no response

Have you ever had a connection to it? Did you maybe pair from your OS bluetooth window?

• Are you still connected to the Bangle from another PC/Phone? Gadgetbridge on Android as well as iOS ANCS will keep a connection open which will stop you connecting from other devices until you manually disable it.
  
• Did you connect to the Bangle from your OS's Bluetooth menu? (Android, iOS, MacOS, Windows, etc) If so, try 'unpairing' and then try connecting again but from the App Loader.