Android Pairing and Bonding

[Rushil]

Every time I want to connect to Nordic ble device from my Phone, it ask for pairing confirmation and then it create bond. That's how it should be.

But if the device is already paired and bonded and I close the Application and reopen it and connect to the same device, it ask for pairing key again.

How to create BLE read, write request from android application to paired and bonded ble peripheral with LTK encryption?

[run_ar]

You should not be asked to create a bond each time you connect to an already bonded device. What SDK version and example are you testing with? What Android version and device are you using?

[Rushil]

It's Nexus 5 with Android 6.0.1. Each time if I restart the application and select bonded device after scanning on the first write or read request, it asks for pin and then it's creating bond again.

I am confused as why each time it is asking for PIN request with already paired and bonded device. This is the same thing happens with my Nordic BLE hardware and Nordic master control panel application.

[run_ar]

What application are you testing with (on the peripheral)? Did you implement the device manager correctly so that bond information is retained between connections? A sniffer trace could also be useful to see what is going on.

[Rushil]

Thanks a lot for help. There was a problem in implementation of the device manager. It works fine now.

[Tanasis!]

@Rushil can you maybe elaborate on what went wrong there? thx!