can not connect nrf52 board after unpair

[huaminhtuan]

Hi Nordic,

I am using PC10040 board for my project. I want to connect the board with my Android phone without using Nordic app. Can you give me an advice?

I have also tried ble_app_uart example. It worked well. Then I try to connect the board to my phone without using Nordic app, it can be connected for the first time. After that, I unpaired it, and I can not repair it anymore. It show the message "Unable to communicate with ". Can you help me please?

Thanks for reading.

[Joakim Jakobsen]

Hi Huaminhtuan!

Are you using the ble_app_uart example when connecting your phone with the Nordic app? And are you using the same example when not using the Nordic app?

How are you connecting your phone to the nRF52 DK without using the Nordic app?

[huaminhtuan]

I'm sure that I had disconnected from Nordic app before I tried to connect to my mobile phone. I tried connecting my phone to the nRF52 DK using bluetooth on my phone, but it didn't work.

[Joakim Jakobsen]

Did you try to connect your phone using the ble_app_uart example, and the nRFConnect app?

[huaminhtuan]

After a lot of searching, I recognized that I have to flash soft device again after I unpair the device. I don't know the reason but I hope this information will be helpful to the others.