Customized BLE service: fail to connect with mobile phone using nRF Connect mobile app

RE: Customized BLE service: fail to connect with mobile phone using nRF Connect mobile app

ychen25 — Mon, 07 Apr 2025 22:09:01 GMT

This solved my problem. Thank you so much Kenneth.

Previously I flashed a CGMS sample project and used nRF toolbox app to connect with the development board. I didn't realize that it also created an item in my bluetooth device list. Later I flashed my customized project and tried to use nRF Connect app to establish connection and failed.

I'm thinking that I'm not the first person who have tried these series of operations and encountered this problem. I would suggest Nordic can better coordinate the two mobile phone apps in later development. Many thanks!

RE: Customized BLE service: fail to connect with mobile phone using nRF Connect mobile app

Kenneth — Mon, 07 Apr 2025 21:26:50 GMT

Hello,

This is security related, so if you eraseall/recover the nRF54L15 and then indirectly erase bonding information, then the nRF54L15 no longer have a bonded relationship with the peer device. If the peer device (e.g. phone) then connect, and find keys are lost (e.g. pairing/bonding information removed), then the phone will disconnect as precaution to avoid any hijacker trying to connect. The only way to solve this is to go to settings on the phone, and delete the specific device from the Bluetooth list, and then bond again.

Kenneth