nRF52 DK PCA10040 BLE unable to establish a connection

[Sam]

Hi, I have been developing with the nRF52 DK for the past couple of months however I have encountered an issue today which I am unable to resolve.

I am unable to establish a BLE connection, at first I attributed the problem to my code however after flashing some of th examples the issue still persists. The device is advertising however a connection cannot be established. I have been using the nRF Toolbox app, the device appears in the scan but once selected rapidly disconnects. When interrogating the device using LightBlue LED1 flashes eratically.

I have erased the device using nRFgo studio and reflashed the softdevice several times. Non-BLE examples work fine, I have verified the board operation using the bsp example and a UART connection.

Any suggestions regarding what else I could try? Perhaps it is a hardware problem?

[Stefan Birnir Sverrisson]

Hi Sam

Perhaps the problem is on the phone side. Try resetting the phone and try again. That will surely erase all cache GATT tables from the phone and reset the Bluetooth hardware. Usually it works also to go to bluetooth settings, forget all bonded devices and/or disable bluetooth and enable it again. The last approach is though to reset the phone if nothing else works.

[Sam]

Hi Stefan, I was unable to establish a connection in any example. I have now acquired a new NRF52-DK V1.1.0 which has resolved my problems. I believe the hardware may have been damaged in some way and that was the cause of my problem.