nrf51822 BLE connection issue

[prasanna]

Hello, We have a setup where we connect an nrf51822 and an iphone.The nrf51822 connects to the iphone, notifies the data and disconnects roughly every minute.(This is done to save battery).Default battery capacity this way is roughly 9 days.

Now, we took the nrf51822 out of range for around 7 days and brought it back,there is no advertisement. We've looked up issues with watchdog,battery and these seem to be work fine.

Have people faced issues where stack failed and app_error did not get called ?? Or any particular scenario where sd_app_evt_wait() failed ??

I am out of ideas here, so any obscure ones will also help.Thank you.

SDK Version: nRF51_SDK_8.1.0

bootloader Version: dfu_dual_bank_ble_s110_pca10028.hex

soft Device: s110_nrf51_8.0.0_softdevice.hex

MCP Version: 3.10.0.14

[MartinBL]

1. Are you saying that the battery still has a sufficient voltage to power the nRF51 after the 7 days?
2. I suppose you have some sort of mechanism to connect and disconnect the devices every minute? Is it possible that the nRF51 keeps trying to connect and that this results in an error handler or a drained battery?
3. Have you defined DEBUG in your application? If so your application might end up in an endless while loop on errors or asserts.