unable to go into UART interrupt after 6 minutes running

[sunnyjet16]

Hello,

I am using nrf51822 doing projects. I met an issuse which is that at the first 6 minutes, it can normaly go into UART interrupt and run subroutine successfully. But after 6 minutes running, it can not go into UART interrupt again. I use Keil uVersion 5 to compile and debug. I would like to know some information as below:

1. How can I check the parameters about UART configuration when the issue happened.
2. what approaches I can employ to find the root cause?

Regards Alex

[Ole Bauck]

Do you go to system OFF mode for example with sd_power_system_off()? The examples do this by default after 3 minutes (APP_ADV_TIMEOUT_IN_SECONDS).