nRF52832 "ble_peripheral-ble_app_uart" stops working

Question

Hello, 
 
 I am trying to evaluate the "ble_app_uart" in the "nRF5_SDK" and I am using "DVK-BL652-SA-01" development board from LAIRD. 
 The example works fine for a while. After some time, the application stops working. I can not even see the BLE device with my phone. 
 What could be the problem ? Any idea ? 
 
 Best Regards

Edvin · Accepted Answer

Hello, 
 (dec) 8198 = 0x2006 = NRF_ERROR_SOC_POWER_OFF_SHOULD_NOT_RETURN. 
 
 This happens because the function sd_power_system_off should not return. When you are in debug mode, it will actually be in a simulated system off state, and this function call may return, and it will return NRF_ERROR_SOC_POWER_OFF_SHOULD_NOT_RETURN. 
 
 Please see the response in this case for some more detailed information. 
 
 This leads back to my questions, what SDK and SoftDevice versions do you use? And are you in a connection when this happens, or are you advertising? I suspect this happens when you are advertising, and the advertising timer times out, calling the sd_power_system_off() function, turning off the chip to save power. Try to either extend your advertising timeout, APP_ADV_TIMEOUT_IN_SECONDS, or comment out the sd_power_system_off() call, or the sleep_mode_enter() call, which is the one calling sd_power_system_off(), and see if the issue disappears. 
 
 Best regards, 
 Edvin

nRF52832 "ble_peripheral->ble_app_uart" stops working

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