How can I use the NRF51 SDK-12.3 nrf_pwr_mgmt example with the BLE stack?

Question

Hi. 
 We are developing with the nRF51 series and creating data loggers of various types. We would like to combine features of the nrf_pwr_mgmt example with firmware that uses UART and the BLE stack. We don't know how to get the chip to sleep either with or without System_Off (tried several things without success). It seems like the BLE stack is already sleeping between advertisements, but we would like to go into System_Off after initial configuration to shelve the part until shipping, and enable a single push button interrupt to restore the running/configured state. Please outline how one would convert the BLE-UART example of SDK-12.3 to one with power management, and using only a single button. 
 Developing with Keil uVision V5.3.0 on the nRF51 DK board PCA10028. 
 Thanks! 
 Steve

Vidar Berg · Accepted Answer

Steve, 
 1. Both methods end up calling sd_power_system_off() in the end. The difference is that the power management module provides the shutdown callback and a Shutdown retry mechanism ( link ) you can enable through sdk_config.h. 
 2. It was not necessary to replace the sleep_mode_enter() call in bsp_event_handler(), but I assumed the goal was to integrate the power management module with the example, so that's why I did it. I should probably have replaced the other calls to sleep_mode_enter() to make this clearer. 
 Vidar 
 edit: added missing link to documentation.

How can I use the NRF51 SDK-12.3 nrf_pwr_mgmt example with the BLE stack?

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