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On button presses, the application wakes up and goes into either 'Connectable mode' or 'Non-connectable mode' based on which button is pressed.įor more information on both modes, see sd_app_evt_wait and the nRF5 Series User Specification (Section: POWER - Power control).

You can refer to the Power Profiling Application example. This sample application starts up, configures wakeup buttons, and enters the System OFF mode. However, system OFF will disable all peripherals except for GPIO, LPCOMP, and NFC, and after waking up the system gets reset.Īnother possibility is to put the system into System ON sleep mode, where the system will wake up on any event, and can be invoked by calling sd_app_evt_wait (). All the peripherals can be used and you can use GPIOTE interrupts to wake it up. Configurations of individual pins are done through the SENSE field in the PIN_CNF register and can be set by calling nrf_gpio_cfg_sense_input (.). The system can be woken up through a DETECT signal generated by GPIO pins. The nRF52840 can be put into System OFF mode by calling sd_power_system_off (), which puts the system to the deepest power-saving mode. NRF_LOG_INFO("BLE Lightbulb Remote Control started.") I found this post but still is not that informative

Any example that would help me get started, I would greatly appreciate it.Where do I place the function for deep sleep in Main.c (see code snippet below)?.It seems like I have to prepare to wake up buttons and turn peripherals off, but how do I do this?.Based on my findings I have the following questions

I have looked around for an example to get started with no luck.But so far I have learned that I can use sd_power_system_off() to put it to sleep. When a button is pushed, then it will connect to the nearby server-peripheral kit and turn the LED on that server.So it is simply that the client will come out of deep sleep only when a button is pushed.

Now I want to put it on deep sleep(SYSTEM OFF) by default. I am using nrf52840 kit, and I have a simple BLE app(client/central that turn LED on to a connected server/peripheral) running on it(sdk 15.3).