https://devzone.nordicsemi.com/f/nordic-q-a/9608/how-to-enter-in-sleep-mode-and-wackup-again-without-advertizing-modei have use nrf51822 when no connection creat between android nrfUart app and backon kit so autometically sleep in 180 seconds, but i have need sleep condition in connected mode of bacon kit and android app.. when i have press switch so bacon kit willen-USTelligent Community 13Thu, 08 Oct 2015 12:59:02 GMThttps://devzone.nordicsemi.com/thread/35504?ContentTypeID=1Thu, 08 Oct 2015 12:59:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6a65734e-2efb-434e-84d1-cba15c32a350Susheel Nuguru<blockquote> <p>when i have press switch so bacon kit will be wackup</p> </blockquote> <p>you can use the app_button module in SDK for this. Documentation can be found <a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk51.v9.0.0%2Flib_button.html&amp;cp=4_1_0_3_5">here</a></p> <blockquote> <p>and transmitt this data at connected device</p> </blockquote> <p>when your button_event_handler that you gave in app_button_init gets triggered after you press the button, then you can handle the connection and start the data transfer</p> <blockquote> <p>And get sleep condition after transmition complet</p> </blockquote> <p>Just call the power_manage() function from SDK for the system to go to sleep after your transfer is complete.</p><div style="clear:both;"></div>