https://devzone.nordicsemi.com/f/nordic-q-a/27688/blinky-bluetooth-nrf51822hi ; I want to control led in my BLE nrf51822 using an android app someone can help me pleaseen-USTelligent Community 13Wed, 29 Nov 2017 11:42:46 GMThttps://devzone.nordicsemi.com/thread/109301?ContentTypeID=1Wed, 29 Nov 2017 11:42:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8c494554-5dd0-40b8-ae03-75357f5c5440Joakim Jakobsen<p>Hi Fares elec!</p> <p>You can use the blinky example in the ble_peripheral folder in our SDK.<br /> The latest version supported for the nRF51822 is <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk/keydef/PLUGINS_ROOT/com.nordic.infocenter.sdk5.v12.3.0/index.html?cp=4_0_5">SDK v12.3.0</a>, and I would recommend using this.</p> <p>When you have flashed the example to your device, make sure it is advertising (LED 1 on).<br /> When the device is advertising, you can use <a href="http://www.nordicsemi.com/eng/Products/Nordic-mobile-Apps/nRF-Connect-for-mobile-previously-called-nRF-Master-Control-Panel">nRF Connect</a> to connect to your device and control LED 3 by writing to the LED Characteristic.</p> <ul> <li>Write 01 to the LED Characteristic and observe that LED 3 is turned on.</li> <li>Write 00 to the LED Characteristic and observe that LED 3 is turned off.</li> </ul> <p>Read more about how to test the example <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.3.0/ble_sdk_app_blinky.html?cp=4_0_5_4_2_2_20">here</a>.</p> <p>Let me know if you have any questions.<br /> Best regards,<br /> Joakim.</p><div style="clear:both;"></div>