https://devzone.nordicsemi.com/f/nordic-q-a/10788/led-interfacehello there i downloaded nRF51_SDK_10.0.0_dc26b5e.and run this example experimental_ble_app_blinky_s110_pca10028. here when i write 1 from master control panel LED turn on or when i write 0 .LED become off. but i want to change it like i want to writeen-USTelligent Community 13Thu, 10 Dec 2015 15:55:11 GMThttps://devzone.nordicsemi.com/thread/40310?ContentTypeID=1Thu, 10 Dec 2015 15:55:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f760fc25-bfa2-4473-b0a9-8dda775fd408Ole Bauck<p>It is the correct function to use. Call</p> <pre><code>led_write_handler(&amp;m_lbs, 1); </code></pre> <p>to turn the led on and</p> <pre><code>led_write_handler(&amp;m_lbs, 0); </code></pre> <p>to turn it off. Actually the function don&#39;t care about the m_lbs so this can also be NULL.</p><div style="clear:both;"></div>