https://devzone.nordicsemi.com/f/nordic-q-a/4835/how-to-use-nrf51-ble-app-uart-static-passkey-with-linuxHi I would like to develop an application for the nrf51822 with a static passkey that connects with linux. The example &quot;nRF51-ble-app-uart-static-passkey&quot; gives a great template for that. However, I couldn&#39;t get it to run with linux and its bluez toolchainen-USTelligent Community 13Thu, 05 Feb 2015 16:39:05 GMThttps://devzone.nordicsemi.com/thread/17086?ContentTypeID=1Thu, 05 Feb 2015 16:39:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:80f19751-1832-4337-8e44-22d999ec0fc4Stian R&#248;ed Hafskjold<p>Try to remove the pairing info first (you may need to apt-get install bluez-tools):</p> <pre><code>bt-device -r &lt;DEVICE_ADDR&gt; </code></pre> <p>Start bluez-simple-agent in another terminal window. It should respond with &quot;Agent registered&quot;. Leave it.</p> <pre><code>bluez-simple-agent </code></pre> <p>Start gatttool:</p> <pre><code>sudo gatttool -b &lt;DEVICE_ADDR&gt; -t random -I </code></pre> <p>In gatttool set high security level:</p> <pre><code>sec-level high </code></pre> <p>Connect:</p> <pre><code>connect </code></pre> <p>Now simple-agent should ask for a passkey in the other terminal window.</p><div style="clear:both;"></div>