https://devzone.nordicsemi.com/f/nordic-q-a/15518/couldn-t-disconnect-from-the-device-when-use-the-nrf5-iot-sdkenv: nrf5 iot sdk/ tcp examples follow the file:&quot; nrf5_iot/documentation/html/a00089.html&quot; problem: echo &quot;connect 00:0C:B7:6B:62:2B 1&quot; &gt; /sys/kernel/debug/bluetooth/6lowpan_control //success But, echo &quot;disconnect 00:0Cen-USTelligent Community 13Thu, 04 Aug 2016 02:15:00 GMThttps://devzone.nordicsemi.com/thread/59267?ContentTypeID=1Thu, 04 Aug 2016 02:15:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a6865bd4-b323-4071-83b6-15f00294cabbdanielkelly<p>still error, But by using</p> <pre><code> echo &quot;disconnect 00:0C:B7:6B:62:2B 0&quot; &gt; /sys/kernel/debug/bluetooth/6lowpan_control </code></pre> <p>it worked.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/59266?ContentTypeID=1Wed, 03 Aug 2016 13:01:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:adc1d426-d514-4cf1-b5fd-f0f79eb7cf1dOle Bauck<p>Try with</p> <pre><code> echo &quot;disconnect 00:0C:B7:6B:62:2B 1&quot; &gt; /sys/kernel/debug/bluetooth/6lowpan_control </code></pre><div style="clear:both;"></div>