https://devzone.nordicsemi.com/f/nordic-q-a/78361/nrf-toolbox-connection-failedI&#39;m a beginner in BLE applications, and I&#39;m having trouble with connecting nRF toolbox application I wanted to use UART function provided in nRF toolbox. But, an e rror message &quot;The device has not have required services&quot; is shown, when I try to makeen-USTelligent Community 13Mon, 09 Aug 2021 11:21:10 GMThttps://devzone.nordicsemi.com/thread/323976?ContentTypeID=1Mon, 09 Aug 2021 11:21:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e4ee9c0b-3c34-4f12-8e9c-ecb332ba96aaAmanda Hsieh<p>Hi,&nbsp;</p> [quote user=""]<p>But, an e<span>rror message &quot;The device has not have required services&quot; is shown, when I try to make connection with nRF toolbox</span></p> <p><span>The device is well connected with&nbsp;<em>nRF connect</em>&nbsp;app, and scanning the BLE signal is fine</span></p>[/quote] <p>Are you using SDK or NCS? What is the version number?</p> <p>Are you using a sample or custom project? If it is a sample, what is it?</p> <p>Does it also happen to the unmodified BLE UART example?</p> <p>-Amanda H.</p><div style="clear:both;"></div>