https://devzone.nordicsemi.com/f/nordic-q-a/51619/i-can-t-figure-out-how-to-read-changes-in-ble-attributes-central--peripheral-basic-questionHi, I&#39;ve completed the first 3 BLE tutorials (about advertising and Services). I&#39;ve got notifications up and running on the peripheral by using a timer and hvx as in the attribute tutorial. What i now whant to do is read from another attribute,en-USTelligent Community 13Mon, 02 Sep 2019 13:33:12 GMThttps://devzone.nordicsemi.com/thread/207424?ContentTypeID=1Mon, 02 Sep 2019 13:33:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:92878cc0-77f9-43ed-99e6-18134715d31bRSA<p>I ended up following this application note <a href="https://infocenter.nordicsemi.com/pdf/nan_36.pdf?cp=11_2">https://infocenter.nordicsemi.com/pdf/nan_36.pdf?cp=11_2</a></p> <p>Im now using the&nbsp;BLE_GATTS_EVT_WRITE events to notify when something is written to the characteristic. The application is supossed to be a proof of concept (leaning the API and so on). I suggest adding the application note to the end of the mentioned tutorial</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/207390?ContentTypeID=1Mon, 02 Sep 2019 12:08:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:61d16579-f4b8-4c7b-8082-eed5dfe05ffdAmanda Hsieh<p>Hi RSA,&nbsp;</p> <p></p> <p>May I know what is your purpose for the application code? <a href="https://www.youtube.com/watch?v=uP8RYgYGRvI">Have you tried debugging your application?</a></p> <p>There is the&nbsp;<a href="https://devzone.nordicsemi.com/nordic/short-range-guides/b/software-development-kit/posts/application-timer-tutorial">nRF5 SDK Application Timer Tutorial</a>&nbsp;that might help you.&nbsp;</p> <p></p> <p>-Amanda H.&nbsp;</p><div style="clear:both;"></div>