https://devzone.nordicsemi.com/f/nordic-q-a/1957/ancs-with-nus-on-nrf51822I saw an ANCS examples in sdk5.1.0(softdevice=6.0.0), and then I put this example to port to sdk4.4.2 (softdevice=5.2.1) and the example worked perfectly. But when I put the case into a complex project including many services, ANCS is not working properlyen-USTelligent Community 13Fri, 21 Mar 2014 15:58:38 GMThttps://devzone.nordicsemi.com/thread/8414?ContentTypeID=1Fri, 21 Mar 2014 15:58:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ee7dffef-bdd9-40e7-b172-435bd4bbdd79Ole Morten<p>All ATT Error codes are defined in ble_gatt.h, and as you can see there, 0x010A is BLE_GATT_STATUS_ATTERR_ATTRIBUTE_NOT_FOUND. This means that the GATT Client can&#39;t find the ANCS service in the attribute table of the iPhone. I&#39;ve seen this happen right after the iPhone has been restarted, but I wouldn&#39;t expect this to happen when the iPhone is already running. Also, which iOS version do you run on your phone?</p> <p>However, beware that it will not be possible to implement a complete ANCS client with S110 version 5.2.1, primarily becaues it doesn&#39;t support doing Long Write as a GATT Client, and this is required to do the Get App Attributes command. This is not yet implemented in the ANCS example of the SDK, but will probably be in future releases.</p><div style="clear:both;"></div>