https://devzone.nordicsemi.com/f/nordic-q-a/23493/is-there-anything-wrong-with-my-value-characteristic-initiation-functionHello, please refer to the below code, in particular, did I get the cccd handle right? static uint32_t mesh_value_char_add(void) { /* BLE GATT metadata */ ble_gatts_attr_md_t cccd_md; memset(&amp;cccd_md, 0, sizeof(cccd_md)); BLE_GAP_CONN_SEC_MODE_SET_OPENen-USTelligent Community 13Fri, 14 Jul 2017 13:32:06 GMThttps://devzone.nordicsemi.com/thread/92276?ContentTypeID=1Fri, 14 Jul 2017 13:32:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:20b6fb19-72a8-40d5-bcf7-a2f1f10df890bjorn-spockeli<p>Hi Mitch,</p> <p>take a look at <a href="https://github.com/bjornspockeli/custom_ble_service_example">this</a> tutorial, it shows how you create a custom BLE service and add a characteristic with the read, write and notify properties.</p> <p>Specifically, take a look at custom_value_char_add() in <code>ble_cus.c</code>, <a href="https://github.com/bjornspockeli/custom_ble_service_example/blob/master/ble_cus.c">here</a> is the link.</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>