implement connection parameters update callback

Author: jefflongo

src/NimBLEServer.cpp

@@ -624,7 +624,12 @@ int NimBLEServer::handleGapEvent(struct ble_gap_event *event, void *arg) {
         // BLE_GAP_EVENT_ADV_COMPLETE | BLE_GAP_EVENT_SCAN_REQ_RCVD
 
         case BLE_GAP_EVENT_CONN_UPDATE: {
-            NIMBLE_LOGD(LOG_TAG, "Connection parameters updated.");
+            rc = ble_gap_conn_find(event->connect.conn_handle, &peerInfo.m_desc);
+            if (rc != 0) {
+                return 0;
+            }
+            
+            pServer->m_pServerCallbacks->onConnParamsUpdate(peerInfo);
             return 0;
         } // BLE_GAP_EVENT_CONN_UPDATE
 
@@ -1088,4 +1093,8 @@ void NimBLEServerCallbacks::onAuthenticationComplete(NimBLEConnInfo& connInfo, c
     NIMBLE_LOGD("NimBLEServerCallbacks", "onAuthenticationComplete: default");
 } // onAuthenticationComplete
 
+void NimBLEServerCallbacks::onConnParamsUpdate(NimBLEConnInfo& connInfo){
+    NIMBLE_LOGD("NimBLEServerCallbacks", "onConnParamsUpdate: default");
+} // onConnParamsUpdate
+
 #endif /* CONFIG_BT_ENABLED && CONFIG_BT_NIMBLE_ROLE_PERIPHERAL */

src/NimBLEServer.h

@@ -205,6 +205,14 @@ class NimBLEServerCallbacks {
      * @param [in] connInfo A reference to a NimBLEConnInfo instance with information
      */
     virtual void onIdentity(NimBLEConnInfo& connInfo);
+
+    /**
+     * @brief Called when connection parameters are updated following a request to
+     * update via NimBLEServer::updateConnParams
+     * @param [in] connInfo A reference to a NimBLEConnInfo instance containing the
+     * updated connection parameters.
+     */
+    virtual void onConnParamsUpdate(NimBLEConnInfo& connInfo);
 }; // NimBLEServerCallbacks
 
 #endif /* CONFIG_BT_ENABLED && CONFIG_BT_NIMBLE_ROLE_PERIPHERAL */