Improve Zigbee network startup

In some setup the initial network formation fails due interference which
results in 'Not In Network' state. This commit will attempt to reconnect
the network repeadedly.

If the user requests to Leave the network the process is paused until Join
is clicked again.

database.cpp

@@ -963,7 +963,8 @@ static int sqliteLoadConfigCallback(void *user, int ncols, char **colval , char
     }
     else if (strcmp(colval[0], "rfconnect") == 0)
     {
-        if (!val.isEmpty())
+        // only reload from database if auto reconnect is disabled
+        if (!val.isEmpty() && deCONZ::appArgumentNumeric("--auto-connect", 1) == 0)
         {
             int conn = val.toInt(&ok);
             if (ok && ((conn == 0) || (conn == 1)))

de_web_plugin.cpp

@@ -14152,6 +14152,12 @@ void DeRestPlugin::idleTimerFired()
 
     if (!d->isInNetwork())
     {
+        // automatically try reconnect network
+        if (d->networkState == DeRestPluginPrivate::MaintainNetwork && d->gwRfConnectedExpected)
+        {
+            d->networkConnectedBefore = d->gwRfConnectedExpected;
+            d->startReconnectNetwork(RECONNECT_CHECK_DELAY);
+        }
         return;
     }
 
@@ -16037,11 +16043,6 @@ void DeRestPluginPrivate::pollDatabaseWifiTimerFired()
 
 void DeRestPluginPrivate::restartAppTimerFired()
 {
-    reconnectTimer = new QTimer(this);
-    reconnectTimer->setSingleShot(true);
-    connect(reconnectTimer, SIGNAL(timeout()),
-            this, SLOT(reconnectTimerFired()));
-
     // deCONZ will be restarted after reconnect
     genericDisconnectNetwork();
 }
@@ -16182,7 +16183,7 @@ void DeRestPluginPrivate::pollNextDevice()
  */
 void DeRestPluginPrivate::genericDisconnectNetwork()
 {
-    DBG_Assert(apsCtrl != 0);
+    DBG_Assert(apsCtrl != nullptr);
 
     if (!apsCtrl)
     {
@@ -16225,7 +16226,7 @@ void DeRestPluginPrivate::checkNetworkDisconnected()
         }
         else
         {
-            DBG_Assert(apsCtrl != 0);
+            DBG_Assert(apsCtrl != nullptr);
             if (apsCtrl)
             {
                 DBG_Printf(DBG_INFO, "disconnect from network failed, try again\n");
@@ -16244,6 +16245,14 @@ void DeRestPluginPrivate::checkNetworkDisconnected()
  */
 void DeRestPluginPrivate::startReconnectNetwork(int delay)
 {
+    if (!reconnectTimer)
+    {
+        reconnectTimer = new QTimer(this);
+        reconnectTimer->setSingleShot(true);
+        connect(reconnectTimer, SIGNAL(timeout()),
+                this, SLOT(reconnectTimerFired()));
+    }
+
     networkState = ReconnectNetwork;
     DBG_Printf(DBG_INFO_L2, "networkState: CC_ReconnectNetwork\n");
     networkReconnectAttempts = NETWORK_ATTEMPS;
@@ -16309,7 +16318,8 @@ void DeRestPluginPrivate::reconnectNetwork()
     }
     else
     {
-        DBG_Printf(DBG_INFO, "reconnect network failed\n");
+        DBG_Printf(DBG_INFO, "reconnect network failed, try later\n");
+        networkState = MaintainNetwork;
     }
 }
 

de_web_plugin_private.h

@@ -1018,6 +1018,7 @@ public Q_SLOTS:
     void gpDataIndication(const deCONZ::GpDataIndication &ind);
     void gpProcessButtonEvent(const deCONZ::GpDataIndication &ind);
     void configurationChanged();
+    void networkStateChangeRequest(bool shouldConnect);
     int taskCountForAddress(const deCONZ::Address &address);
     void processTasks();
     void processGroupTasks();
@@ -1614,14 +1615,15 @@ public Q_SLOTS:
     uint8_t channelChangeApsRequestId;
 
     // generic network reconnect state machine
-    enum networkReconnectState
+    enum NetworkReconnectState
     {
         DisconnectingNetwork,
-        ReconnectNetwork
+        ReconnectNetwork,
+        MaintainNetwork
     };
 
-    QTimer *reconnectTimer;
-    networkReconnectState networkState;
+    QTimer *reconnectTimer = nullptr;
+    NetworkReconnectState networkState = MaintainNetwork;
     int networkDisconnectAttempts;
     int networkReconnectAttempts;
     bool networkConnectedBefore;

rest_configuration.cpp

@@ -231,6 +231,11 @@ void DeRestPluginPrivate::initConfig()
 
     connect(deCONZ::ApsController::instance(), &deCONZ::ApsController::configurationChanged,
             this, &DeRestPluginPrivate::configurationChanged);
+
+#if DECONZ_LIB_VERSION >= 0x010C00
+    connect(deCONZ::ApsController::instance(), &deCONZ::ApsController::networkStateChangeRequest,
+            this, &DeRestPluginPrivate::networkStateChangeRequest);
+#endif
 }
 
 /*! Init timezone. */
@@ -554,6 +559,17 @@ void DeRestPluginPrivate::configurationChanged()
     }
 }
 
+/*! Network state change request received from deCONZ core (e.g. Join/Leave clicked)
+ */
+void DeRestPluginPrivate::networkStateChangeRequest(bool shouldConnect)
+{
+    if (gwRfConnectedExpected != shouldConnect)
+    {
+        gwRfConnectedExpected = shouldConnect;
+        queSaveDb(DB_CONFIG, DB_SHORT_SAVE_DELAY);
+    }
+}
+
 /*! Configuration REST API broker.
     \param req - request data
     \param rsp - response data