Send relay status to domoticz on MQTT connection (#872)

code/espurna/domoticz.ino

@@ -43,7 +43,13 @@ void _domoticzMqtt(unsigned int type, const char * topic, const char * payload)
     String dczTopicOut = getSetting("dczTopicOut", DOMOTICZ_OUT_TOPIC);
 
     if (type == MQTT_CONNECT_EVENT) {
+
+        // Subscribe to domoticz action topics
         mqttSubscribeRaw(dczTopicOut.c_str());
+
+        // Send relays state on connection
+        domoticzSendRelays();
+
     }
 
     if (type == MQTT_MESSAGE_EVENT) {
@@ -138,6 +144,12 @@ void domoticzSendRelay(unsigned char relayID) {
     domoticzSend(buffer, relayStatus(relayID) ? "1" : "0");
 }
 
+void domoticzSendRelays() {
+    for (uint8_t relayID=0; relayID < relayCount(); relayID++) {
+        domoticzSendRelay(relayID);
+    }
+}
+
 unsigned int domoticzIdx(unsigned char relayID) {
     char buffer[15];
     snprintf_P(buffer, sizeof(buffer), PSTR("dczRelayIdx%u"), relayID);