Option to cofigure ON/OFF payload at build time (#1085)

code/espurna/config/general.h

@@ -273,6 +273,14 @@
 #define RELAY_SAVE_DELAY            1000
 #endif
 
+// Configure the MQTT payload for ON/OFF
+#ifndef RELAY_MQTT_ON
+#define RELAY_MQTT_ON               "1"
+#endif
+#ifndef RELAY_MQTT_OFF
+#define RELAY_MQTT_OFF              "0"
+#endif
+
 // -----------------------------------------------------------------------------
 // WIFI
 // -----------------------------------------------------------------------------

code/espurna/relay.ino

@@ -718,7 +718,7 @@ void relayMQTT(unsigned char id) {
     // Send state topic
     if (_relays[id].report) {
         _relays[id].report = false;
-        mqttSend(MQTT_TOPIC_RELAY, id, _relays[id].current_status ? "1" : "0");
+        mqttSend(MQTT_TOPIC_RELAY, id, _relays[id].current_status ? RELAY_MQTT_ON : RELAY_MQTT_OFF);
     }
 
     // Check group topic
@@ -728,7 +728,7 @@ void relayMQTT(unsigned char id) {
         if (t.length() > 0) {
             bool status = relayStatus(id);
             if (getSetting("mqttGroupInv", id, 0).toInt() == 1) status = !status;
-            mqttSendRaw(t.c_str(), status ? "1" : "0");
+            mqttSendRaw(t.c_str(), status ? RELAY_MQTT_ON : RELAY_MQTT_OFF);
         }
     }
 
@@ -743,7 +743,7 @@ void relayMQTT(unsigned char id) {
 
 void relayMQTT() {
     for (unsigned int id=0; id < _relays.size(); id++) {
-        mqttSend(MQTT_TOPIC_RELAY, id, _relays[id].current_status ? "1" : "0");
+        mqttSend(MQTT_TOPIC_RELAY, id, _relays[id].current_status ? RELAY_MQTT_ON : RELAY_MQTT_OFF);
     }
 }