So siehts ganz gut aus !

routes/switch.js

@@ -1,34 +1,53 @@
 var express = require('express');
 let  router = express.Router();
 let mqtt = require('mqtt');
+let moment = require('moment');
 let toSend = null;
+let tio;
 
-const brenndauer = 20;                                      // 20sec Relais ON
+const brenndauer = 300;                                      // 20sec Relais ON
 
 // MQTT:
 let connected = false;
-let status = 'MIST';
+let relais = 'MIST';
 let client = mqtt.connect('mqtt://play.rexfue.de');
+let offtime = "";
+let retur = {};
 
 client.on('connect', function() {
     connected = true;
+    retur.connect = 'connected';
     client.subscribe('stat/laufschrift/POWER');
 })
 
 client.on('message',function(topix,message) {
-    let erg = message.toString();
-    console.log("Status = ",erg);
-    status = erg;
+    relais = message.toString();
+    console.log("Status = ",relais);
+    retur.relais = relais;
 });
 
+client.on('reconnect', function(){
+   retur.connect = 'reconnect';
+});
+
+
+// beim start mal den Zustand abfragen
+doPublish("");
+
+
 function doPublish(payload) {
-    status = 'pending';
+//    retur.relais='pending';
     client.publish('cmnd/laufschrift/Power',payload);
     if (payload == 'On') {
-        setTimeout(doPublish,brenndauer*1000,"Off");
+        offtime = moment().add(brenndauer,'s').format("HH.mm");
+        tio =setTimeout(doPublish,brenndauer*1000,"Off");
+        retur.offtime = offtime;
+    } else if (payload == 'Off') {
+        clearTimeout(tio);
+        delete retur.offtime;
     }
 }
-
+// end MQTT
 
 /* GET switch data */
 router.get('/:cmd', function(req, res, next) {
@@ -42,11 +61,13 @@ router.get('/:cmd', function(req, res, next) {
     } else if (cmd == 'switch_off') {
         doPublish("Off");
     } else if (cmd == 'check') {
+
     } else {
-        erg = { error: "invalid command"};
-        res.json(erg);
+        retur = { error: "invalid command"};
+        res.json(retur);
     }
-    res.json({status:status});
+    console.log("return: ",retur)
+    res.json(retur);
 });