diff --git a/MMM-AirQuality.js b/MMM-AirQuality.js
index d1c07a2..ac092a4 100755
--- a/MMM-AirQuality.js
+++ b/MMM-AirQuality.js
@@ -8,7 +8,6 @@ Module.register('MMM-AirQuality', {
   // Default module config.
   defaults: {
     initialDelay: 0,
-    lang: '',
     location: '',
     showLocation: true,
     showIndex: true,
@@ -38,12 +37,12 @@ Module.register('MMM-AirQuality', {
     self.loaded = false
 
     setTimeout(function () {
-      self.sendSocketNotification(self.notifications.DATA, self.config)
+      self.sendSocketNotification(self.notifications.DATA, { identifier: self.identifier, config: self.config })
     }, this.config.initialDelay * 1000)
 
     // set auto-update
     setInterval(function () {
-      self.sendSocketNotification(self.notifications.DATA, self.config)
+      self.sendSocketNotification(self.notifications.DATA, { identifier: self.identifier, config: self.config })
     }, this.config.updateInterval * 60 * 1000 + this.config.initialDelay * 1000)
   },
   render: function (response) {
@@ -138,12 +137,14 @@ Module.register('MMM-AirQuality', {
     Log.debug('received ' + notification)
     switch (notification) {
       case self.notifications.DATA_RESPONSE:
-        if (payload.status === 'OK') {
-          console.log('Data %o', payload.payloadReturn)
-          self.render(payload.payloadReturn)
-          self.updateDom(this.animationSpeed)
-        } else {
-          console.log('DATA FAILED ' + payload.message)
+        if (payload.identifier === this.identifier) {
+          if (payload.status === 'OK') {
+            console.log('Data %o', payload.payloadReturn)
+            self.render(payload.payloadReturn)
+            self.updateDom(this.animationSpeed)
+          } else {
+            console.log('DATA FAILED ' + payload.message)
+          }
         }
         break
     }
diff --git a/helper.js b/helper.js
index f6eb89b..b61dcb4 100644
--- a/helper.js
+++ b/helper.js
@@ -13,11 +13,10 @@ module.exports = {
   start: function () {
     console.log('AirQuality helper started ...')
   },
-  loadData: async function (config) {
+  loadData: async function (payload) {
     const self = this
-    self.config = config
-    const url = `https://${self.config.apiBase}${self.config.dataEndpoint}${self.config.location}/?token=${this.config.token}`
-    console.log(`AirQuality loaded: ${url}`)
+    const url = `https://${payload.config.apiBase}${payload.config.dataEndpoint}${payload.config.location}/?token=${payload.config.token}`
+    console.log(`AirQuality-Fetcher: ${url}`)
 
     const result = await fetch(url)
       .then(response => response.json())
@@ -25,11 +24,13 @@ module.exports = {
     self.sendSocketNotification(self.notifications.DATA_RESPONSE, {
       payloadReturn: result,
       status: 'OK',
+      identifier: payload.identifier,
     })
   },
   socketNotificationReceived: function (notification, payload) {
     switch (notification) {
       case this.notifications.DATA:
+        console.log(`AirQuality-Fetcher: Loading data of ${payload.config.location} for module ${payload.identifier}`)
         this.loadData(payload)
         break
     }