diff --git a/drivers/ipwebcam/device.js b/drivers/ipwebcam/device.js
index 05cde78..e3ee397 100644
--- a/drivers/ipwebcam/device.js
+++ b/drivers/ipwebcam/device.js
@@ -53,7 +53,18 @@ class IpwebcamDevice extends Homey.Device {
           }
         })
         .catch(error => {
-          this.setUnavailable(Homey.__('Unreachable'));
+		  switch (error)
+		  {
+		    case 'err_sensor_motion':
+			case 'err_sensor_sound':
+			case 'err_sensor_light':
+			case 'err_sensor_battery':
+              this.setUnavailable(Homey.__(error));
+			  break;
+		    default:
+              this.setUnavailable(Homey.__('Unreachable'));
+			  break;
+		  }
           this.pingDevice();
         })
     }, 1000 * interval);
diff --git a/lib/util.js b/lib/util.js
index 7bfa5fd..a379203 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -61,28 +61,42 @@ exports.getIpwebcam = function (address, port, username, password) {
       .then(json => {
         var lux = 0;
 
-        if(json.hasOwnProperty("motion_active") && !isEmpty(json.motion_active.data) && json.motion_active.data[0][1][0] == 1) {
-          var motion = true;
-        } else {
-          var motion = false;
-        }
-
-        if(json.hasOwnProperty("sound_event") && !isEmpty(json.sound_event.data) && json.sound_event.data[0][1][0] == 1) {
-          var sound = true;
-        } else {
-          var sound = false;
-        }
-
-        if(json.hasOwnProperty("light") && !isEmpty(json.light.data)) {
+        if(json.hasOwnProperty("motion_active") &&
+          !isEmpty(json.motion_active.data))
+		{
+          if(json.motion_active.data[0][1][0] == 1)
+          {
+            var motion = true;
+          } else {
+            var motion = false;
+          }
+		} else { return reject('err_sensor_motion'); }
+
+        if(json.hasOwnProperty("sound_event") &&
+          !isEmpty(json.sound_event.data))
+		{
+          if(json.sound_event.data[0][1][0] == 1)
+          {
+            var sound = true;
+          } else {
+            var sound = false;
+          }
+		} else { return reject('err_sensor_sound'); }
+
+        if(json.hasOwnProperty("light") &&
+          !isEmpty(json.light.data))
+        {
           var lux = json.light.data[0][1][0];
         } else {
-          var lux = 0;
+          return reject('err_sensor_light');
         }
 
-        if(json.hasOwnProperty("battery_level") && !isEmpty(json.battery_level.data)) {
+        if(json.hasOwnProperty("battery_level") &&
+          !isEmpty(json.battery_level.data))
+        {
           var battery = json.battery_level.data[0][1][0];
         } else {
-          var battery = 100;
+          return reject('err_sensor_battery');
         }
 
         var result = {
diff --git a/locales/en.json b/locales/en.json
index 4e6a148..433d0c8 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -33,6 +33,10 @@
         "success": "Settings have been saved succesfully."
     },
     "Unreachable": "Unreachable",
+	"err_sensor_motion": "Missing sensor data: motion",
+	"err_sensor_sound": "Missing sensor data: sound",
+	"err_sensor_light": "Missing sensor data: light",
+	"err_sensor_battery": "Missing sensor data: battery",
     "Live Snapshot": "Live Snapshot",
     "This is a test email which confirms your email settings in the Homey IP Webcam App are correct.": "This is a test email which confirms your email settings in the Homey IP Webcam App are correct.",
     "<h1>Homey IP Webcam App</h1><p>This is a test email which confirms your email settings in the Homey IP Webcam App are correct.</p>": "<h1>Homey IP Webcam App</h1><p>This is a test email which confirms your email settings in the Homey IP Webcam App are correct.</p>",
diff --git a/locales/nl.json b/locales/nl.json
index 0163d8b..ebcc7f7 100644
--- a/locales/nl.json
+++ b/locales/nl.json
@@ -33,6 +33,10 @@
       "success": "Instellingen zijn succesvol opgeslagen."
     },
     "Unreachable": "Onbereikbaar",
+	"err_sensor_motion": "Sensor data ontbreekt: motion",
+	"err_sensor_sound": "Sensor data ontbreekt: sound",
+	"err_sensor_light": "Sensor data ontbreekt: light",
+	"err_sensor_battery": "Sensor data ontbreekt: battery",
     "Live Snapshot": "Live snapshot",
     "This is a test email which confirms your email settings in the Homey IP Webcam App are correct.": "Dit is een test email die bevestigd dat je instellingen voor email in de Homey IP Webcam App correct zijn.",
     "<h1>Homey IP Webcam App</h1><p>This is a test email which confirms your email settings in the Homey IP Webcam App are correct.</p>": "<h1>Homey IP Webcam App</h1><p>Dit is een test email die bevestigd dat je instellingen voor email in de Homey IP Webcam App correct zijn.</p>",