diff --git a/ttn-vegapulsair-exporter.py b/ttn-vegapulsair-exporter.py
index 702921c..c7af465 100644
--- a/ttn-vegapulsair-exporter.py
+++ b/ttn-vegapulsair-exporter.py
@@ -5,15 +5,17 @@
 
 from http.server import BaseHTTPRequestHandler, HTTPServer
 import paho.mqtt.client as mqtt
-from datetime import datetime
+from datetime import datetime, timedelta
 import threading
 import time
 import json
 import sys
 import config
 
+
 scrape_healthy = True
 startTime = datetime.now()
+lastMqttReception = datetime.now()
 node_metrics = list()
 mutex = threading.Lock()
 request_count = 0
@@ -40,9 +42,13 @@ class RequestHandler(BaseHTTPRequestHandler):
         
     def do_GET(self):
         global request_count
+        global lastMqttReception
+        global scrape_healthy
         request_count = request_count + 1
         #print("Request: " + self.path)
         if (self.path.startswith("/metrics")): 
+            if (datetime.now() - lastMqttReception) > timedelta(hours=7):
+                scrape_healthy = False
             self.get_metrics()
         else:
             self.send_response(200)
@@ -64,7 +70,7 @@ def update_metrics(payload, metadata):
     global mutex
     global scrape_healthy
     mutex.acquire()
-    scrape_healthy = True
+    scrape_healthy = False
     node_metrics.clear()
 
     if "Distance" in payload:
@@ -123,6 +129,7 @@ def update_metrics(payload, metadata):
         print("set snr: " + str(float(metadata[0]["snr"])))
         node_metrics.append("snr " + str(float(metadata[0]["snr"])))
 
+    scrape_healthy = True
     mutex.release()
 
 def on_connect(mqttc, obj, flags, rc):
@@ -136,6 +143,7 @@ def on_message(mqttc, obj, msg):
     try: 
         uplink_message = parsedJSON["uplink_message"]
         update_metrics(uplink_message["decoded_payload"], uplink_message["rx_metadata"])
+        lastMqttReception = datetime.now()
     except:
         mutex.acquire()
         scrape_healthy = False