add exception handling to convert humidity

mqtt_publish_temp.py

@@ -45,22 +45,29 @@ client.connect(mqtt_broker)  # MQTT server address
 client.loop_start()
 
 while True:
-
         # Get Temperature from DHT
         _, temperature = Adafruit_DHT.read_retry(DHT_SENSOR, DHT_PIN)
-        temperature = round(float(temperature), 2)
+        
         # Get Humidity from DHT
         humidity, _ = Adafruit_DHT.read_retry(DHT_SENSOR, DHT_PIN)
-        humidity = round(float(humidity), 2)
+        
+        #Output data to screen
+        print(dt_string)
+        print(temperature)
+        print(humidity)
+        
+        
+        temperature = round(float(temperature), 2)
+        
+        try:
+            humidity = round(float(humidity), 2)
+            break
+        except ValueError:
+            print("Not able to convert humidity to float: " + humidity)
 
         # Publish our data
         client.publish(temperature_topic, temperature)
         client.publish(humidity_topic, humidity)
         client.publish(time_topic, dt_string)
 
-        #Output data to screen
-        print(dt_string)
-        print(temperature)
-        print(humidity)
-
         time.sleep(30)