Updated main.py to be more failsafe. Now using umqtt.robust too.

main.py

@@ -4,7 +4,7 @@ import time
 import json
 import machine
 from machine import Pin
-from umqtt.simple import MQTTClient
+from umqtt.robust import MQTTClient
 import dht
 import urequests
 import wifi_config
@@ -115,7 +115,10 @@ def main():
     wlan = network.WLAN(network.STA_IF)
     
     # Create MQTT Client
-    mqtt_client = MQTTClient(mqtt_config.MQTT_CLIENT_ID, mqtt_config.MQTT_HOST_NAME)
+    mqtt_client = MQTTClient(
+        client_id = mqtt_config.MQTT_CLIENT_ID,
+        server = mqtt_config.MQTT_HOST_NAME,
+        )
 
     # Create DHT22
     sensor = dht.DHT22(Pin(DHT_22_GPIO_PIN))
@@ -132,73 +135,98 @@ def main():
         if DEBUG:
             print(f'\nStarting loop #{count}... \nWiFI Status is {wlan.status()}.')
         
+        # Create Local Flags for Control
+        wifi_ready = False
+        mqtt_ready = False
+        dht22_ready = False
+
+        # DHT22 and CPU Reading.
+        try:
+            # CPU Reading.
+            cpu_temp = read_cpu_temp()
+
+            # DHT22 Reading.
+            dht22_reading = read_dht_22(sensor)
+            #debug_str = "None"
+            if dht22_reading is not None:
+                temp,hum = dht22_reading
+                temp = temp * 9/5. + 32.0
+                dht22_ready = True
+        except:
+            continue
+
         # WiFi Connection.
-        if wlan.status() != 3:
+        try:
-            ifconfig = wlan_up(wlan)
+            if wlan.status() != 3:
-            if ifconfig is None:
+                ifconfig = wlan_up(wlan)
-                if DEBUG:
+                if ifconfig is None:
-                    print("Trouble to connecting WiFi: {}".format(e))
+                    if DEBUG:
-                led_error_code(led, 3)
+                        print("Trouble to connecting WiFi: {}".format(e))
-                time.sleep(10)
+                    led_error_code(led, 3)
-		continue
+                    time.sleep(10)
+                    continue
+                else:
+                    wifi_ready = True
+                    if DEBUG:
+                        print("Connected to WiFi: {}".format(ifconfig))
             else:
+                wifi_ready = True
+                ifconfig = wlan.ifconfig()
                 if DEBUG:
-                    print("Connected to WiFi: {}".format(ifconfig))
+                    print(f"Skipping WiFi Activation since WiFi Status is {wlan.status()} \n{ifconfig}.")
-        else:
+        except:
-            ifconfig = wlan.ifconfig()
+            continue
-            if DEBUG:
-                print(f"Skipping WiFi Activation since WiFi Status is {wlan.status()} \n{ifconfig}.")
 
         # MQTT Conneciton.
         try:
-            mqtt_client.connect()
+            try:
-            if DEBUG:
+                mqtt_client.connect(clean_session = False)
-                print(f'MQTT Connected.')
+                mqtt_ready = True
-        
+                if DEBUG:
-        except Exception as e:
+                    print(f'MQTT Connected.')
-            if DEBUG:
-                print("Trouble to connecting to MQTT: {}".format(e))
-            led_error_code(led, 2)
-            time.sleep(5)
-            continue # Start back at the top of the While Loop        
-
-        # DHT22 Reading.
-        dht22_reading = read_dht_22(sensor)
-        #debug_str = "None"
-        if dht22_reading is not None:
-            temp,hum = dht22_reading
-            temp = temp * 9/5. + 32.0
             
-        # CPU Reading.
+            except Exception as e:
-        cpu_temp = read_cpu_temp()
+                if DEBUG:
-        
+                    print("Trouble to connecting to MQTT: {}".format(e))
-        # Timestamp
+                led_error_code(led, 2)
-        time_now = time.localtime()
+                time.sleep(5)
-        timestamp = "{}/{}/{} {}:{}:{}".format(time_now[1],time_now[2],time_now[0],time_now[3],time_now[4],time_now[5])
+                continue # Start back at the top of the While Loop        
-        
+        except:
-        # Build JSON Payloads
+            continue
-        dht_data = {
-            'Location':mqtt_config.MQTT_ZONE_ID,
-            'Temperature':temp,
-            'Relative Humidity':hum,
-        }
-        dht_payload = json.dumps(dht_data)
-        
-        hw_data = {
-            'Timestamp':timestamp,
-            'CPU Temperature':cpu_temp,
-            'Device':mqtt_config.MQTT_HW_ID,
-            'WiFi Information':ifconfig,
-        }
-        hw_payload = json.dumps(hw_data)
-        
-        # Publish
-        mqtt_client.publish("home/{}".format(mqtt_config.MQTT_ZONE_ID),dht_payload, retain=True)
-        mqtt_client.publish("hw/{}".format(mqtt_config.MQTT_HW_ID),hw_payload, retain=True)
 
-        mqtt_client.disconnect()
+        # Ready to Publish?
-        if DEBUG:
+        try:
-            print(f'MQTT Disconnected.')
+            if wifi_ready and mqtt_ready and dht22_ready:
+                # Timestamp
+                time_now = time.localtime()
+                timestamp = "{}/{}/{} {}:{}:{}".format(time_now[1],time_now[2],time_now[0],time_now[3],time_now[4],time_now[5])
+                
+                # Build JSON Payloads
+                dht_data = {
+                    'Location':mqtt_config.MQTT_ZONE_ID,
+                    'Temperature':temp,
+                    'Relative Humidity':hum,
+                }
+                dht_payload = json.dumps(dht_data)
+                
+                hw_data = {
+                    'Timestamp':timestamp,
+                    'CPU Temperature':cpu_temp,
+                    'Device':mqtt_config.MQTT_HW_ID,
+                    'WiFi Information':ifconfig,
+                }
+                hw_payload = json.dumps(hw_data)
+                
+                # Publish
+                mqtt_client.publish("home/{}".format(mqtt_config.MQTT_ZONE_ID),dht_payload, retain=True)
+                mqtt_client.publish("hw/{}".format(mqtt_config.MQTT_HW_ID),hw_payload, retain=True)
+        
+                mqtt_client.disconnect()
+                if DEBUG:
+                    print(f'MQTT Disconnected.')
+
+        except:
+            continue
 
         # Sleep for a bit.
         if DEBUG: