error count and error signal

src/CommunicationProcessor.py

@@ -3,6 +3,10 @@ import datetime
 import RS485Ext
 import RegisterDatapoint
 from pymodbus.client.sync import ModbusSerialClient
+import wiringpi2
+
+
+ERROR_PIN = 29
 
 class CommunicationProcessor(threading.Thread):
     def __init__(self, config, queue, pubQueue):
@@ -10,6 +14,8 @@ class CommunicationProcessor(threading.Thread):
         self.config = config
         self.queue = queue
         self.pubQueue = pubQueue
+        wiringpi2.wiringPiSetup()
+        wiringpi2.pinMode(ERROR_PIN, wiringpi2.OUTPUT)
         self.daemon = True
 
     def __getSerial(self):
@@ -25,10 +31,12 @@ class CommunicationProcessor(threading.Thread):
         while True:
             r = self.queue.get()
             try:
+                wiringpi2.digitalWrite(ERROR_PIN, wiringpi2.LOW)
                 print("Dequeued: {0!s}".format(r))
                 r.enqueued = False
                 r.process(client, self.pubQueue)
             except RegisterDatapoint.DatapointException as e:
+                wiringpi2.digitalWrite(ERROR_PIN, wiringpi2.HIGH)
                 print("ERROR when processing '{0}': {1!s}".format(r.label, e))
                 if client.socket is None:
                     print("renew socket")