completes MAXH2O-2. adds PLC Watchdog

POCloud/advvfdipp.py

@@ -1,8 +1,11 @@
 
 import threading
 import time
+from random import randint
+from Channel import write_tag, read_tag
 from device_base import deviceBase
 
+PLC_IP_ADDRESS = "192.168.1.10"
 
 class start(threading.Thread, deviceBase):
     def __init__(self, name=None, number=None, mac=None, Q=None, mcu=None, companyId=None, offset=None, mqtt=None, Nodes=None):
@@ -10,7 +13,7 @@ class start(threading.Thread, deviceBase):
         deviceBase.__init__(self, name=name, number=number, mac=mac, Q=Q, mcu=mcu, companyId=companyId, offset=offset, mqtt=mqtt, Nodes=Nodes)
 
         self.daemon = True
-        self.version = "5"
+        self.version = "6"
         self.finished = threading.Event()
         threading.Thread.start(self)
 
@@ -20,4 +23,28 @@ class start(threading.Thread, deviceBase):
         self.channels["status"]["last_value"] = ""
 
     def run(self):
-        pass
+        watchdog = self.advvfdipp_watchdog()
+        self.sendtodbDev(1, 'watchdog', watchdog, 0)
+        # print("SENDING WATCHDOG: {}".format(watchdog))
+        watchdog_loops = 0
+        watchdog_check_after = 5000
+        while True:
+            watchdog_loops += 1
+            if (watchdog_loops >= watchdog_check_after):
+                test_watchdog = self.advvfdipp_watchdog()
+                if test_watchdog != watchdog:
+                    self.sendtodbDev(1, 'watchdog', test_watchdog, 0)
+                    # print("SENDING WATCHDOG: {}".format(test_watchdog))
+                    watchdog = test_watchdog
+                watchdog_loops = 0
+
+    def advvfdipp_watchdog(self):
+        """Write a random integer to the PLC and then 1 seconds later check that it has been decremented by 1."""
+        randval = randint(0, 32767)
+        write_tag(str(PLC_IP_ADDRESS), 'watchdog_INT', randval)
+        time.sleep(1)
+        watchdog_val = read_tag(str(PLC_IP_ADDRESS), 'watchdog_INT')
+        try:
+            return (randval - 1) == watchdog_val[0]
+        except (KeyError, TypeError):
+            return False

POCloud/config.txt

@@ -3,9 +3,10 @@
 "driverFileName":"advvfdipp.py",
 "deviceName":"advvfdipp",
 "driverId":"0100",
-"releaseVersion":"5",
+"releaseVersion":"6",
 "files": {
 	"file1":"advvfdipp.py",
-	"file2":"modbusMap.p" }
+	"file2":"modbusMap.p",
+	"file3":"Channel.py" }
 
 }