initial

.hgignore

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+syntax: glob
+*.pyc
+

.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>FridgeAlarm2</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.python.pydev.PyDevBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.python.pydev.pythonNature</nature>
+	</natures>
+</projectDescription>

.pydevproject

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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?eclipse-pydev version="1.0"?><pydev_project>
+<pydev_pathproperty name="org.python.pydev.PROJECT_SOURCE_PATH">
+<path>/${PROJECT_DIR_NAME}</path>
+</pydev_pathproperty>
+<pydev_property name="org.python.pydev.PYTHON_PROJECT_VERSION">python 2.7</pydev_property>
+<pydev_property name="org.python.pydev.PYTHON_PROJECT_INTERPRETER">Default</pydev_property>
+</pydev_project>

FridgeAlarm.py

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+import pymongo
+import datetime
+
+client = pymongo.MongoClient('172.16.2.15')
+db = client.iot
+iot = db.iot
+
+now1 = datetime.datetime.now()
+now = now1.replace(now1.year, now1.month, now1.day, now1.hour, now1.minute, now1.second, 0)
+midnight = now.replace(now.year, now.month, now.day, 0,0,0,0)
+seconds = (now - midnight).seconds
+intervalBegin = seconds - 15 * 60
+
+if intervalBegin > 0:
+    pipeline = [
+                {'$match': {'metadata.device': 'ModbusHub', 
+                            'metadata.day': midnight,
+                            'metadata.seconds': {'$gt': intervalBegin, '$lt': seconds}
+                            }},
+                {'$sort': {'seconds': 1}},
+                {'$project': {'_id': 0, 'ts': '$metadata.timestamp', 't': '$data.t2'}}
+                ]
+    cursor = iot.aggregate(pipeline, useCursor=True)
+    for item in cursor:
+        print(item)
+        
+        
+        
+#                        {'$group': {'_id': 0,
+#                            'avgTemp': {'$avg': '$data.t2'}}}