56 lines
2.2 KiB
Markdown
56 lines
2.2 KiB
Markdown
## Sensor Node class
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This class is made to get the info of the sensor-nodes and send this to the database.
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This is done this way to make the code more clear and readable.
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```py
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#Import library's
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import mysql.connector
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import json
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#Import classes and functions from different files.
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from classes_data import Node
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from classes_data import dbLogin
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```
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After this the "__init__"function is called.
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(In javascript this is known as the "constructor".
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For further information visit https://www.w3schools.com/python/gloss_python_class_init.asp)
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```py
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#A class to send data to the database. child class of "Node"
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class SensorNode(Node):
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#A private query only to be used in this class.
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__query = "INSERT INTO `Measurement` (NodeID, Type, Value) VALUES (%s, %s, %s)"
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#All variables to be used.
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def __init__(self, macAdress, temp, humi, eCO2, TVOC):
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super().__init__(macAdress)
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self.temperature = temp
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self.humidity = humi
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self.eCO2 = eCO2
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self.TVOC = TVOC
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#A function to connect to the database, grab the info which is given, and push this to the database.
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async def processSensorNodeData(data, nodeID):
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try:
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mydb = dbLogin()
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cursor = mydb.cursor()
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processedData = json.loads(data)
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#The variables to give to the database.
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SensorNode.temperature = (processedData['Temp'])
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SensorNode.humidity = (processedData['Humi'])
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SensorNode.eCO2 = (processedData['eCO2'])
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SensorNode.TVOC = (processedData['TVOC'])
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#A array of the info to be given to the database in the correct format.
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pushingDataArray = [(nodeID, "Temp", SensorNode.temperature), (nodeID, "Humi", SensorNode.humidity), (nodeID, "eCO2", SensorNode.eCO2), (nodeID, "TVOC", SensorNode.TVOC)]
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#Go along all files of the array, and push it out to the database following the query.
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for i in pushingDataArray:
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cursor.execute(SensorNode.__query, i)
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mydb.commit()
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except mysql.connector.Error as err:
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print("MySQL Error:", err)
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finally:
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cursor.close()
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mydb.close()
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``` |