From 6c60a184b811959eba8a467122d3a44d53c73368 Mon Sep 17 00:00:00 2001
From: Bram Barbieri <bram.barbieri@hva.nl>
Date: Thu, 14 Mar 2024 18:05:38 +0100
Subject: [PATCH] database websocket connection documentation.

---
 docs/rpi-documentation/Databaseconnection.md | 65 ++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 docs/rpi-documentation/Databaseconnection.md

diff --git a/docs/rpi-documentation/Databaseconnection.md b/docs/rpi-documentation/Databaseconnection.md
new file mode 100644
index 0000000..0372d01
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+++ b/docs/rpi-documentation/Databaseconnection.md
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+## Python code + explaination
+```js
+// Here different librarys are imported to 
+// everything is running async so the code can run together and not interfere with eachother.
+import asyncio
+import websockets
+// a library to connect to the database.
+import mysql.connector 
+import json
+
+//the data that has to be pushed needs to be 
+async def process_data(data):
+    try:
+        mydb = mysql.connector.connect(
+            host="localhost",
+            user="*****",
+            password="*********",
+            database="*******" 
+        )
+        cursor = mydb.cursor()
+        // the segments in wich the infromation will be sent.
+        query = "INSERT INTO `Measurement` (NodeID, Type, Value) VALUES (%s, %s, %s)"
+        // the json data collected from the websocket gets collected and transformed into data usable by python.
+        mrdata = json.loads(data)
+        //variables get the different types of data.
+        mrtemp = (mrdata['Temp'])
+        mrhumi = (mrdata['Humi'])
+        mrco = (mrdata['eCO2'])
+        mrtvoc = (mrdata['TVOC'])
+        mrnode = (mrdata['node'])
+        //an array is made to holster the different information clusters, for the time being it holds the infromation of one node.
+        mrarray = [(1, "Temp", mrtemp), (1, "Humi", mrhumi), (1, "eCO2", mrco), (1, "TVOC", mrtvoc)]
+        // a for statement to go trough the array.
+        for i in mrarray:
+            print(query ,i)
+            cursor.execute(query, i)
+            //commit the information to the database.
+            mydb.commit()
+    // if the connection to the database can't be made this error wil show with further information.
+    except mysql.connector.Error as err:
+        print("MySQL Error:", err)
+    finally:
+        cursor.close()
+        mydb.close()
+//here the connection to the websocked is made
+async def receive_data():
+    uri = "ws://145.92.8.114/ws"
+
+    try:
+        async with websockets.connect(uri) as websocket:
+            while True:
+                // the data collected from the websocket is.
+                data = await websocket.recv()
+                // dara recieved conformation.
+                print(f"Received data: {data}")
+                await process_data(data)
+    // error sowing.
+    except websockets.ConnectionClosedError as e:
+        print("WebSocket connection closed:", e)
+
+async def main():
+    await receive_data()
+
+asyncio.run(main())
+```
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