added dockerimage with python script to save energy data to a csv file

.gitignore

@@ -1,2 +1,3 @@
 data/**
 log/**
+energy-data/**

docker-compose.yaml

@@ -1,17 +1,23 @@
 version: "3.8"
 
 services:
-  mosquitto:
-    image: eclipse-mosquitto
-    container_name: mosquitto
-    restart: always
-    volumes:
-      - "./config:/mosquitto/config"
-      - "./data:/mosquitto/data"
-      - "./log:/mosquitto/log"
-    ports:
-      - '1883:1883'
-      - '9001:9001'
-    cap_add:
-      - NET_ADMIN
+    mosquitto:
+        image: eclipse-mosquitto
+        container_name: iot-mosquitto
+        restart: always
+        volumes:
+            - "./config:/mosquitto/config"
+            - "./data:/mosquitto/data"
+            - "./log:/mosquitto/log"
+        ports:
+            - '1883:1883'
+            - '9001:9001'
+        cap_add:
+          - NET_ADMIN
 
+    extractor:
+        build: ./extractor-image
+        container_name: iot-energy-extractor        
+        restart: always
+        volumes:
+            - "./energy-data:/data"

extractor-image/Dockerfile

@@ -0,0 +1,10 @@
+FROM python:slim
+
+# python packages
+RUN pip install --no-cache-dir paho-mqtt && pip cache purge
+
+WORKDIR /app
+
+COPY extractor.py /app/.
+
+ENTRYPOINT ["python", "/app/extractor.py"]

extractor-image/extractor.py

@@ -0,0 +1,67 @@
+#!/bin/python3
+
+import paho.mqtt.client as mqtt
+import json, csv
+import datetime
+
+
+broker_hostname ="www.weltenpendler.at"
+port = 1883 
+username = 'ms54'
+password = '5SFHTpoZ'
+
+topic = "flying-socket/status/energy"
+filename = '/data/flying-socket'
+
+def on_connect(client, userdata, flags, return_code):
+    if return_code == 0:
+        print("connected")
+        client.subscribe(topic)
+    else:
+        print("could not connect, return code:", return_code)
+
+
+def writeCSV(jsondata, id, ts):
+    s = jsondata[f's{id}']
+    data = {
+        'datetime': ts,
+        'aenergy_minute_ts': s['aenergy']['minute_ts'],
+        'aenergy_by_minute_0': s['aenergy']['by_minute'][0],
+        'aenergy_by_minute_1': s['aenergy']['by_minute'][1],
+        'aenergy_by_minute_2': s['aenergy']['by_minute'][2],
+        'aenergy_total': s['aenergy']['total'],
+        'pf': s['pf'],
+        'current': s['current'],
+        'voltage': s['voltage'],
+        'apower': s['apower'],
+        'temperature': s['temperature']['tC'],
+    }     
+
+    with open(f'{filename}-s{id}.csv', 'a') as file:
+        writer = csv.DictWriter(file, fieldnames=data.keys())
+        if file.tell() == 0: writer.writeheader()
+        writer.writerow(data)
+
+def on_message(client, userdata, message):
+    message = str(message.payload.decode("utf-8"))
+    jsondata = json.loads(message)
+    now = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+    
+    with open(filename+'.log', 'a') as f:
+        print(message, file=f)
+
+    writeCSV(jsondata, 0, now)
+    writeCSV(jsondata, 1, now)
+
+
+
+
+client = mqtt.Client("AutomaticDataExtractor")
+client.connect(broker_hostname)
+client.username_pw_set(username=username, password=password)
+client.on_connect=on_connect
+client.on_message=on_message
+print('starting ...')
+
+client.loop_forever()
+