First working version with smllib

officeMeter.py

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+from smllib import SmlStreamReader
+import time
+import serial
+from datetime import datetime
+
+from influxdb_client import Point, WritePrecision
+from influx import writeToDB
+
+stream = SmlStreamReader()
+port = serial.Serial(port='/dev/ttyUSB0', baudrate=9600, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS)
+
+energyCounter = 0                           # Counter for values that should only be pushed to db every minute
+
+while True:
+    energyCounter += 1
+    pushTime = datetime.utcnow()            # Get current datetime and safe it in pushTime variable
+    pointList = []                          # Create list pointList where influxdb datapoint are stored before pushing to db
+    sml_frame = stream.get_frame()          # Create the frame object from bytestream which is None until the frame is complete
+
+    while sml_frame is None:
+        stream.add(port.read())             # Add bytes until full frame is received
+        try:
+            sml_frame = stream.get_frame()  # Find frame from stream
+        except Exception:
+            print("CRCERROR")
+            pass
+
+    # A quick Shortcut to extract all values without parsing the whole frame
+    # In rare cases this might raise an InvalidBufferPos exception, then you have to use sml_frame.parse_frame()
+    obis_values = sml_frame.get_obis()
+
+    # return all values but slower
+    parsed_msgs = sml_frame.parse_frame()
+    for msg in parsed_msgs:
+        # prints a nice overview over the received values
+        print(msg.format_msg())
+
+    # In the parsed message the obis values are typically found like this
+    obis_values = parsed_msgs[1].message_body.val_list
+
+    # The obis attribute of the SmlListEntry carries different obis representations as attributes
+    list_entry = obis_values[3]
+
+    officePowerIn = int(obis_values[3].value*0.01)
+    officeEnergyIn = int(obis_values[2].value*0.0001)
+
+    print("Büro Wirkleistung aktuell: " + str(officePowerIn) + "W")
+    print("Büro Energie bezug gesamt: " + str(officeEnergyIn) + "kWh")
+    pointList.append( Point('power').field('officePowerIn', officePowerIn).time(pushTime, WritePrecision.S) )
+
+    if energyCounter % 12 == 0:      # Only add energy to db every 6th while loop (every minute)
+        pointList.append( Point('energy').field('officeEnergyIn', officeEnergyIn).time(pushTime, WritePrecision.S) )
+        print("Energy in DB")
+        energyCounter = 0
+
+    for point in pointList:
+        print(point)
+
+    writeToDB(pointList)
+
+    time.sleep(5)