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mqtt_linky_read_publish.py
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mqtt_linky_read_publish.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Lecture des informations de teleinformation du compteur Linky
et envoi vers un broker mqtt
# use case: python3 mqtt_linky_read_publish.py
"""
import serial
import time
import sys
import logging
from mymqtt import myMqtt
from paho.mqtt import client as mqtt_client
client_id="linky2mqtt"
linky_args = ["URMS1", "IRMS1", "URMS2", "IRMS2", "URMS3", "IRMS3"]
broker="127.0.0.1"
port = 1883
mqttc = myMqtt(client_id)
ymdhms = mqttc.yyyymmddhhmmss()
item_values={}
"""
Mode de teleinformation dit 'standard':
permettant de monitorer les 3 phases
utilise un baudrate=9600
NB: Le mode de teleinformation dit (historique) fonctionne avec baudrate=1200 et ne permet pas
de monitorer le triphasé
"""
baudrate=9600
ser = serial.Serial('/dev/ttyAMA0', baudrate, bytesize=7, timeout=1)
ser.isOpen()
mqttc.connect_to(broker, port, keepalive=30, publisher=True)
mqttc.log.info(f"time/{client_id}/start/loop")
mqttc.publish(topic=f"time/{client_id}/start/loop", msg=ymdhms)
for item in linky_args:
item_values[item]=""
try:
while True:
response = ser.readline()
if response != "":
items = response.split()
# print "# The line is not empty, let's go on..."
splitLen = len(items)
if splitLen >= 2:
# There are at least 3 items in the line, as expected, let's go on...
# The name is the first item
# The value is the one-before-last item (in most cases).
item = items[0].decode('utf-8')
value = items[splitLen-2]
if str(item) in linky_args:
if value.isdigit():
# Remove leading zeros from numerical values
value_int = int(value)
value = str(value_int)
if value != item_values[item]:
item_values[item] = value
mqttc.publish(topic=f"linky/{item}", msg=str(value), retain=False)
except serial.serialutil.SerialException as e:
print(f"\nserial.serialutil.SerialException {e}\n")
mqttc.log.error(f"serial.serialutil.SerialException {e}")
mqttc.publish(topic=f"linky/exception", msg=str(e), retain=True)
time.sleep(30)
exit()
except KeyboardInterrupt:
ser.close()