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run.py
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#!/usr/bin/env python3
import logging
import asyncio
import serial
import paho.mqtt.client as mqtt
from defaults import SERIAL_PORT, SERIAL_BAUD, MQTT_TOPIC_FROM_SERIAL, MQTT_BROKER_URL, MQTT_BROKER_PORT, \
MQTT_KEEPALIVE
logging.basicConfig() # level=logging.DEBUG)
log = logging.getLogger()
s = serial.Serial(SERIAL_PORT, SERIAL_BAUD)
mqtt_client = mqtt.Client()
def on_connect(client, userdata, flags, rc):
log.info("MQTT Connected. Code %s" % rc)
mqtt_client.on_connect = on_connect
mqtt_client.connect(MQTT_BROKER_URL, MQTT_BROKER_PORT, MQTT_KEEPALIVE)
def _parse_line(data):
parts = data.split(" ", 4)
sender_id = parts[3]
data_part = parts[4].split("=", 1)[1]
return sender_id, data_part
def serial2mqtt():
'''
read a line and print.
'''
text = ""
msg = s.read().decode()
while (msg != '\n'):
text += msg
msg = s.read().decode()
log.debug(text)
try:
sender_id, message = _parse_line(text)
mqtt_client.publish(MQTT_TOPIC_FROM_SERIAL+"/"+sender_id, message)
except IndexError:
mqtt_client.publish(MQTT_TOPIC_FROM_SERIAL + "/error", text)
print("Starting")
loop = asyncio.get_event_loop()
loop.add_reader(s, serial2mqtt)
try:
loop.run_forever()
except KeyboardInterrupt:
pass
finally:
loop.close()
print("Finished")