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import argparse
import json
import logging
import sys
from datetime import datetime
import paho.mqtt.client as mqtt
import psycopg2
# Author: Gary A. Stafford
# Date: 10/11/2020
# Usage: python3 \
# --msqt_topic "sensor/output --msqt_host "" --msqt_port 1883 \
# --ts_host "" --ts_port 5432 \
# --ts_username postgres --ts_password postgres1234 --ts_database demo_iot
logger = logging.getLogger(__name__)
logging.basicConfig(stream=sys.stdout, level=logging.DEBUG)
args = argparse.Namespace
ts_connection: str = ""
def main():
global args
args = parse_args()
global ts_connection
ts_connection = "postgres://{}:{}@{}:{}/{}".format(args.ts_username, args.ts_password, args.ts_host,
args.ts_port, args.ts_database)
logger.debug("TimescaleDB connection: {}".format(ts_connection))
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect(args.msqt_host, args.msqt_port, 60)
# Blocking call that processes network traffic, dispatches callbacks and
# handles reconnecting.
# Other loop*() functions are available that give a threaded interface and a
# manual interface.
# The callback for when the client receives a CONNACK response from the server.
def on_connect(client, userdata, flags, rc):
logger.debug("Connected with result code {}".format(str(rc)))
# Subscribing in on_connect() means that if we lose the connection and
# reconnect then subscriptions will be renewed.
# The callback for when a PUBLISH message is received from the server.
def on_message(client, userdata, msg):
logger.debug("Topic: {}, Message Payload: {}".format(msg.topic, str(msg.payload)))
def date_converter(o):
if isinstance(o, datetime):
return o.__str__()
def publish_message_to_db(message):
message_payload = json.loads(message.payload)
# logger.debug("message.payload: {}".format(json.dumps(message_payload, default=date_converter)))
sql = """INSERT INTO sensor_data(time, device_id, temperature, humidity, lpg, co, smoke, light, motion)
VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s);"""
data = (
message_payload["time"], message_payload["device_id"], message_payload["data"]["temperature"],
message_payload["data"]["humidity"], message_payload["data"]["lpg"], message_payload["data"]["co"],
message_payload["data"]["smoke"], message_payload["data"]["light"], message_payload["data"]["motion"])
with psycopg2.connect(ts_connection, connect_timeout=3) as conn:
with conn.cursor() as curs:
curs.execute(sql, data)
except psycopg2.Error as error:
logger.error("Exception: {}".format(error.pgerror))
except Exception as error:
logger.error("Exception: {}".format(error))
except psycopg2.OperationalError as error:
logger.error("Exception: {}".format(error.pgerror))
# Read in command-line parameters
def parse_args():
parser = argparse.ArgumentParser(description='Script arguments')
parser.add_argument('--msqt_topic', help='Mosquitto topic', default='paho/test')
parser.add_argument('--msqt_host', help='Mosquitto host', default='localhost')
parser.add_argument('--msqt_port', help='Mosquitto port', type=int, default=1883)
parser.add_argument('--ts_host', help='TimescaleDB host', default='localhost')
parser.add_argument('--ts_port', help='TimescaleDB port', type=int, default=5432)
parser.add_argument('--ts_username', help='TimescaleDB username', default='postgres')
parser.add_argument('--ts_password', help='TimescaleDB password', default='postgres1234')
parser.add_argument('--ts_database', help='TimescaleDB password', default='demo_iot')
return parser.parse_args()
if __name__ == "__main__":
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