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publish.py
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publish.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Requirement library
# python3 -m pip install 'paho-mqtt>=1.0.0,<2.0.0'
import random
import socket
import paho.mqtt.client as mqtt
import argparse
if __name__=='__main__':
parser = argparse.ArgumentParser()
parser.add_argument('--host', help='mqtt broker', default='esp32-broker.local')
parser.add_argument('--port', type=int, help='mqtt port', default=1883)
parser.add_argument('--topic', help='mqtt topic', default='/take/picture')
args = parser.parse_args()
print("args.host={}".format(args.host))
print("args.port={}".format(args.port))
print("args.topic={}".format(args.topic))
_host = socket.gethostbyname(args.host)
print("_host={}".format(_host))
client_id = f'python-mqtt-{random.randint(0, 1000)}'
client = mqtt.Client(client_id=client_id, protocol=mqtt.MQTTv311)
client.connect(_host, port=args.port, keepalive=60)
client.publish(args.topic, b'take picture')
client.disconnect()