ngcController.py

# python 3.11

import random
import time

from paho.mqtt import client as mqtt_client


broker = '10.1.25.108'
port = 1883
topic = "ngc/parameter/1/datasrc"
# Generate a Client ID with a random number suffix
client_id = f'controller-{random.randint(0, 1000)}'


def connect_mqtt():
    def on_connect(client, userdata, flags, rc):
        if rc == 0:
            print("Controller connected to MQTT Broker!")
        else:
            print("Failed to connect, return code %d\n", rc)

    client = mqtt_client.Client(mqtt_client.CallbackAPIVersion.VERSION1, client_id)
    # client.username_pw_set(username, password)
    client.on_connect = on_connect
    client.connect(broker, port)
    return client


def publish(client):
    time.sleep(1)
    msg = f"https://cataas.com/cat/gif"
    result = client.publish(topic, msg)
    # result: [0, 1]
    status = result[0]
    if status == 0:
        print(f"Send `{msg}` to topic `{topic}`")
    else:
        print(f"Failed to send message to topic {topic}")

def run():
    client = connect_mqtt()
    client.loop_start()
    publish(client)
    client.loop_stop()


if __name__ == '__main__':
    run()