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February 19, 2024 16:48
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paho.mqtt python publisher
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| #!/usr/bin/env python3 | |
| import asyncio | |
| import random | |
| import string | |
| import json | |
| import paho.mqtt.client as mqtt | |
| broker = 'localhost' | |
| port = 1883 | |
| alhabet = string.ascii_lowercase+string.digits | |
| async def connect_mqtt(client_id): | |
| def on_connect(client, userdata, flags, rc, properties): | |
| if rc != 0: | |
| print(f"Failed to connect, result code {rc}\n") | |
| client = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2, client_id=client_id, protocol=mqtt.MQTTv5) | |
| client.on_connect = on_connect | |
| client.connect(broker, port) | |
| return client | |
| async def publish(client, id): | |
| topic = f'/{''.join(random.sample(alhabet, 10))}/otaa' | |
| msg = json.dumps({'otaUrl': 'mqtt', 'otaBinary': 'latest.bin', 'id': id}) | |
| rc = client.publish(topic, msg) | |
| print(f"published to {topic} with message {msg}, rc={rc[0]}") | |
| async def main(): | |
| tasks = [] | |
| for i in range(1, 51): | |
| client_id = f'python-mqtt-{i}' | |
| client = await connect_mqtt(client_id) | |
| tasks.append(publish(client, i)) | |
| await asyncio.gather(*tasks) | |
| if __name__ == '__main__': | |
| asyncio.run(main()) |
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