🎯 Biblioteca Paho MQTT em Python
Em poucas palavras
Biblioteca que implementa clientes MQTT em Python, permitindo conectar a um broker, publicar mensagens e assinar tópicos.
📝 Notas e Desenvolvimento
Código Simples
Um código simples para implementar um cliente Message Queuing Telemetry Transport em Linguagem de programação Python é apresentado abaixo.
import paho.mqtt.client as mqtt
### The callback for when the client receives a CONNACK response from the server.
def on_connect(client, userdata, flags, rc):
print("Connected with result code "+str(rc))
# Subscribing in on_connect() means that if we lose the connection and
# reconnect then subscriptions will be renewed.
client.subscribe("$SYS/#")
### The callback for when a PUBLISH message is received from the server.
def on_message(client, userdata, msg):
print(msg.topic+" "+str(msg.payload))
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect("mqtt.eclipseprojects.io", 1883, 60)
### Blocking calls that processes network traffic, dispatches callbacks and
### handles reconnecting.
### Other loop*() functions are available that give a threaded interface and a
### manual interface.
client.loop_forever()