def subscribe(client: mqtt_client): def on_message(client, userdata, msg): print(f"Received `{msg.payload.decode()}` from `{msg.topic}` topic") client.subscribe(topic) client.on_message = on_message def run(): client = connect_mqtt() subscribe(client) client.loop_forever() if __na...
从rc = mosquitto_subscribe(mosq, NULL, "example/temperature", 1);可知,订阅的消息主题为example/temperature。 再开一个窗口发布消息 mosquitto_pub -p 1883 -u ct -P xxxxxxxx -t example/temperature -m "26.6" 订阅测试窗口收到消息 用MQTT.fx远程测试 详细说明见《树莓派MQTT服务远程测试MQTT.fx》 zhu...
require 'mqtt' # Publish example MQTT::Client.connect('mqtt://glassx:glassxpw@127.0.0.1') do |c| p c.publish('topic', 'message') end # # Subscribe example # MQTT::Client.connect('test.') do |c| # # If you pass a block to the get method, then it will loop # c.get('tes...
# 当连接成功后,客户端订阅一个主题,并消费该主题的消息 client.subscribe(topic=topic) # 当客户端订阅的主题收到消息的时候执行的回调函数 defon_message(client, userdata, msg): # client 那个客户端 # userdata 用户数据 # msg 实际的消息对象 print(msg.topic+" "+str(msg.payload)) # 实例化一个客户...
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mv /etc/mosquitto/mosquitto.conf.example /etc/mosquitto/mosquitto.conf 1. 5、创建用户组和用户 sudo groupadd mosquitto sudo useradd -g mosquitto mosquitto -s /sbin/nologin 1. 2. 不创建执行程序没反应,猜测因为配置文件中默认使用user mosquitto。
mosquitto_sub example Let’s subscribe to the status of the coffee maker: mosquitto_sub -h localhost -t kitchen/coffeemaker -q1 Or, here is an example of subscribing to all sensors located in the kitchen: mosquitto_sub -t kitchen/sensors/+ -q2 ...
自定义的配置文件是放在/etc/mosquitto/conf.d/文件夹中,文件以.conf为扩展名。详细的配置参数参考mosquitto.conf.example # ===# General configuration# ===# 客户端心跳的间隔时间#retry_interval 20# 系统状态的刷新时间#sys_interval 10# 系统资源的回收时间,0表示尽快处理#store_clean_interval 10# 服务进...
= MOSQ_ERR_SUCCESS) { std::cerr << "MQTT connection failed" << std::endl; mosquitto_destroy(mosq); mosquitto_lib_cleanup(); return -1; } // 订阅主题 if (mosquitto_subscribe(mosq, NULL, topic, 0) != MOSQ_ERR_SUCCESS) { std::cerr << "Failed to subscribe to topic" << std::...
print(f"Connected with result code {rc}")# 当连接成功后,客户端订阅一个主题,并消费该主题的消息client.subscribe(topic=topic)# 当客户端订阅的主题收到消息的时候执行的回调函数def on_message(client, userdata, msg):# client 那个客户端# userdata 用户数据# msg 实际的消息对象print(msg.topic+" "+...