使用MQTTAsync,你可以轻松地创建 MQTT 客户端应用程序并连接到 MQTT 代理(也称为 MQTT 服务器)。它支持发布(publish)和订阅(subscribe)消息的操作,可以在应用程序之间进行可靠的消息传递。 1、MQTTAsync_create() :MQTTAsync.h MQTTAsync_create() 是 MQTTAsync 库中用于创建 MQTT 客户端的函数。它接受五个参数...
payload)returnself.hass.async_add_job(self.async_update_ha_state())ifself._state_topicisNone:# Force into optimistic mode.self._optimistic =Trueelse:yieldfrommqtt.async_subscribe( self.hass, self._state_topic, message_received, self._qos)ifself._tilt_status_topicisNone: self._tilt_optimisti...
在上面说了,这个参数所设置的接口会在连接成功的时候调用,那么一些定死的主题在这里订阅即可。 使用到的订阅主题的接口:MQTTAsync_subscribe 这个接口的参数也可以设置成功调用的接口、失败调用的接口,可加可不加,这里就不主要讲了。接口最后一个入参,同样要区分v5和非V5。 V5:MQTTAsync_callOptions copts = MQTTAs...
Stringtopic="myTopic";Stringpayload="Hello, MQTT!";intqos=1;// 设置消息的质量等级为1MqttTokenpublishToken=client.publish(topic,payload.getBytes(),qos,false);publishToken.waitForCompletion();MqttTokensubscribeToken=client.subscribe(topic,qos);subscribeToken.waitForCompletion(); 1. 2. 3. 4. 5. ...
client.subscribe(topic); MqttMessage message = new MqttMessage(); message.setPayload("15".getBytes()); client.publish(topic, message); client.disconnect(); } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
[i]); printHelp(); return 255; } } // Validate the provided arguments if (strcmp(options.action, "publish") != 0 && strcmp(options.action, "subscribe") != 0) { printf("Invalid action: %s\n", options.action); printHelp(); return 255; } if (options.qos < 0 || options.qos...
gateway.subscribe(newRpcCommandSubscription(mapping.getDeviceNameFilter(),this)) ); } }catch(MqttException e) { log.error("[{}:{}] MQTT broker connection failed!", configuration.getHost(), configuration.getPort(), e);thrownewRuntimeException("MQTT broker connection failed!", e); ...
挂载WiFi的回调函数,处理进行WiFi连接后的事件(成功连接和连接失败)WiFi.onEvent(WiFiEvent);// 3.配置mqtt服务器,重要(都是挂载回调函数)mqttClient.onConnect(onMqttConnect);// 当mqtt连接时mqttClient.onDisconnect(onMqttDisconnect);// 失去连接时mqttClient.onSubscribe(onMqttSubscribe);// 订阅连接时mqtt...
isConnected()) { client.subscribe(topic, qos, future, actionCallback); } else { future.complete(false); } } catch (org.eclipse.paho.client.mqttv3.MqttException e) { logger.info("Error subscribing to topic {}", topic, e); future.completeExceptionally(e); } return future; } ...
A modified version of the Eclipse Paho MQTT Java library custom-tailored for Android use. - paho-mqtt-android/MqttAsyncClient.java at master · eladnava/paho-mqtt-android