paho

Paho Python Client with HiveMQ

由 一笑奈何 提交于 2019-12-08 11:54:07
问题 i am developing a module in python that will allow me to connect my raspberry pi to a version of hivemq hosted on my pc. it connects normally but when i add hivemq's file auth plugin it doesnt seem to work im using the username_pw_set to set my username and password here is what my code currently looks like: import paho.mqtt.client as mqtt client = mqtt.Client() #The callback for when the client recieves a CONNACK response from the server def on_connect(client, userdata, flags, rc): print(

How to start camel even if the MQTT server is not reachable

由 风格不统一 提交于 2019-12-08 11:40:35
问题 I would like to make my Apache Camel application to be more resilient and start even when the MQTT broker is not reachable. We are using Camel on IoT devices with a possibly unstable internet connection and I want our application to start even without internet access. An exemplary route looks like the following: from("timer:heartbeat?period=5000") .routeId("send heartbeat") .setBody(simple("Hello World!")) .to("paho:myhostnome/heartbeat?brokerUrl={{broker.url}}") This works fine as long as

Trying Mqtt connection on Android using Paho MqttClient

由 放肆的年华 提交于 2019-12-08 04:18:45
问题 When you first open the app I want a screen where you can enter the broker information and click try and save. When clicking try it should just show a Snackbar saying if the information makes for a successful connection. This is the code I call when the try button is pressed: private void tryConnection(View v){ if(verifyInputs()){ Snackbar.make(v, getString(R.string.trying_connection), Snackbar.LENGTH_LONG).show(); String clientId = MqttClient.generateClientId(); MqttAndroidClient client =

The callBacklistener is called Twice?

由 风流意气都作罢 提交于 2019-12-08 03:15:58
问题 In the below, when i run it and intentionally turn the WiFi off, the callBack clientCallBack.connectionLost displays the message Log.d(TAG, "@connectionLost: MQTT Server connection lost"); twice. And When I re connect, the message Log.i(TAG, "@onSuccess: Connection Successful."); in the client_1.connect callback is displayed only once. anyone can expain why i receive the message from the calback twice? Code @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate

Does Eclipse Paho Mqtt Client persist all the published messages published till they are ACKed for delivery by the broker under QoS-2?

由 南楼画角 提交于 2019-12-07 17:38:51
问题 Does the default PAHO MQTT implementation persist all the messages that are being pushed, until their delivery is confirmed specifically in QoS 2 ? Or if not how is it possible to implement such by our own? UPDATE Since paho android service version 1.1.0 automatic reconnect and offline buffering features are implemented. For more info : https://www.eclipse.org/paho/clients/android/ 回答1: From the javadoc for MqttClient By default MqttDefaultFilePersistence is used to store messages to a file.

Eclipse paho Mqtt:Getting java.io.EOF Exception

由 天大地大妈咪最大 提交于 2019-12-07 17:31:28
问题 I am getting "java.io.eof" exception,when i am trying to subscribe mqtt client. I am using eclipse paho library and using mosquitto broker. I am not getting any answer of this,so please help me why this happens ? Mqtt connection and subscribe I am using this code for connecting and subscribing to mosquitto private void buildClient(String clientId){ log.debug("Connecting... "+clientId); try { mqttClient = new MqttClient(envConfiguration.getBrokerUrl(), clientId,new MemoryPersistence()); System

Android - Paho Mqtt client does not receive messages once network connectivity changes (mobile data disabled and enabled again)

由 本小妞迷上赌 提交于 2019-12-07 07:06:50
问题 I am using Mosquitto Mqtt along with paho API to receive push messages on android device. But as soon as the network connectivity changes it stops receiving messages. Here are the steps to reproduce the issue with simple test case: 1) Create a simple activity. 2) On Activity StartUp connects to mosquitto test server (test.mosquitto.org:1883) through paho API. 3) Subscribe to some topic. 4) Publish some message to the topic. Result: Mqtt Client receives all the messages published to the topic.

published message store by mosquitto broker when subscriber is offline with QOS=2

由 余生颓废 提交于 2019-12-06 05:21:14
My both publisher and subscriber are both connected to mosquitto (paho) broker with QOS=2 and maintaining persistent session by clean_session=false. When i publish message with subscriber connected to broker, it successfully received by subscriber, now if I disconnect the subscriber , then again publish message and connect subscriber after, I will be able to retrieve message those messages when my subscriber was offline. My question is -- Is there any storage in the broker which stores all the messages when subscriber is offline. If yes, how much long or how many message it can store. Is this

Eclipse paho Mqtt:Getting java.io.EOF Exception

由 ↘锁芯ラ 提交于 2019-12-06 01:22:19
I am getting "java.io.eof" exception,when i am trying to subscribe mqtt client. I am using eclipse paho library and using mosquitto broker. I am not getting any answer of this,so please help me why this happens ? Mqtt connection and subscribe I am using this code for connecting and subscribing to mosquitto private void buildClient(String clientId){ log.debug("Connecting... "+clientId); try { mqttClient = new MqttClient(envConfiguration.getBrokerUrl(), clientId,new MemoryPersistence()); System.out.println(mqttClient.isConnected()); } catch (MqttException e) { log.debug("build client stopped due

Java Eclipse Paho Implementation - Auto reconnect

由 萝らか妹 提交于 2019-12-06 00:59:57
问题 I'm trying to implement eclipse.paho in my project to connect Mqtt Broker (Both subscribing and publishing purpose). The problem is, when I using the subscribing feature (Implementing MqttCallback interface), I couldn't figure our how can I reconnect if the connection lost. MqttCallback interface has a connectionLost method, but it is useful for the debug what causes the connection lost. I searched but couldn't find a way to establish auto reconnect. Can you suggest a way or document about
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