paho

I'm making an app with a mqtt client and a background service that makes a notification when I get certain mqtt message. I use Paho library and service as the client and everything works perfectly as long as I am connected to wifi and the broker is on. I don't want access to the broker over internet so when no wifi is available the client is disconnected, the problem is that when the wifi connects again the mqtt client wont reconnect. I have tried many things but the latest test was to make a handler check if there is internet and if its via wifi, and if it is I start the mqtt server again. I

Is anyone has a logical explanation why despite I have the clear session flage = false I do not receive the updated published message I am subscribed to while i am not connected to the broker? With the aorementioned flag set to false I ran my App, And i kept publishing to a topic some values (from the PC to the broker not from the Android device to the broker). And then I unpluged the usb of the Android Device frm the pc, and kept publishing some values again. When I plugged the usb to the pc again, i expected to see the values I recently published to that topic, but I did not receive any. The

Hi I have some code which includes publish/subscribe and actors. The generic_device class allows me to create other actors. I was wondering how do I create a specific actor from the generic_device class when I subscribe to a topic and if the topic isn't subscribed then no actor is created from the generic_device class. At the moment it is just if a specific message is received then the actor is created. All help appreciated thanks. import logging from datetime import timedelta import time from thespian.actors import * from transitions import Machine import paho.mqtt.client as mqtt class laser

Here is paho Async client: client = new MqttAsyncClient(appProps.getProperty("mqtt.broker"), appProps.getProperty("mqtt.clientId"), new MemoryPersistence()); client.setCallback(this); client.connect(null, new IMqttActionListener() { @Override public void onSuccess(IMqttToken imt) { try { client.subscribe(Constants.internalTopics, Constants.internalTopicQOS); } catch (MqttException ex) { ex.printStackTrace(); } } @Override public void onFailure(IMqttToken imt, Throwable thrwbl) { thrwbl.printStackTrace(); } }); Here I am sending messages in loop: while (iterator.hasNext()) { try { client

Im having problem connecting to a mqtt server using self signed certificate. im using Paho client and want to connect to a server using a TLSv1.2 . actually i was successful to connect in Android APIs 20+ but no success for below this version. what ive done till now : 1- created a PKCS#12 keystore and put the .crt file and assing a password to it and save it (it will be a .pfx file) 2- added the .pfx file to raw folder of recourse in android project 3- used below code to load self signed certificate: connection = createConnection(mqttCallback); MqttConnectOptions connOpts = optionsFromModel