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  • IoT: do I need to use MQTT or HTTP? - Stack Overflow
    As MQTT is designed for delivering data (not entire pages) its pub sub model offers many useful built-in features such as retention and last will Also MQTT offers a simple way of implementing encryption, authentication, and access control MQTT is intended for situations where your connection may be intermittent or otherwise unreliable
  • mqtt - How to test the `Mosquitto` server? - Stack Overflow
    the mqtt default port is 1883 but if are running on a different port just like http you can specify port e g ( curl mqtt: localhost:1883 ) the proper test would be to subscribe and publish to a topic which can also be done somewhat with curl e g
  • javascript - mqtt client in html page - Stack Overflow
    If you want to connect to a MQTT broker from with a web page you MUST use MQTT over Websockets The Javascript sandbox in the browser will not allow you to do it any other way You will need to use a MQTT broker that supports MQTT over Websockets and you will most likely need to configure it to do so
  • mosquitto-client obtain refused connection - Stack Overflow
    I experienced the same issue, for me it was in upgrading mosquitto for mqtt v5 support: $ mosquitto --version mosquitto version 2 0 14 mosquitto is an MQTT v5 0 v3 1 1 v3 1 broker However, the upgraded broker no longer supported anonymous connections: $ mosquitto_pub -t mytopic -m "Hello World" Connection error: Connection Refused: not authorised
  • How to use MQTT over the internet? - Stack Overflow
    add line listener 1883 0 0 0 0 under #listener port-number [ip address host name] This will allow requests from any source on 1883 port to be handled by your MQTT Restart MQTT ; I could successfully open up my MQTT server to public internet traffic by following above steps after many trial and errors with many different configuration changes
  • Newest mqtt Questions - Stack Overflow
    Using python paho-mqtt, I'm trying to receive exactly 1 message from a topic and then exit If no messages
  • Understanding mqtt subscriber qos - Stack Overflow
    i did't read MQTT protocol Specifications yet, just say my test with mosquitto 1 5 3 1 run mosquitto server broker with default conf mosquitto -v 1541075091: mosquitto version 1 5 3 starting 1541075091: Using default config 2 pub test msg AAA sub topic 'aaa' BBB sub topic '+' DDD pub topic 'aaa' 3 the server stdout
  • How can I get the mqtt broker url starting with mqtts: ?
    Your broker is currently configured with a bare MQTT (mqtt:\\) listener on port 1883 So your connection URL for loriot should be: mqtt: 54 180 126 214:1883 If loriot requires a MQTT over TLS (mqtts: ) connection then you will need to first get a TLS certificate, then configure the broker to use it You should probably get a hostname for the
  • Configuring mosquitto MQTT broker to listen on multiple ports
    I suspected something was wrong about certificates but I followed the indications on test mosquitto org reporting: The server listens on the following ports: 1883 : MQTT, unencrypted 8883 : MQTT, encrypted 8884 : MQTT, encrypted, client certificate required 8080 : MQTT over WebSockets, unencrypted 8081 : MQTT over WebSockets, encrypted so seems
  • How to implement a request-response pattern with paho mqtt java . . .
    This can be done using MQTT5 This is how it works: Suppose you have two MQTT clients, one of which acts as a server client1, client2(server) client1 publishes a message with a response topic in the message property client2 receives the message reads the message properties and publishes the response on that topic client 1 gets the message on the response topic





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