Asked by: Ermengol Fila
asked in category: General Last Updated: 14th March, 2020

Can MQTT work without Internet?

Re: MQTT without internet
It only needs an IP network as it uses TCP/IP for comms between the subscriber or publisher and the broker. An IP network doesn't mean you need the public internet. Two devices and one ethernet cable makes a network.

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Keeping this in view, does MQTT require Internet?

Yes, to send or receive messages, the MQTT client must establish a TCP connection to the broker. However, MQTT comes with features specifically designed to cope with unstable network connections, like the broker buffering incoming messages for disconnected clients.

Beside above, why do we need MQTT? MQTT was built to be a low-overhead protocol that strongly considered bandwidth and CPU limitations. MQTT fundamentally is a publish/subscribe protocol. It allows clients to connect as a publisher, subscriber, or both. You connect to a broker that handles all the message passing.

In this manner, can IoT work without Internet?

The Internet of things (IoT) is the network of devices such as vehicles, and home appliances that contain electronics, software, sensors, actuators, and connectivity which allows these things to connect, interact and exchange data. In this example, the system does not need to be connected to the Internet.

What is MQTT and how it works?

MQTT is a publish/subscribe protocol that allows edge-of-network devices to publish to a broker. Clients connect to this broker, which then mediates communication between the two devices. When another client publishes a message on a subscribed topic, the broker forwards the message to any client that has subscribed.

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