Lightweight communication protocol — MQTT
Lightweight communication protocol — MQTT Introduction 1. Introduction to MQTT MQTT (Message Queuing Telemetry Transport) is a lightweight message transport protocol commonly used for communication in the Internet of Things (IoT) and sensor networks. It is designed to transmit data over low-bandwidth, unstable, or high-latency network environments, making it ideal for communication between connected devices, especially in resource-constrained environments. The main features of MQTT include the following: Lightweight: The MQTT protocol itself is very simple, and the message header occupies less bandwidth, making it efficient in low-bandwidth networks. Publish/subscribe model: MQTT uses a publish/subscribe model, in which the client can subscribe to a specific topic (Topic) and receive messages related to the topic. A publisher publishes a message to a specific topic, and all clients subscribed to that topic will receive the message. Reliability: MQTT supports three different levels of message transmission quality, including at most once, at least once and only once transmission. The appropriate level can be selected according to application requirements. Durable sessions: MQTT allows clients to establish persistent sessions so that previous subscription and messaging state can be restored when reconnecting after a connection is lost. QoS (Quality of Service): MQTT provides different QoS levels to…
Lightweight communication protocol — MQTT
Lightweight communication protocol — MQTT Introduction 1. Introduction to MQTT MQTT (Message Queuing Telemetry Transport) is a lightweight message transport protocol commonly used for communication in the Internet of Things (IoT) and sensor networks. It is designed to transmit data over low-bandwidth, unstable, or high-latency network environments, making it ideal for communication between connected devices, especially in resource-constrained environments. The main features of MQTT include the following: Lightweight: The MQTT protocol itself is very simple, and the message header occupies less bandwidth, making it efficient in low-bandwidth networks. Publish/subscribe model: MQTT uses a publish/subscribe model, in which the client can subscribe to a specific topic (Topic) and receive messages related to the topic. A publisher publishes a message to a specific topic, and all clients subscribed to that topic will receive the message. Reliability: MQTT supports three different levels of message transmission quality, including at most once, at least once and only once transmission. The appropriate level can be selected according to application requirements. Durable sessions: MQTT allows clients to establish persistent sessions so that previous subscription and messaging state can be restored when reconnecting after a connection is lost. QoS (Quality of Service): MQTT provides different QoS levels to…
