Description Unit MQTT is an Ethernet MQTT communication module with an embedded W5500 Ethernet chip. It uses a UART communication interface controlled by AT commands and integrates an RJ45 adaptive 10/100M Ethernet port for stable wired Ethernet communication. The module supports 4 Topic subscriptions and is designed for low-latency, high-stability MQTT communication. It is suitable for remote data collection, device data cloud upload, industrial automation, security monitoring systems, and automatic measurement and control systems. Features W5500 Ethernet controller: integrates an embedded W5500 Ethernet chip. RJ45 Ethernet port: supports adaptive 10/100Mbps wired Ethernet connection. Ethernet MQTT communication: designed for MQTT data transmission over wired Ethernet. 4 Topic subscriptions: supports up to 4 MQTT Topic subscriptions. Low latency: official specification lists latency as
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