MQTT - MQTT Ethernet Communication Module APM32F103 - Unit expansion module for development modules M5Stack Botland - Robotic Shop
Waveshare RS485 to WiFi/Ethernet Module, Modbus MQTT Gateway, RS485 Serveur Série Monté sur Rail, avec RS485, WiFi et Ethernet Ports, Support RS485 to WiFi, RS485 to Ethernet, Ethernet to WiFi, etc. :
Virtuino IoT - Arduino Uno Ethernet MQTT gettting started tutorial - YouTube
Waveshare RS485 to WiFi/Ethernet Module, Modbus MQTT Gateway, RS485 Serveur Série Monté sur Rail, avec RS485, WiFi et Ethernet Ports, Support RS485 to WiFi, RS485 to Ethernet, Ethernet to WiFi, etc. :