Best Mqtt Server 2026

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Last Updated - 27.03.2026

Best Choice

01

Waveshare

Waveshare RS485 to WiFi/Ethernet Module Rail-Mount Serial Server Modbus MQTT Gateway Supports Transparent Transmission Mode

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9.9

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Using screw terminals for power input, it supports 5~36V wide range power supply. Rail-mount V0 flame-retardant case design, small in size, easy to install. It is suitable for applications like data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring.
This is a RS485 device data acquisitor / IoT gateway designed for industrial environment. It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, RS485 to HTTPD Client, etc. With RS485, WIFI and Ethernet ports, the module can realize functions such as serial to WIFI, serial to Ethernet, Ethernet to WIFI and so on.
The user sends data to the server according to the protocol Send data to different servers without restarting. After the user has set the HTTP header through AT commands or web page, the module can send data to the HTTP server, or obtain data from the HTTP server.
Support Transparent Transmission Mode, Supports TCP Server / TCP Client / UDP Server / UDP Client.Support Modbus TCP And Modbus RTU Interconversion Mode.
Devices can subscribe to other MQTT client messages, and can publish topic information to the server. Supports subscription of 6 messages and publication of 6 topics, wider range of use and more applicable scenarios. Users can view device-related information through terminal devices or cloud platforms.

49,99 €
02

Waveshare

Waveshare RS232/485 to WiFi and RJ45 Ethernet Converter Module with POE Function, Industrial Grade Serial Server, Support Ethernet to WiFi,Serial Port to Ethernet, Modbus Gateway, MQTT Gateway

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9.8

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

This is an RS232/485 device data acquisitor / IoT gateway designed for industrial environment. It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, serial port to HTTPD Client, etc.
RS232/485 To WiFi And Ethernet with PoE Function,Industrial Grade Serial Server, Modbus Gateway, MQTT Gateway
RS232/485 TO WIFI POE ETH Serial Server supports wall-mount and rail-mount installations,industrial grade metal case,small in size, easy to install.Onboard multiple power supply interfaces, supports 6~36V wide range power supply, and PoE function optional.
It is suitable for applications like data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring..
Industrial Grade Serial Server RS232/485 To WiFi And Ethernet Converter with RS232, RS485, WIFI and Ethernet interfaces, the module can realize functions such as serial port to WIFI, serial port to Ethernet, Ethernet to WIFI and so on.

49,69 €
03

EBYTE

EBYTE E07-M1101D-SMA CC1101 433MHz RF Module Transceiver Remote Transmission CC1101 433MHz Receiver and Transmitter

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9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

The measured communication distance can reach 1 km; maximum transmission power of 10 mW, software multi-level adjustable;
Supports the globally license-free ISM 433 MHz band; supports air date rate of 0.3 kbps ~ 500 kbps; supports multiple modulation modes (OOK, ASK, GFSK, 2-FSK, 4-FSK and MSK); independent 64-byte RX FIFO and TX FIFO
Supports RSSI (receive signal strength display) and LQI (link quality indicator); it connects to MCU via 4-wire SPI interface and provides two universal digital output pins with adjustable functions.
Support 1.8V~3.6V power supply, power supply over 3.3V can guarantee the best performance; Industry standard design, support -40~85°C for working over a long time; IPEX and stamp hole optional, good for secondary development and integration;
Application:Home Security Alarm & Keyless Remote Control;Wireless Alarm Security System;Building Automation Solutions;Industrial Grade Wireless Remote Control;Health Products;Advanced Meter Reading Architecture (AMI)Applications in Automotive Industry

5,49 €
Value for Money

04

Waveshare

Industrial RS485 to Ethernet Serial Server Modbus Gateway MQTT Gateway TCP/IP to Serial Module, Supports PoE Ethernet Port Power Supply, with Power and Signal Isolation Protection, Rail Mount

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9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

User-defined heartbeat/registration packet, easy for cloud communication and device identification, NTP protocol support, getting network time info for serial output or data upload
RS485 to RJ45 Ethernet converter support bi-directional transparent data transmission between RS485 and Ethernet, with POE function and electrical isolation, uses screw terminals for power input, rail-mount case design
Multi configuration methods, supports Web browser configuration, obtaining dynamic IP via DHCP, DNS protocol connected domain server address
Modbus gateway support, suitable for Modbus gridding upgrade, can be used with 3D configuration software. Multi communication modes, supports TCP server / TCP client / UDP mode / UDP multicast
MQTT/JSON to Modbus, more flexible conversion between different protocols. Multi hosts roll-polling support, different network devices will be identified and responsed respectively, no more crosstalk issue while communicating with multi network devices

38,50 €
05

Waveshare

RS232/485 to WiFi Ethernet Serial Server Converter, Modbus/MQTT Gateway, Supports Serial to WiFi, Serial to ETH, Ethernet to WiFi, Serial to HTTPD Client etc. DC 6~36V Power Supply

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9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

★Industrial grade serial server RS232/485 to WiFi and Ethernet support TCP server, TCP client, UDP server, UDP client transparent transmission mode
★ Support screw terminal and DC 5.5 power port for power supply, DC 6~36V wide voltage range input. Industrial aluminium alloy case, wall-mount and rail-mount support
★ RS232/485 to WiFi Eth serial device server support AP mode, STA mode, and AP+STA mode multi wireless networking methods, support APLAN, APWAN, Router, and Bridge mode multi wired networking methods
★ RS232/485 Serial to WiFi Ethernet Converter combines serial server, Modbus gateway, MQTT gateway, serial port to HTTPD Client, etc. multi functions in one, with RS232, RS485, WIFI and Ethernet interfaces, support serial port to WIFI, serial port to Ethernet, Ethernet to WIFI, etc.
★ Features multi configuration methods, AT command mode, socket distribution protocol, hardware protection, customised registration packets, heartbeat packets

44,49 €
06

Shelly

Shelly BLU Gateway Bluetooth WiFi Gateway USB-A Dongle Home Automation Compatible with Alexa & Google Home iOS Android App Wireless WiFi Repeater No Hub Required

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14% Off
9.3

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Plug-and-play connection: Compact USB Type-A dongle design for effortless setup - simply connect to a USB power source and connect your Bluetooth devices
Large range: WiFi range up to 30 m indoors and 50 m outdoors, Bluetooth range up to 20 m indoors and 30 m outdoors, depending on local conditions
Easy to install: supports MQTT and scripting – ideal for integration into automation systems such as Home Assistant
Easy and easy to use: low self-consumption (<1 W) and small format (45 × 20 × 8 mm) – discreet addition to any smart home
Bluetooth wireless connection: effortlessly integrates Shelly BLU devices into your existing Shelly smart home ecosystem - for control and monitoring via WiFi, without additional hubs

15,22 € 17,73 €(14% Off off)
07

Waveshare

Waveshare RS232/485 to WiFi and RJ45 Ethernet Converter Module Industrial Grade Serial Server, Support Ethernet to WiFi,Serial Port to Ethernet, Modbus Gateway, MQTT Gateway

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9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

This is an RS232/485 device data acquisitor / IoT gateway designed for industrial environment. It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, serial port to HTTPD Client, etc.
RS232/485 To WiFi And Ethernet,Industrial Grade Serial Server, Modbus Gateway, MQTT Gateway
RS232/485 TO WIFI ETH Serial Server supports wall-mount and rail-mount installations,industrial grade metal case,small in size, easy to install.
It is suitable for applications like data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring..
Industrial Grade Serial Server RS232/485 To WiFi And Ethernet Converter with RS232, RS485, WIFI and Ethernet interfaces, the module can realize functions such as serial port to WIFI, serial port to Ethernet, Ethernet to WIFI and so on.

44,19 €
08

coolwell

RS485 to WiFi/Ethernet (ETH) Converter Module, Rail-Mount Serial Server, Modbus/MQTT Gateway

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9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Support HTTPD Client Mode: After the user has set the HTTP header through AT commands or web page, the module can send data to the HTTP server, or obtain data from the HTTP server
Serial Command Mode: The user sends data to the server according to the protocol; Send data to different servers without restarting
RS485 to WiFi converter with primary Function: Support RS485 To WIFI, RS485 To Ethernet, Ethernet To WIFI, Etc.
RS485 to Ethernet Converter with rail-Mount Serial Server: Industrial Rail-Mount Support, Easy To Install, Compact Size, Cost-Effective
RS485 to ETH converter, support Transparent Transmission Mode: Supports TCP Server / TCP Client / UDP Server / UDP Client

47,99 €
09

Waveshare

RS485 to WiFi/Ethernet Module, Modbus MQTT Gateway, RS485 Serial Server Rail Mount, with RS485, WiFi and Ethernet Ports, Support RS485 to WiFi, RS485 to Ethernet, Ethernet to WiFi etc.

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8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Support MQTT function, support Modbus TCP and Modbus RTU interconversion mode
Support HTTPD Client Mode, after the user has set the HTTP header through AT commands or web page, the module can send data to the HTTP server, or obtain data from the HTTP server
Serial command mode, the user sends data to the server according to the protocol, send data to different servers without restarting
RS485 to WIFI/Ethernet serial server supports RS485 to WIFI, RS485 to Ethernet, Ethernet to WIFI, etc. supports TCP Server / TCP Client / UDP Server / UDP Client
Industrial rail-mount support, easy to install, compact size, cost-effective. Power supply is not included, it is recommended to use a 12V Industrial DIN-Rail Power Supply

47,99 €
10

Waveshare

Waveshare RS485 to RJ45 Ethernet Industrial Serial Server Modbus Gateway TCP/IP to Serial Rail-Mount Support with PoE Ethernet Port and Electrical Isolation Adapter

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8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

This is the hardware upgrade version, support PoE Ethernet port power supply, with power and signal isolation protection, which is safer for industrial applications.
This is a RS485 device data acquisitor / IoT gateway designed for industrial environments. It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, RS485 to JSON, etc.
The module features RS485 and Ethernet port (POE function is optional), uses screw terminals for power input. Rail-mount flame-retardant case design, small in size, easy to install.
It is suitable for applications such as data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring.
Bi-Directional Transparent Data Transmission Between RS485 and Ethernet

38,99 €