Best Mqtt Server 2026

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Last Updated - 03.02.2026

Best Choice

01

Waveshare

Waveshare RS485 to WiFi/Ethernet,Ethernet to WiFi Converter Module,Rail-Mount RS485 Serial Server, Modbus MQTT Gateway,300~460800 BPS Baudrate,Support TCP/UDP/ARP/ICMP/DHCP/DNS/HTTP/MQTT

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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

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.
Using screw terminals for power input, it supports 5~36V wide range power supply.
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.
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...

47,99 €
02

Waveshare

Waveshare Industrial Grade Serial Server RS232/485 to WiFi and Ethernet, Modbus Gateway, MQTT Gateway, Metal Case, Wail-Mount and Rail-Mount Support

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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

This is an RS232/485 device data acquisitor / IoT gateway designed for industrial environment.
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. Comes with a WiFi antenna by default, you can choose the outdoor WiFi antenna according to your needs. The power supply is not included, it is recommended to use with a 12V Power Adapter.
It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, serial port to HTTPD Client, etc. 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.
Industrial grade metal case design, supports wall-mount and rail-mount installations, small in size, easy to install.

44,99 €
03

EBYTE

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

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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

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

Waveshare RS232/485/422 to RJ45 Ethernet Module, TCP/IP to Serial, with POE Function, Bi-Directional Transparent Transmission, Suitable for Data Acquisition, Intelligent Instrument Monitoring, etc

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9.4

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

User-Defined Heartbeat/Registration Packet. Easy for Cloud Communication and Device Identification. Support NTP Protocol. Getting Network Time Info for serial output or data Upload. Suitable for applications like data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring
The module features RS232/485/422 and Ethernet port with PoE function, uses DC port (outer diameter: 5.5mm, inner diameter: 21mm) and screw terminals for power input. The case with rail-mount support, small in size, easy to install, cost-effective
Support multiple communication modes. Support TCP server/TCP client/UDP mode/UDP multicast. MQTT/JSON to Modbus. More flexible conversion of multiple protocols. Support multi hosts roll polling. Different Network devices will be identified and responded respectively, No more Crosstalk issue while communicating with multi Network devices
Support PoE Ethernet power supply, applicable to IEEE 802.3af PoE standard. Support power supply of terminal block and DC 5.5 power interface, DC 6~36V wide voltage range input. It is suitable for the network upgrade of Modbus and can cooperate with 3D force control modal components
An RS232/485/422 device data acquisitor/IoT gateway designed for industrial environment. It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, RS485 to JSON, etc

36,30 €
05

Waveshare

Waveshare RS232/485/422 to RJ45 Ethernet Module, TCP/IP to Serial, with POE Function, Bi-Directional Transparent Transmission, Suitable for Data Acquisition, Intelligent Instrument Monitoring, etc

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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

User-Defined Heartbeat/Registration Packet. Easy for Cloud Communication and Device Identification. Support NTP Protocol. Getting Network Time Info for serial output or data Upload. Suitable for applications like data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring
The module features RS232/485/422 and Ethernet port with PoE function, uses DC port (outer diameter: 5.5mm, inner diameter: 21mm) and screw terminals for power input. The case with rail-mount support, small in size, easy to install, cost-effective
Support multiple communication modes. Support TCP server/TCP client/UDP mode/UDP multicast. MQTT/JSON to Modbus. More flexible conversion of multiple protocols. Support multi hosts roll polling. Different Network devices will be identified and responded respectively, No more Crosstalk issue while communicating with multi Network devices
Support PoE Ethernet power supply, applicable to IEEE 802.3af PoE standard. Support power supply of terminal block and DC 5.5 power interface, DC 6~36V wide voltage range input. It is suitable for the network upgrade of Modbus and can cooperate with 3D force control modal components
An RS232/485/422 device data acquisitor/IoT gateway designed for industrial environment. It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, RS485 to JSON, etc

23,60 €
06

Independently published

MQTT for System Architects: A Deep Guide to Scalable and Secure IoT Deployments (All-in-One Tech Guidebook for Learning Programming, Web Development, Mobile Apps, Software Tools, and Coding Languages)
9.1

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.
Main highlights

24,06 €
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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9.0

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

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

EBYTE

RS485 to EhtSerial Port Server DC 8-28V NA111-M Modbus Gateway TCP/IP to RTU MQTT HTTP Rail Install Industrial Grade

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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

Supports various Modbus gateways (simple protocol conversion, multi-host mode, storage gateway, configurable gateway); Supports fast access to cloud, OneNET, version 3.1 standard MQTT server; Supports HTTP protocol (GET/POST request);
Supports multiple baud rates; supports DHCP function; supports DNS (domain name resolution) and can customize domain name resolution server;
Support virtual serial interface, support timeout restart function, and the restart time can be adjusted; Support short connection function, short connection interval can be adjusted; Support heartbeat package and registration package function;
Support serial port cache cleaning function; Support access to extranet and LAN; Support hardware recovery factory settings; Support online upgrade function.
RJ45 supports 10M Ethernet interface; Supports multiple working modes (TCP server, TCP client, UDP server, UDP client, HTTPC, MQTTC); Supports three types of configuration methods: configuration tool, website and AT command; server mode supports multiple socket connections

13,07 €
09

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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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

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 €
10

ISTOVO

ISTOVO ET69C02 Ethernet-Netzwerk IP RJ45 zu RS485 Buskonverter für Modbus RTU Master Slave Client Server MQTT PLC

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8.7

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

Betriebsspannung: DC 12 V (DC 6,5 - 25 V)
Arbeitsstrom: 20-25 mA
Arbeitsmodus: UDP, -Client, -Server, Modbus-Slave, Modbus-Master, MQTT

17,04 €