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UART To WiFi And Ethernet Module, Embedded UART Serial Server, Industrial WiFi Module, Integrated 802.11b/g/n Module
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The UART-WIFI232-B2 is an industrial-grade embedded module that provides bidirectional transparent transmission between TTL serial (UART), WiFi (802.11b/g/n)...
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The UART-WIFI232-B2 is an industrial-grade embedded module that provides bidirectional transparent transmission between TTL serial (UART), WiFi (802.11b/g/n), and 100 Mbps Ethernet. It functions as a serial server, Modbus gateway, MQTT gateway, and HTTP client, enabling traditional serial devices or MCU-controlled equipment to quickly connect to wireless and wired networks.
Configuration is available via AT commands, a built-in web interface, or host serial port settings, making it flexible for a wide range of IoT and industrial automation applications.
Key Features
- Triple Interface – UART to WiFi, UART to Ethernet, and Ethernet to WiFi bridging
- Transparent Transmission – TCP Server/Client, UDP Server/Client modes
- MQTT Gateway – Subscribe to 6 topics and publish 6 topics simultaneously
- Modbus Gateway – Modbus TCP to Modbus RTU interconversion
- HTTP Client – Send and receive data from HTTP servers
- WebSocket Support – Real-time serial-to-web data interaction
- 100 Mbps Ethernet – Wired network connectivity alongside WiFi
- Multiple WiFi Modes – AP, STA, and AP+STA
- Built-in Web Interface – Configure IP, port, baud rate, and other parameters via browser
- AT Command Support – Query status and set parameters via serial commands
- Registration & Heartbeat Packets – Device identification and connection monitoring
Specifications
- WiFi Standard – 802.11b/g/n
- Ethernet – 100 Mbps
- Serial Interface – UART (TTL)
- WiFi Modes – AP, STA, AP+STA
- Protocols – TCP, UDP, MQTT, HTTP, Modbus TCP/RTU, WebSocket
- Configuration – AT commands, web browser, serial port
Package Contents
- 1× UART-WIFI232-B2 module
- 1× IPX 2.4 GHz 2 dBi antenna
Ideal For
- Industrial IoT gateways and data acquisition
- Connecting legacy serial devices to WiFi/Ethernet networks
- Modbus TCP/RTU protocol conversion
- Remote monitoring and intelligent instrument control
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- baud
- Baud is the signalling rate of a serial connection, often used as the speed setting for UART communication. Matching the baud rate matters because both connected devices must use the same setting for readable data.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- Modbus
- Modbus is an industrial communication protocol used by many meters, sensors, PLCs and automation devices. When a product lists Modbus support, it is generally easier to integrate with existing industrial equipment that speaks the same protocol.
- Modbus RTU
- Modbus RTU is a version of the Modbus protocol that runs over serial wiring, commonly RS485. When a product lists Modbus RTU, it can connect to industrial sensors, meters or drives that use serial Modbus rather than Ethernet.
- Modbus TCP
- Modbus TCP is a version of the Modbus protocol that runs over Ethernet networks. When a product lists Modbus TCP, it can connect to industrial systems that communicate over standard network cabling.
- MQTT
- A lightweight messaging protocol often used for IoT devices to publish and receive data through a server called a broker. It matters for home automation and sensor networks because it is simple, efficient, and widely supported.
- TTL serial
- A simple serial data connection that uses microcontroller logic-level voltages (typically 3.3 V or 5 V) rather than the higher, inverted voltages of computer RS-232. When a device lists TTL serial, it can usually wire straight to a microcontroller's UART pins or to a USB-to-TTL serial adapter, but it needs a level converter before connecting to a true RS-232 port.
- UART
- UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
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