1. Introducció
This manual provides detailed instructions for the installation, configuration, and operation of the Waveshare RS232/485 to WiFi Ethernet Serial Server Converter. This industrial-grade device functions as a data acquisitor and IoT gateway, supporting various communication protocols and networking methods for robust industrial applications.

Image 1.1: Waveshare RS232/485 to WiFi Ethernet Serial Server Converter and accessories.
2. Informació de seguretat
Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in damage to the device, property, or personal injury.
- Assegureu-vos que la font d'alimentació voltage is within the specified range (DC 6~36V).
- Do not expose the device to moisture or extreme temperatures outside its operating range (-40℃ to 85℃).
- Avoid opening the device enclosure unless instructed by qualified personnel.
- Properly ground the device if required by your application or local electrical codes.
- Desconnecteu l'alimentació abans de fer qualsevol connexió o desconnexió.
3. Contingut del paquet
Verify that all items listed below are present in your package. If any items are missing or damaged, please contact your vendor.
- RS232/485 TO WIFI ETH (B) Converter x1
- Antena WiFi 2.4G x1
- Rail-mount buckle x1
- Tornavís x1
- Screws pack x1
4. Producte acabatview
The Waveshare RS232/485 to WiFi Ethernet Serial Server Converter is designed for industrial environments, featuring a robust metal case and support for wall-mount and rail-mount installations.
4.1 Physical Description and Interfaces

Image 4.1: Interface layout and outline dimensions of the converter.
- Port RS232: DB9 male connector for RS232 serial communication.
- Terminal RS485: Screw terminal block for RS485 communication (A, B, GND).
- Port Ethernet: RJ45 connector for 10/100M auto-negotiation Ethernet.
- Connector d'antena WiFi: SMA connector for the included 2.4G WiFi antenna.
- Entrada d'alimentació: DC 5.5 power port and screw terminal for DC 6~36V power supply.
- Indicadors LED: RELOAD, RXD, TXD, LINK, PWR for status indication.
4.2 RS232 Pinout
| Pin DB9 | Pin RS232 |
|---|---|
| 2 | RXD |
| 3 | TXD |
| 5 | GND |
| 1, 4, 6, 7, 8, 9 | N/C (Not Connected) |
5. Especificacions
| Característica | Especificació |
|---|---|
| Dimensions del producte (L×W×H) | 84.00 × 64.00 × 24.00 mm (3.3 x 3.34 x 0.94 polzades) |
| Pes de l'article | 7 unces |
| Font d'alimentació | DC 6~36V |
| Mètode d'alimentació | DC 5.5 power port, Screw terminal |
| Ethernet | 10 / 100M auto-negotiation RJ45 connector |
| Estàndard WIFI | Compatibilitat amb 802.11b/g/n |
| Banda de freqüència | 2.412 ~ 2.484 GHz |
| Wireless Network Modes | Station / AP / AP+Station Mode |
| Mecanisme de seguretat | WPA-PSK / WPA2-PSK |
| Tipus de xifratge | TKIP / AES |
| Ports sèrie | RS232 (ESD/EFT), RS485 (ESD/EFT/surge protection) |
| Velocitat de transmissió | 300 ~ 460800 bps |
| Bit de paritat | Cap, senar, parell, marca, espai |
| Bit de dades | 5 ~ 9 bits |
| Protocols compatibles | TCP / UDP / ARP / ICMP / DHCP / DNS / HTTP / MQTT |
| Mètodes de configuració | Host, Web browser, Serial AT command |
| Modes de funcionament | Transparent transmission, Serial command, HTTPD Client, Modbus TCP to Modbus RTU |
| Temperatura de funcionament | -40 ℃ ~ 85 ℃ |
| Gamma d’humitat | 5% ~ 95% d'humitat relativa |
6. Configuració
6.1 Muntatge del dispositiu
The converter supports both wall-mount and rail-mount installations. Use the provided rail-mount buckle and screws to secure the device in your desired location.
6.2 Connexió a la font d'alimentació
Connect a DC 6~36V power supply to either the DC 5.5 power port or the screw terminal labeled '6-36V' and 'GND'. Ensure correct polarity.

Image 6.1: Power supply connection options.
6.3 Connexió del port sèrie
- RS232: Connect your RS232 device to the DB9 male port. Refer to the pinout in Section 4.2 for correct wiring.
- RS485: Connect your RS485 device to the A, B, and GND terminals on the screw terminal block.
6.4 Connexió Ethernet
Connect an Ethernet cable from your network switch or router to the RJ45 Ethernet port on the converter.
6.5 WiFi Antenna Installation
Screw the provided 2.4G WiFi antenna onto the SMA connector on the device. Ensure it is securely tightened for optimal wireless performance.
7. Operating Modes and Configuration
The converter supports various operating modes and configuration methods to suit different application requirements.

Imatge 7.1: acabatview of supported operating modes and networking methods.
7.1 Mètodes de configuració
The device can be configured using the following methods:
- Web Navegador: Accedir al dispositiu web interfície introduint la seva adreça IP en a web browser. This provides a graphical user interface for comprehensive configuration.
- Serial AT Command: Connect to the device via its serial port and send AT commands for parameter setup and status queries.
- Host Software: Utilize dedicated host software for configuration.

Image 7.2: Configuration methods and advanced features.
7.2 Modes de funcionament
- Transmissió transparent: Supports TCP Server, TCP Client, UDP Server, and UDP Client modes for direct data transfer between serial and network interfaces.
- Modbus TCP to Modbus RTU Gateway: Enables communication between Modbus TCP devices on the network and Modbus RTU devices on the serial port.
- MQTT Gateway: Facilitates data exchange with MQTT brokers, enabling IoT applications.
- HTTPD Client: Allows the device to send serial data to an HTTP server.
- Serial Command Mode: For direct control and data interaction via serial commands.
7.3 Networking Methods
The device supports various wireless and wired networking methods:
- Sense fil: AP mode, STA mode, and AP+STA mode.
- Amb cable: APLAN, APWAN, Router, and Bridge modes.
8. Solució De Problemes
Aquesta secció ofereix solucions a problemes comuns que podeu trobar.
- El dispositiu no s'encén: Comproveu la font d'alimentació voltage (DC 6~36V) and ensure correct connection to either the DC 5.5 port or screw terminals. Check power cable integrity.
- No network connectivity (Ethernet): Ensure the Ethernet cable is securely connected. Check the LINK LED indicator. Verify network settings (IP address, subnet mask, gateway) in the device configuration.
- No network connectivity (WiFi): Ensure the WiFi antenna is properly installed. Check WiFi settings (SSID, password, security type) in the device configuration. Verify the device is within range of the access point.
- Serial communication issues: Check serial port wiring (RXD, TXD, GND for RS232; A, B, GND for RS485). Verify baudrate, parity, and data bits settings match between the converter and the serial device.
- No es pot accedir web interfície: Ensure the device is powered on and connected to the network. Verify your computer's IP address is in the same subnet as the converter's IP address. Try resetting the device to factory defaults if the IP address is unknown (refer to the reset procedure in the full documentation).
9. Manteniment
To ensure optimal performance and longevity of your Waveshare converter, follow these maintenance guidelines:
- Mantingueu el dispositiu net i lliure de pols. Feu servir un drap suau i sec per netejar-lo.
- Assegureu-vos que hi hagi una ventilació adequada al voltant del dispositiu per evitar el sobreescalfament.
- Comproveu regularment la seguretat i la integritat de totes les connexions dels cables.
- Avoid exposing the device to strong electromagnetic interference.
- Periodically check for firmware updates from the manufacturer's website to benefit from new features and bug fixes.
10. Assistència i garantia
For online development resources, technical support, or any issues not covered in this manual, please contact Waveshare customer support. Refer to the official Waveshare weblloc web per obtenir la informació de contacte i els detalls de la garantia més actualitzats.
Nota: Online Development Resources and Technical Support are provided. Please feel free to contact us if you have any problems.





