1. Introduction
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. Safety Information
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.
- Ensure the power supply 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.
- Disconnect power before making any connections or disconnections.
3. Package Contents
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
- 2.4G WiFi antenna x1
- Rail-mount buckle x1
- Screwdriver x1
- Screws pack x1
4. Product Overview
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.
- RS232 Port: DB9 male connector for RS232 serial communication.
- RS485 Terminal: Screw terminal block for RS485 communication (A, B, GND).
- Ethernet Port: RJ45 connector for 10/100M auto-negotiation Ethernet.
- WiFi Antenna Connector: SMA connector for the included 2.4G WiFi antenna.
- Power Input: DC 5.5 power port and screw terminal for DC 6~36V power supply.
- LED Indicators: RELOAD, RXD, TXD, LINK, PWR for status indication.
4.2 RS232 Pinout
| DB9 Pin | RS232 Pin |
|---|---|
| 2 | RXD |
| 3 | TXD |
| 5 | GND |
| 1, 4, 6, 7, 8, 9 | N/C (Not Connected) |
5. Specifications
| Feature | Specification |
|---|---|
| Product Dimensions (L×W×H) | 84.00 × 64.00 × 24.00 mm (3.3 x 3.34 x 0.94 inches) |
| Item Weight | 7 ounces |
| Power Supply | DC 6~36V |
| Power Supply Method | DC 5.5 power port, Screw terminal |
| Ethernet | 10 / 100M auto-negotiation RJ45 connector |
| WIFI Standard | 802.11b/g/n compliant |
| Frequency Band | 2.412 ~ 2.484 GHz |
| Wireless Network Modes | Station / AP / AP+Station Mode |
| Security Mechanism | WPA-PSK / WPA2-PSK |
| Encryption Type | TKIP / AES |
| Serial Ports | RS232 (ESD/EFT), RS485 (ESD/EFT/surge protection) |
| Baudrate | 300 ~ 460800 bps |
| Parity Bit | None, Odd, Even, Mark, Space |
| Data Bit | 5 ~ 9 bits |
| Supported Protocols | TCP / UDP / ARP / ICMP / DHCP / DNS / HTTP / MQTT |
| Configuration Methods | Host, Web browser, Serial AT command |
| Operating Modes | Transparent transmission, Serial command, HTTPD Client, Modbus TCP to Modbus RTU |
| Operating Temperature | -40℃ ~ 85℃ |
| Humidity Range | 5% ~ 95% relative humidity |
6. Setup
6.1 Mounting the Device
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 Power Supply Connection
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 Serial Port Connection
- 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 Ethernet Connection
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.
Image 7.1: Overview of supported operating modes and networking methods.
7.1 Configuration Methods
The device can be configured using the following methods:
- Web Browser: Access the device's web interface by entering its IP address in 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 Operating Modes
- Transparent Transmission: 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:
- Wireless: AP mode, STA mode, and AP+STA mode.
- Wired: APLAN, APWAN, Router, and Bridge modes.
8. Troubleshooting
This section provides solutions to common issues you might encounter.
- Device not powering on: Verify the power supply 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.
- Cannot access web interface: 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. Maintenance
To ensure optimal performance and longevity of your Waveshare converter, follow these maintenance guidelines:
- Keep the device clean and free from dust. Use a soft, dry cloth for cleaning.
- Ensure adequate ventilation around the device to prevent overheating.
- Regularly check all cable connections for security and integrity.
- 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. Support and Warranty
For online development resources, technical support, or any issues not covered in this manual, please contact Waveshare customer support. Refer to the official Waveshare website for the most up-to-date contact information and warranty details.
Note: Online Development Resources and Technical Support are provided. Please feel free to contact us if you have any problems.
