Communication
Boardoza RS485 3V3 Transceiver Breakout Board
The Boardoza RS485 3V3 Transceiver Breakout Board is a compact and reliable communication interface built around the HTC Korea MAX485 RS-485 transceiver. This module is designed for long-distance half-duplex communication, offering automatic flow control, low-power operation, and robust differential signaling for electrically noisy environments. With its stable and interference-resistant communication capabilities, this board is ideal for industrial automation, sensor networks, embedded communication systems, and building management applications.
Where to buy?
1 / 3
Key Features
- Maker-Friendly RS-485 Integration: Easily add long-distance wired communication to Arduino, ESP32, STM32, Raspberry Pi, and more.
- Fully Automatic Flow Control: No need for RE/DE pin handling—just connect TX/RX and start communicating instantly.
- Highly Noise-Resistant Signaling: Differential transmission ensures stable communication over long cables and in noisy environments—ideal for robotics, CNC systems, and industrial setups.
- Native 3.3V Compatibility: Directly interfaces with modern MCUs without requiring extra level shifters.
- Low-Power Design: Suitable for battery-operated IoT systems and remote sensors.
- Fast Data Transmission: Supports communication speeds up to 10 Mbps.
Technical Specifications
- Manufacturer
- HTC Korea
- Model
- MAX485 Input
- Voltage
- 3.3V Voltage Input
- Type
- Screw terminal / 4-pin header
- Interface
- RS-485 (Half-Duplex) Logic
- Level
- 3.3V Data
- Rate
- Up to 10 Mbps Receiver Input
- Range
- ±7V
- Functions
- RS-485 Transceiver Module Operating
- Temperature
- –10°C ~ +70°C Board
- Dimensions
- 40mm × 40mm
Board Pinout
( J1 ) Input Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | TXD | Module TXD Pin |
| 3 | RXD | Module RXD Pin |
| 4 | VCC | Power Input (3.3V) |
( J2 ) Input Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | TXD | Module TXD Pin |
| 3 | RXD | Module RXD Pin |
| 4 | VCC | Power Input (3.3V) |
( J3 ) RS-485 Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | COM | Common Ground |
| 2 | B | Inverting Driver/Receiver Line |
| 3 | A | Non-Inverting Driver/Receiver Line |
( J4 ) RS-485 Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | COM | Common Ground |
| 2 | B | Inverting Driver/Receiver Line |
| 3 | A | Non-Inverting Driver/Receiver Line |
Datasheet
Download (PDF)Support
For technical questions, documentation and issue reports, use the GitHub repository or write to us directly.