BDD RT38B01 UHF RS485 DTU RF UART Transceiver Module 433-458MHz

The BDD RT38B01 UHF DTU Transceiver Module is a compact and powerful wireless RS485 data transmission module designed for transparent serial communication over long distances. Operating in the 433-458.5 MHz UHF band, it enables reliable RF data transfer between devices using RS485 BUS and UART serial interfaces, making it ideal for industrial control, automation, and IoT applications.

With a built-in MCU, the RT38B01 requires no complex RF protocol handling-data sent via the serial port is transmitted wirelessly in transparent mode. In open environments, it supports communication distances up to 500 meters at a 10 kbps air rate. The module supports one-to-one and one-to-many communication through configurable IDs, functioning much like a wired RS485 network.

The RT38B01 provides up to 255 selectable channels, adjustable air data rates, and 10 levels of transmit power up to 100 mW (20 dBm). Configuration is done via AT commands during the first three minutes after power-up, ensuring secure and stable operation once deployed.

This module is well-suited for applications such as Modbus devices, smart meters, access control systems, LED controllers, wireless sensors, and smart home systems, where robust and flexible wireless serial communication is required.

Features

• UHF DTU wireless serial transceiver
• Operates in 433-458.5 MHz frequency range
• Long-range wireless transmission up to 500 m (open area)
• Supports RS485 BUS and UART serial communication
• Transparent data transmission (no protocol conversion required)
• Built-in MCU for easy integration
• Up to 255 communication channels
• Adjustable air data rate 10 kbps - 100 kbps
• Maximum transmit power: 100 mW (20 dBm) with 10 power levels
• Supports one-to-one and one-to-many communication
• RS485-like working mode (single device transmits at a time)
• AT command configuration (within first 3 minutes after power-up)
• Stable and interference-resistant UHF performance

Specifications

• Model: RT38B01
• Product Type: UHF DTU RF Transceiver Module
• Interface: RS485 BUS / UART Serial
• Frequency Range: 433 - 458.5 MHz
• Channels: Up to 255
• Transmit Power: Up to 100 mW (20 dBm), 10 adjustable levels
• Air Data Rate: 10 kbps - 100 kbps
• Transmission Distance:
  Up to 500 m (open area, 10 kbps)
• Data Packet Size: Up to 31 bytes per transmission
• Configuration: AT commands (within 3 minutes of power-on)
• Communication Mode: One-to-one / One-to-many
• Operating Principle: Transparent serial transmission

Typical Applications

• RS485 Modbus temperature sensors
• IP PTZ cameras
• LED controllers
• Wireless relays and smart meters
• Industrial data collection systems
• Smart home & home automation
• Access control and identification systems
• Remote monitoring and measurement systems

The BDD RT38B01 UHF RS485 DTU Transceiver is a reliable, easy-to-use solution for extending wired serial communication into robust long-range wireless networks.

What's in the box
1 x BDD RT38B01 UHF RS485 DTU RF UART Transceiver Module 433-458MHz