DX-SMART DX-LR02 LoRa Module 433MHz UART Wireless Transceiver up to 5 km

DX-SMART LR02-A LoRa Wireless Transceiver Module

The DX-SMART LR02-A is a compact, low-power LoRa wireless transceiver module based on the ASR6601 SoC. It is designed for long-range data communication in IoT, industrial automation, remote control, data acquisition, and embedded applications. The module integrates a 32-bit ARM STAR Core operating at up to 48 MHz and supports UART transparent transmission. Configuration is performed through a comprehensive set of AT commands, without requiring custom LoRa firmware.

Key Features

• ASR6601 SoC
• 32-bit ARM STAR Core with a maximum frequency of 48 MHz
• UART transparent data transmission between devices
• Baud rates: 1200, 2400, 9600, 19200, 38400, 57600, 115200, and 128000 bps
• AT command interface for configuration
• Configurable frequency, channel, MAC address, bandwidth, spreading factor, coding rate, transmit power, and operating mode
• Operating frequency range: 410–493 MHz
• Transmit power: up to +22 dBm
• Receiver sensitivity: down to -138 dBm
• Supports Sleep Mode and Wake on Air
• Communication range: up to 5 km in open line-of-sight conditions
• Operating voltage: 3.3–5.5 V (5 V typical)
• Dimensions: 36 × 16.5 × 4 mm
• CE, FCC, and RoHS compliant

Communication Modes

The module supports three LoRa communication modes:

• Transparent Transmission: point-to-point communication between two modules configured on the same channel.
• Fixed-Point Transmission: communication with specific modules using configured addresses and channels.
• Broadcast Transmission: data transmission to designated modules operating on the corresponding channel.

AT Command Interface

Common AT commands include:

• AT – tests the module and returns OK
• +++ – enters/exits AT command mode
• AT+BAUD – sets or queries the baud rate
• AT+MODE – sets or queries the operating mode
• AT+SLEEP – sets or queries the power-saving mode
• AT+CHANNEL – sets or queries the communication channel
• AT+MAC – sets or queries the device address
• AT+POWE – sets or queries the transmit power
• AT+IQ – configures IQ signal inversion

Applications

The DX-SMART LR02-A is commonly used in:

• IoT and smart device applications
• Industrial automation and control
• Remote motor control
• Wireless sensor networks
• Data acquisition systems
• Agricultural and farm monitoring
• Remote equipment monitoring
• Long-distance serial data transmission
• Embedded and MCU-based projects
• DIY and development projects

Pin Interface

• MO – reserved/customizable I/O
• M1 – reserved/customizable I/O
• UART_RX (PXD) – UART receive
• UART_TX (TXD) – UART transmit
• AUX – auxiliary interface
• VCC – 3.3–5.5 V power supply
• GND – ground

Correct polarity and wiring should be verified before powering the module.

Range Note

Actual communication range depends on antenna performance, installation height, line-of-sight conditions, interference, environmental factors, and configuration parameters.