SKU: IOWC-0058
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AI-Thinker RA-02 LoRa SX1278 Wireless Module 410-525MHz

₹529.00 (Inclusive of all taxes)
Out of Stock

The AI-Thinker RA-02 is a long-range LoRa wireless module based on the Semtech SX1278 transceiver, operating in the 410-525MHz band and supporting SPI communication for integration into Arduino, Raspberry Pi, or custom embedded IoT nodes.

Features

  • Based on Semtech SX1278 LoRa transceiver for robust, long-distance communication up to 10km.
  • Operates across a wide 410-525MHz frequency range, suitable for global sub-GHz ISM bands.
  • High RF output power up to +20dBm (100mW) coupled with exceptional -148dBm receiver sensitivity.
  • Supports multiple modulation schemes including LoRa, FSK, GFSK, MSK, GMSK, and OOK for application flexibility.
  • Compact SMD-16 footprint with IPEX antenna connector and shielded housing for reliable deployment.

Out of stock

Description

The AI-Thinker RA-02 module leverages Semtech’s patented LoRa spread spectrum modulation to deliver exceptional range and interference immunity, making it ideal for low-power, wide-area network (LPWAN) applications. Its architecture enables stable RF power output up to +20dBm while maintaining high receiver sensitivity down to -148dBm, ensuring reliable links in noisy urban or rural environments.

Communication is handled via a half-duplex SPI interface, allowing for programmable bit rates up to 300kbps and seamless integration with common microcontrollers like ESP32, STM32, or Arduino boards. The module features automatic RF signal detection, CAD mode for efficient power cycling, and a packet engine with CRC, simplifying firmware development for sensor telemetry and command/control systems.

Key Features

  • Long-range LoRa spread spectrum technology for distances up to 10,000 meters in open areas.
  • Constant +20dBm RF output power maintained across the 2.5V to 3.7V supply voltage range.
  • High dynamic range (127dB RSSI) and support for FSK, GFSK, MSK, GMSK, LoRa, and OOK modulation.
  • Integrated packet engine with CRC and up to 256-byte payloads simplifies data framing.
  • Automatic Channel Activity Detection (CAD) and high-speed AFC enable ultra-low power listening.
  • Compact, shielded SMD package with stamp-hole pins for robust mechanical and EMI performance.
  • IPEX antenna connector allows for easy attachment of external antennas to optimize gain and pattern.

Applications

  • Smart meter reading and utility monitoring networks.
  • Smart home automation, security sensors, and burglar alarm systems.
  • Agricultural and environmental sensor telemetry (soil moisture, weather stations).
  • Industrial IoT (IIoT) for remote asset monitoring and telemetry.
  • Long-range asset tracking and fleet management solutions.

Technical Specifications

Wireless TransceiverSemtech SX1278
Wireless ProtocolLoRa, FSK, GFSK, MSK, GMSK, OOK
Frequency Range410 - 525 MHz
RF Transmit PowerUp to +20 dBm (100mW)
Receiver SensitivityDown to -148 dBm (LoRa)
Supply Voltage2.5V - 3.7V DC
Communication InterfaceSPI (Half-Duplex)
Data RateProgrammable up to 300 kbps
Antenna ConnectorIPEX (U.FL)
Operating Temperature-10°C to +85°C
Dimensions16mm (W) x 17mm (L)

Frequently Asked Questions

How do I connect the RA-02 module to an Arduino or ESP32 development board?

Connect the RA-02's SPI pins (SCK, MISO, MOSI, NSS) to corresponding SPI pins on your microcontroller. Ensure the NSS (chip select) pin is configured as a digital output. Provide a stable 3.3V power supply and connect a suitable 410-525MHz antenna to the IPEX connector. Use libraries like RadioLib or the SX1278 LoRa library to handle SPI communication and LoRa packet configuration within your Arduino IDE or PlatformIO project.

What is the typical current consumption of the RA-02 module during transmission and reception?

At maximum +20dBm output power, the SX1278 transceiver can draw approximately 120mA during transmission. In receive mode, current consumption is typically around 10-15mA. The module supports low-power sleep modes, drawing only microamps, which is critical for battery-powered IoT nodes. Utilize the built-in CAD mode and deep sleep commands to minimize average current draw for long-term deployments.

Can I change the operating frequency and LoRa spreading factor of the RA-02 module via software?

Yes, the operating frequency (within 410-525MHz), spreading factor (SF7 to SF12), bandwidth (e.g., 125kHz, 250kHz, 500kHz), and coding rate are fully configurable via SPI registers. Use the SX1278 library to set these parameters before starting communication. A lower spreading factor increases data rate but reduces range and link robustness, allowing you to optimize for your specific application's range versus throughput requirements.

Package Includes

  • 1 x AI-Thinker RA-02 LoRa Module

Additional Information

Weight 0.006 kg
Dimensions 1.7 × 1.6 cm