The Ai-Thinker Ra-01/Ra-02 remains one of the most widely deployed LoRa modules globally. Specifically, the Ra-02 is the version featuring the IPEX (U.FL) antenna connector, making it ideal for professional enclosures and high-gain antenna setups.
Long Product Description
The Ai-Thinker Ra-02 is a high-performance wireless transceiver module based on the Semtech SX1278 chip. Operating in the 433MHz frequency band, it utilizes patented LoRa™ spread spectrum technology to achieve communication distances exceeding 10km in open areas—surpassing traditional FSK and GFSK modules.
Designed for the Internet of Things (IoT), the Ra-02 excels in environments where long range, high interference immunity, and low power consumption are critical. Unlike standard “transparent” serial modules, the Ra-02 uses an SPI interface, providing developers with granular control over RF parameters such as Spreading Factor (SF), Bandwidth, and Error Correction Coding. Its compact SMD package and integrated shielding make it a reliable choice for both industrial-grade production and sophisticated hobbyist projects like Meshtastic nodes or remote sensor networks.
Key Features
- LoRa™ Spread Spectrum Technology: Offers superior anti-interference capabilities and stable long-range data transmission.
- Constant RF Power Output: Maintains consistent +20dBm – 100mW power output even when battery voltage fluctuates.
- High Sensitivity: Exceptional receiver sensitivity as low as -148dBm, allowing for the reception of signals below the noise floor.
- Half-Duplex SPI Communication: High-speed interface compatible with almost all microcontrollers (Arduino, STM32, ESP32, Raspberry Pi).
- Flexible Packet Handling: Supports automatic CRC hardware detection and features a 256-byte payload FIFO.
- Ultra-Low Power: Ideal for battery-powered applications with a deep sleep current of less than 1uA.
