The Ra-02 module is a compact LoRa transceiver based on the Semtech SX1278 chip, operating in the 433 MHz band. It uses spread spectrum modulation for ultra-long-range communication with minimal power consumption. Ideal for remote sensing, smart agriculture, and low-bandwidth mesh networks.

Specifications

• Chipset: Semtech SX1278
• Frequency Band: 433 MHz (ISM band)
• Communication Distance:
  • Up to 10 km (line-of-sight, low-interference conditions)
• Modulation Modes:
  • LoRa™, FSK, GFSK, MSK, GMSK, OOK
• Data Rate:
  • Programmable up to 300 kbps
• Sensitivity:
  • Down to –148 dBm
• Transmit Power:
  • Up to +20 dBm (100 mW)
• Interface:
  • SPI (half-duplex)
• Voltage Range:
  • 1.8 V to 3.7 V (3.3 V recommended)
• RSSI Range:
  • 127 dB dynamic range
• Operating Temperature:
  • –40 °C to +80 °C

Features

• LoRa™ spread spectrum modulation for long-range, low-power communication
• High sensitivity and strong anti-jamming performance
• Shielded metal housing for RF stability
• Stamp-hole dual-row package for easy PCB integration
• Supports air wake-up and CAD (Channel Activity Detection) modes
• Ideal for smart home, meter reading, alarm systems, and remote telemetry
• Compatible with Arduino, STM32, ESP32, and other SPI-capable MCUs

Library: Sandeep Mistry's LoRa Library