LoRa series modules (RA-01 / RA-02) feature the SX1278 RF chip and utilize LoRa long-range spread spectrum modulation technology for reliable long-distance communication. These modules offer strong interference resistance and low power consumption. Designed with Semtech LoRa modulation technology, they provide high sensitivity of up to -148 dBm and +20 dBm RF output power. Communication range can reach up to 15 km with high reliability. Compared to traditional modulation methods, LoRa offers superior blocking immunity and selectivity, effectively balancing range, interference resistance, and power efficiency. The modules operate at 433 MHz, optimized for regions including China and Southeast Asia. Key features: - LoRa spread spectrum modulation - Communication distance up to 15 km - +20 dBm (100 mW) constant RF output power - High sensitivity: -148 dBm - Half-duplex SPI interface - Programmable data rate up to 300 kbps - Supports FSK, GFSK, MSK, GMSK, LoRa, and OOK modulation - 127 dB RSSI dynamic range - RF signal detection, automatic CAD, and fast AFC - Integrated packet engine with CRC, supporting payloads up to 256 bytes - Compact dual-row stamp-hole SMT package - Shielded metal enclosure - Spring antenna (RA-01) or IPEX connector for external antenna (RA-02) - Color: As shown - Material: PCB Package includes: 1 x module