The SX1278 LoRa spread spectrum wireless module uses the LoRa series module Ra-02. The interface is compatible with the NRF24L01 module. If you want to transmit data over long distances, you can directly replace the NRF24L01 by changing the program without changing the hardware design. The RF chip SX1278 of the LoRa series module (Ra-01/Ra-02) mainly uses the LoRa long-range modem for ultra-long-distance spread spectrum communication, with strong anti-interference and the ability to minimize current consumption. With 's LoRa patented modulation technology, the SX1278 has a high sensitivity of more than -148dBm, a power output of +20dBm, a long transmission distance and high reliability. At the same time, compared with traditional modulation technology, LoRa modulation technology also has obvious advantages in anti-blocking and selection, solving the problem that traditional design solutions cannot take into account distance, anti-interference and power consumption at the same time. Ra-01, Ra-02 operating frequency 433M, mainly for areas with 433M network segments, including China and Southeast Asia. SX1278 features: LoRa spread spectrum modulation technology Ultra-long communication distance 15KM +20dBm-100mW constant RF power output when voltage changes High sensitivity: as low as -148dBm Half-duplex SPI communication Programmable bit rate up to 300kbps Support , GFSK, MSK, GMSK, LoRa and OOK modulation 127dB RSSI dynamic range Automatic RF signal detection, CAD mode and ultra-high-speed AFC With , up to 256 bytes of data packet engine Small size dual-row stamp hole patch package With shielding shell IPEX external antenna interface (without antenna) Due to different batches, there may be differences in product appearance, color, and printed text, which no affect the use. Colour:Blue Material:PCB Package Contents: 1 * Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.