LoRa series modules (Ra - 01 / Ra - 02) by essence can design and development of science and technology, this series of module theRf chip SX1278 mainly adopts LoRa remote modems, used for long distance spread spectrum communication The letter,Resistance toInterfere with strong sex, can maximum limit reduce current consumption.With SEMTECH LoRa are designed The modulationTechnology, with more than 148 DBM SX1278 high sensitivity, + 20 DBM power output the transport distanceFrom far and high reliability.At the same time, relative to the traditional modulation technology, LoRa modulation technology in the fight Blocking and chooseAlso has obvious advantage, solve the traditional design scheme can't both distance, Anti-interference and power consumptionThe problem.Ra, the Ra - 01-02 working frequency 433 m, mainly aimed at 433 m Segment of the region, includingChina and southeast Asia. The module features: LoRa spread spectrum modulation technique •Vast communication distance 15 km + 20 DBM - 100 mw constant rf power output voltage change High sensitivity, low - 148 DBM Half duplex SPI communication Programmable bit rate is as high as 300 KBPS Support for FSK, GFSK, MSK, GMSK, LoRa and baton modulation mode 127 db RSSI dynamic range Rf signal detection, automatic CAD model and super-fast AFC Packet engine with CRC, up to 256 bytes Small size double row stamp hole patch encapsulation With shielding shell Spring antenna (Ra - 01) or IPEX external antenna (Ra - 02) (Different batches may have different printed characters, but it does not affect the use) Color: As Shown 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.