LoRa series modules (Ra - 01 / Ra - 02) by essence can design and development of science and technology, this series of module<br> theRf chip SX1278 mainly adopts LoRa remote modems, used for long distance spread spectrum communication<br> The letter,Resistance toInterfere with strong sex, can maximum limit reduce current consumption.With LoRa are designed<br> The modulationTechnology, with more than 148 DBM SX1278 high sensitivity, + 20 DBM power output<br> the port distanceFrom far and high reliability.At the same time, relative to the traditional modulation technology, LoRa modulation technology in the fight<br> <br> Blocking and chooseAlso has obvious advantage, solve the traditional design scheme can't both distance,<br> Anti-interference and power consumptionThe problem.Ra, the Ra - 01-02 working frequency 433 m, mainly aimed at 433 m<br> Segment of the region, includingChina and southeast Asia.<br> The module features:<br> LoRa spread spectrum modulation technique<br> •Vast communication distance 15 km<br> + 20 DBM - 100 mw constant rf power output voltage change<br> High sensitivity, low - 148 DBM<br> Half duplex SPI communication<br> Programmable bit rate is as high as 300 KBPS<br> Support for , GFSK, MSK, GMSK, LoRa and modulation mode<br> 127 db RSSI dynamic range<br> Rf signal detection, automatic CAD model and super-fast AFC<br> Packet engine with , up to 256 bytes<br> Small size double row stamp hole patch encapsulation<br> With shielding shell<br> Spring antenna (Ra - 01) or external antenna (Ra - 02)<br> (Different batches may have different printed characters, but it does not affect the use)<br> Color: As Shown<br> Material: PCB<br> <br> Package Contents:<br> 1 * Module<br> <br> Only the above package content, other products are not included.<br> 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 allow