DRF1278DL1 is a type of long range low rate data radio modem based on SX1278 from Semtech which is designed for operations in the unlicensed ISM (Industrial Scientific Medical) and LPRD bands. Frequency spectrum modulation/demodulation multi-channel operation high bandwidth efficiency and anti-blocking performance make DRF1278DL1 modules easy to realize the robust and reliable wireless link. DRF1278DL1 is a RS232 interface transparent data radio modem which means the module transfers or receives data from the host with preset data format without encoding/decoding needed so the communication between them is transparent.