Microchip Technology RN2903A-I/RM103 Low power long range LoRa transceiver module - RF module - 915 MHz - ASCII command interface over UART - 17.8 x 26.7 x 3.34 mm - 2.1V to 3.6V – [-40°C to +85°C] – Low power consumption - 300 kbps with FSK modulation - 12500 bps with LoRa technology modula