Semtech

devices LR2021 SDR

Open-Source Firmware Unlocks Hidden SDR Mode in Semtech's LoRa Transceiver

An undocumented ROM command turns Semtech's LR2021 LoRa chip into a 100 MHz to 2.74 GHz SDR, enabling P25 voice and POCSAG decoding on a handheld ESP32-P4 board.

Devices Software Defined Radio