The physical layer of the LoRa (LoRa PHY) is a proprietary standard owned by Semtech and people have been trying to reverse-engineer the LoRa standard for years with projects such as GR-LoRa, and over the year various people have taken over the works and new projects have come with the latest one being the gr-lora_sdr GNU Radio software-defined radio (SDR) implementation of a LoRa transceiver. The project has been conducted in collaboration with the Telecommunication Circuits Laboratory of the EPFL (École Polytechnique Fédérale de Lausanne) in Switzerland, and gr-lora_sdr is available as a module for GNU Radio 3.10 with both Tx and Rx implemented so it can be used with hardware compatible with GNU Radio that works in the ISM bands for LoRa (e.g. 433 MHz, 868 MHz, 915 MHz). Highlights of the gr-lora_sdr project: Sends and receives LoRa packets between USRP-USRP and USRP-commercial LoRa transceiver (tested with Adafruit Feather [...]
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