rpp0
commented
4 years ago Hi,
This would be great! 1) These parameters have been reverse engineered already by a similar project: see https://github.com/myriadrf/LoRa-SDR/blob/52ec64dddf03eefe17cbb36f34377ab097d0abda/LoRaCodes.hpp at the function sx1272DataChecksum. The reason this function is not yet in this repo is because I wanted to find my own methodology of reverse engineering rather than copying the code. After all, this is a research project. 2) They are available, but indeed ignored for now. It should be trivial to add this check to the test suite. 3) Unfortunately no, the metadata in in the filename for these files. They were transmitted using a RN2483 in explicit header mode.
On Mon, Mar 30, 2020 at 10:16 PM dlz3636 notifications@github.com wrote:
Hello, I'm interested in adding the CRC check for the PHY payload, a feature which is mentioned in the release notes not to be implemented yet. Some questions.. (1) Are any of the standard CRC parameters for Lora known (Polynomial, Init Value, XOR, etc) or is the reason it has not been implemented because these are unknown? (2) In docs/test-results some example payloads are shown with CRC on but the 2 bytes of CRC is not shown in the "pass" result. Are these CRC values available for checking results? (3) Do the cfiles in the gr-lora-samples repository have corresponding meta data files so they can be run in lora_receive_file_nogui.py ? I was unable to get them to decode correctly by modifying the sample rate and frequency offset values given in the readme to the existing meta data file for the example file.
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14droplets
Hello, I'm interested in adding the CRC check for the PHY payload, a feature which is mentioned in the release notes not to be implemented yet. Some questions.. (1) Are any of the standard CRC parameters for Lora known (Polynomial, Init Value, XOR, etc) or is the reason it has not been implemented because these are unknown? (2) In docs/test-results some example payloads are shown with CRC on but the 2 bytes of CRC is not shown in the "pass" result. Are these CRC values available for checking results? (3) Do the cfiles in the gr-lora-samples repository have corresponding meta data files so they can be run in lora_receive_file_nogui.py ? I was unable to get them to decode correctly by modifying the sample rate and frequency offset values given in the readme to the existing meta data file for the example file.