Change coding rate to 4/6

marchuk.dimaqq · June 29, 2023, 11:22am

Hi, I’m new to LoraWan, I have a question, during end device connections, an error occurred that the coding rate is 4/6. After reading about the error, I learned that chirpstack works according to the standard on 4/5. I flashed the device and everything worked, but I am interested in the possibility to change the coding rate to 4/6?

brocaar · July 3, 2023, 4:10pm

You would need to change the source-code and recompile ChirpStack. The coding-rate is specified per region / per data-rate. E.g.:

github.com

chirpstack/chirpstack/blob/master/lrwn/src/region/eu868.rs#L31


      
          cf_list_max_dr: 5,
          data_rates: [
              (
                  0,
                  DataRate {
                      uplink: true,
                      downlink: true,
                      modulation: DataRateModulation::Lora(LoraDataRate {
                          spreading_factor: 12,
                          bandwidth: 125000,
                          coding_rate: "4/5".into(),
                      }),
                  },
              ),
              (
                  1,
                  DataRate {
                      uplink: true,
                      downlink: true,
                      modulation: DataRateModulation::Lora(LoraDataRate {
                          spreading_factor: 11,

marchuk.dimaqq · July 4, 2023, 7:14am

Thank you very much for your help