What are code changes for Indian frequency..?

anudeep · October 10, 2021, 7:06am

Hi Everyone,
I’m very beginner to LORA and meshtastic, I got heltec-v2.1 lora board and somehow I did flashing but can’t able to understand how to change my region frequency(865-867MHz) and corresponding power and channels because as per website default region is USA and also mentioned how to change but I can’t able to understand. I have flashed using firmware file directly instead of VScode way(means compile and upload). Do I really need to change this…? what region I’ve to select in android app…? please help me in setting these things
Thanks in advance

jdstroy · October 10, 2021, 7:25am

github.com

meshtastic/Meshtastic-device/blob/2f7e200bef69ebe684f4af29c109c39541209eb8/src/mesh/RadioInterface.cpp#L19

    
      
          #include "sleep.h"
          #include <assert.h>
          #include <pb_decode.h>
          #include <pb_encode.h>
          
          
#define RDEF(name, freq, spacing, num_ch, power_limit)                                                                           \
              {                                                                                                                            \
                  RegionCode_##name, num_ch, power_limit, freq, spacing, #name                                                             \
              }
          
          
const RegionInfo regions[] = {
              RDEF(US, 903.08f, 2.16f, 13, 0), RDEF(EU433, 433.175f, 0.2f, 8, 0), RDEF(EU865, 865.2f, 0.3f, 10, 0),
              RDEF(CN, 470.0f, 2.0f, 20, 0),
              RDEF(JP, 920.0f, 0.5f, 10, 13),    // See https://github.com/meshtastic/Meshtastic-device/issues/346 power level 13
              RDEF(ANZ, 916.0f, 0.5f, 20, 0),    // AU/NZ channel settings 915-928MHz
              RDEF(KR, 921.9f, 0.2f, 8, 0),      // KR channel settings (KR920-923) Start from TTN download channel
                                                 // freq. (921.9f is for download, others are for uplink)
              RDEF(TW, 923.0f, 0.2f, 10, 0),     // TW channel settings (AS2 bandplan 923-925MHz)
              RDEF(RU, 868.9f, 0.2f, 2, 20),     // See notes below
              RDEF(Unset, 903.08f, 2.16f, 13, 0) // Assume US freqs if unset, Must be last
          };

You don’t see India in the list because it’s not implemented. Perhaps you might be able to contribute the legal limits for radio in India, or even a pull request to fix it, though!

pavrotti · March 3, 2022, 8:21am

github.com

meshtastic/Meshtastic-device/blob/master/src/mesh/RadioInterface.cpp#L77

      
        
             RDEF(KR, 920.0f, 923.0f, 100, 0, 0, true, false),
            
            
 /*
                 ???
              */
             RDEF(TW, 920.0f, 925.0f, 100, 0, 0, true, false),
            
            
 /*
                 https://lora-alliance.org/wp-content/uploads/2020/11/lorawan_regional_parameters_v1.0.3reva_0.pdf
              */
             RDEF(IN, 865.0f, 867.0f, 100, 0, 30, true, false),
            
            
/*
                 https://rrf.rsm.govt.nz/smart-web/smart/page/-smart/domain/licence/LicenceSummary.wdk?id=219752
                 https://iotalliance.org.nz/wp-content/uploads/sites/4/2019/05/IoT-Spectrum-in-NZ-Briefing-Paper.pdf
              */
             RDEF(NZ865, 864.0f, 868.0f, 100, 0, 0, true, false),
            
            
  /*
                 https://lora-alliance.org/wp-content/uploads/2020/11/lorawan_regional_parameters_v1.0.3reva_0.pdf
              */

India frequency is supported now.

Topic		Replies	Views
Changing region code/using custom frequencies? Support	4	1697	January 29, 2021
Hardware region issue Support	2	377	August 18, 2022
Relationship between channels and frequency/SF? Support	3	1598	August 10, 2020
Firmware for TBeam v1.1 for frequency AS920-923 (“AS1”)? Support	3	734	August 4, 2020
Steps to change region/freq Support	4	866	November 8, 2021

What are code changes for Indian frequency..?

Related topics