Relay mode with Sx1276

[davidBaselga]

hi
I implement 4.8.0 with Sx1276 and i had relay mode Rx and Tx.
i used the relay manually (mac command is Ok but for my test i used directly configuration)

  _cfg.cad_period 					= WOR_CAD_PERIOD_1S;
  _cfg.channel_cfg[0].freq_hz		= 865100000;
  _cfg.channel_cfg[0].ack_freq_hz	= 865300000;
  _cfg.channel_cfg[0].dr			= 0;
  _cfg.channel_cfg[1].freq_hz		= 865200000;
  _cfg.channel_cfg[1].ack_freq_hz	= 865400000;
  _cfg.channel_cfg[1].dr			= 0;
  _cfg.nb_wor_channel = 1;
  if( relay_update_config( &_cfg ) == true )
  {
       _cfgTx.second_ch_enable 								= false;
       _cfgTx.activation 										= SMTC_MODEM_RELAY_TX_ACTIVATION_MODE_ED_CONTROLLED;
        _cfgTx.number_of_miss_wor_ack_to_switch_in_nosync_mode = 3;
       _cfgTx.smart_level 										= 8;
       _cfgTx.backoff											= 4;  // 4;
       smtc_modem_relay_tx_enable(STACK_ID, &_cfgTx);
  }

For the Relay (Relay Rx) :

  _cfg.cad_period 					= WOR_CAD_PERIOD_1S;
  _cfg.channel_cfg[0].freq_hz		= 865100000;
  _cfg.channel_cfg[0].ack_freq_hz	= 865300000;
  _cfg.channel_cfg[0].dr			= 0;
  _cfg.channel_cfg[1].freq_hz		= 865200000;
  _cfg.channel_cfg[1].ack_freq_hz	= 865400000;
  _cfg.channel_cfg[1].dr			= 0;
  _cfg.nb_wor_channel = 1;
  if( relay_update_config( &_cfg ) == true )
  {
         relay_start( );
         relay_rx_set_flag_started( true );
  }

The end device send WOR and after JOIN : frame WOR is OK
But the Relay Rx detect CAD and stop the process, WOR message isn't receive.

If I understand the code correctly, it configures the CAD of the SX chip, DIO0 is receive, and CAD_Done is OK. But the module doesn't configure the RX, and the interrupt doesn't seem to be re-activated!

Any ideas?

Thanks.

[davidBaselga]

I compiled the code on a Nucleo L073 with the SX1276 RF chip in relay Rx mode :

cmake -B build/ -G Ninja -DCMAKE_BUILD_TYPE=MinSizeRel -DBOARD=NUCLEO_L073 -DLBM_RADIO=sx1276 -DAPP=periodical_uplink -DLBM_RELAY_RX=ON -DLBM_CMAKE_CONFIG_AUTO=ON
ninja -C build/

When the end-device performs a join, the Relay Rx program panics because of this function:

wake_on_ralio_ral.c file, line 378:

SMTC_MODEM_HAL_PANIC_ON_FAILURE( ral_get_lora_cad_det_peak( &( radio->ral ), sf, ( ral_lora_bw_t ) bw, param->cad_symb_nb, &( param->cad_det_peak_in_symb ) ) == RAL_STATUS_OK );

I see that the function existed on other RF chips and that this function was empty. So I commented out the lines.

J'ai constaté que la fonction existé sur d'autre puce rf et que cette fonction était vide. Du coup j'ai commenté les ligne.
Then it panics again in the relay_rx file, line 1124:
SMTC_MODEM_HAL_PANIC_ON_FAILURE( ral_set_lora_cad_params( &( relay_info.radio->ral ), &cad_param ) == RAL_STATUS_OK );

The ral_set_lora_cad_params function calls ral_sx127x_set_lora_cad_params in my case and returns a status of RAL_STATUS_UNSUPPORTED_FEATURE.

la fonction ral_set_lora_cad_params appelle dans mon cas ral_sx127x_set_lora_cad_params et elle retourne un status RAL_STATUS_UNSUPPORTED_FEATURE.

Is the relay Rx function functional for the sx1276 chip?A nd how can I make it operational?

thanks a lot