Unable to set 3 differents ANT+ BSC channels.

RE: Unable to set 3 differents ANT+ BSC channels.

Martdur — Tue, 06 Jun 2023 08:19:48 GMT

I was using differents network numbers for every channels, using only one for all seems to fix the issue.

All four channels receive data by now.

Thanks for the help.

RE: Unable to set 3 differents ANT+ BSC channels.

sread — Fri, 02 Jun 2023 20:03:11 GMT

Background scanning channels are typically used for device discovery, not for sensor data. I would recommend reconfiguring your code to use standard RX channels for your sensor data and implementing a separate background scanning channel for device discovery if required. Concurrent searches are expected to be sequential, so depending on the contents of ant_adv_start() this may lead to unpredictable behavior.

If your devices are on the ANT+ network they should use a single network number, this does not need to be unique to the channel. You can call ant_plus_key_set() once for network number 0 and reuse this for all ANT+ channel configurations.

RE: Unable to set 3 differents ANT+ BSC channels.

Martdur — Fri, 02 Jun 2023 09:47:17 GMT

Hi, thanks you both for the quick answer.

I'm not able to receive any data on the last configured channel, I've check the channel in the event callback and log it, it seems that no event is triggered on the last channel.

I'll investigate further in the ant_evt_hanlder(ant_evt_t *p_ant_evt).

Here is my channel configuration :

int profile_setup(void) {
  // Initialize ANT+ HRM and BSC receive channel.
  int err;
  const ant_channel_config_t bsc_channel_config_cadence_speed =
  {
      .channel_number    = CONFIG_BSC_RX_CHANNEL_NUM,
      .channel_type      = BSC_DISP_CHANNEL_TYPE,
      .ext_assign        = EXT_PARAM_ALWAYS_SEARCH,
      .rf_freq           = BSC_ANTPLUS_RF_FREQ,
      .transmission_type = CONFIG_BSC_RX_CHAN_ID_TRANS_TYPE,
      .device_type       = 121,               // Speed and cadence
      .device_number     = 0x00,              // Wild card
      .channel_period    = 0x00,              // This is not taken into account.
      .network_number    = CONFIG_BSC_RX_NETWORK_NUM,
  };
  err = ant_bsc_disp_init(&bsc, &bsc_channel_config_cadence_speed, BSC_DISP_PROFILE_CONFIG(bsc));
  if (err) {
    LOG_ERR("ant_bsc_disp_init failed: %d", err);
    return err;
  }
    const ant_channel_config_t bsc_channel_config_speed =
  {
      .channel_number    = CONFIG_BSC_RX_CHANNEL_NUM_S,
      .channel_type      = BSC_DISP_CHANNEL_TYPE,
      .ext_assign        = EXT_PARAM_ALWAYS_SEARCH,
      .rf_freq           = BSC_ANTPLUS_RF_FREQ,
      .transmission_type = CONFIG_BSC_RX_CHAN_ID_TRANS_TYPE_S,
      .device_type       = 123,             // Only speed
      .device_number     = 0x00,              // Wild card
      .channel_period    = 0x00,              // This is not taken into account.
      .network_number    = CONFIG_BSC_RX_NETWORK_NUM_S,
  };

  err = ant_bsc_disp_init(&bs, &bsc_channel_config_speed, BSC_DISP_PROFILE_CONFIG(bs));
  if (err) {
    LOG_ERR("ant_bsc_disp_init failed: %d", err);
    return err;
  }

  const ant_channel_config_t bsc_channel_config_cadence =
  {
      .channel_number    = CONFIG_BSC_RX_CHANNEL_NUM_C,
      .channel_type      = BSC_DISP_CHANNEL_TYPE,
      .ext_assign        = EXT_PARAM_ALWAYS_SEARCH,
      .rf_freq           = BSC_ANTPLUS_RF_FREQ,
      .transmission_type = CONFIG_BSC_RX_CHAN_ID_TRANS_TYPE_C,
      .device_type       = 122,             // Only cadence
      .device_number     = 0x00,              // Wild card
      .channel_period    = 0x00,              // This is not taken into account.
      .network_number    = CONFIG_BSC_RX_NETWORK_NUM_C,
  };

  err = ant_bsc_disp_init(&bc, &bsc_channel_config_cadence, BSC_DISP_PROFILE_CONFIG(bc));
  if (err) {
    LOG_ERR("ant_bsc_disp_init failed: %d", err);
    return err;
  }

  err = ant_hrm_disp_init(&hrm, HRM_DISP_CHANNEL_CONFIG(hrm), ant_hrm_evt_handler);
  if (err) {
    LOG_ERR("ant_hrm_disp_init failed: %d", err);
  }

#if AUTO_ADV 
   ant_adv_start();
#endif
  return err;
}

With :

CONFIG_BSC_RX_CHANNEL_NUM=2
CONFIG_BSC_RX_NETWORK_NUM=2
CONFIG_BSC_RX_CHAN_ID_TRANS_TYPE =1

CONFIG_BSC_RX_CHANNEL_NUM_S = 3
CONFIG_BSC_RX_CHAN_ID_TRANS_TYPE_S = CONFIG_BSC_RX_CHAN_ID_TRANS_TYPE
CONFIG_BSC_RX_NETWORK_NUM_S = 3

CONFIG_BSC_RX_CHANNEL_NUM_C = 4
CONFIG_BSC_RX_CHAN_ID_TRANS_TYPE_C = CONFIG_BSC_RX_CHAN_ID_TRANS_TYPE
CONFIG_BSC_RX_NETWORK_NUM_C = 4

RE: Unable to set 3 differents ANT+ BSC channels.

Kenneth — Thu, 01 Jun 2023 18:11:56 GMT

Hi, as long as the .channel_number is different for each of the channels you try to initialize you should be good. Maybe you can elaborate a bit what you mean by "not working", do the first 2 channels fail in some way or doesn't the 3rd channel receive any data?

If possible you can in the ant event handlers (e.g. ant_bsc_disp_evt_handler() and/or ant_evt_handler()) check for other events than EVENT_RX, the full list of channel events are listed in ant_parameters.h. This may give some indication what is happening here.

Kenneth

RE: Unable to set 3 differents ANT+ BSC channels.

sread — Thu, 01 Jun 2023 17:00:00 GMT

Hi, I'm from the ANT Wireless development team. Can you describe the problem you're seeing with the 3rd channel?

I did not see any issues when modifying the ANT+ bsc_rx sample to open speed, cadence, and combined ANT+ profile channels to receive data from SimulANT on each channel. More information on your channel configuration would be helpful.