Method init

RemoteIDModule/BLE_TX.cpp:89–129

static BLEMultiAdvertising advert(2);

bool BLE_TX::init(void)
{
    if (initialised) {
        return true;
    }
    initialised = true;
    BLEDevice::init("");

    // setup power levels
    legacy_adv_params.tx_power = dBm_to_tx_power(g.bt4_power);
    ext_adv_params_coded.tx_power = dBm_to_tx_power(g.bt5_power);

    // set min/max interval based on output rate    
    legacy_adv_params.interval_max =  (1000/(g.bt4_rate*7))/0.625;
    legacy_adv_params.interval_min = 0.75*legacy_adv_params.interval_max;
    ext_adv_params_coded.interval_max =  (1000/(g.bt5_rate))/0.625;
    ext_adv_params_coded.interval_min = 0.75*ext_adv_params_coded.interval_max;

    // generate random mac address
    uint8_t mac_addr[6];
    generate_random_mac(mac_addr);

    // set as a bluetooth random static address
    mac_addr[0] |= 0xc0;

    advert.setAdvertisingParams(0, &legacy_adv_params);
    advert.setInstanceAddress(0, mac_addr);
    advert.setDuration(0);

    advert.setAdvertisingParams(1, &ext_adv_params_coded);
    advert.setDuration(1);
    advert.setInstanceAddress(1, mac_addr);

    // prefer S8 coding
    if (esp_ble_gap_set_prefered_default_phy(ESP_BLE_GAP_PHY_OPTIONS_PREF_S8_CODING, ESP_BLE_GAP_PHY_OPTIONS_PREF_S8_CODING) != ESP_OK) {
        Serial.printf("Failed to setup S8 coding\n");
    }

    memset(&msg_counters,0, sizeof(msg_counters));
    return true;
}

#define IMIN(a,b) ((a)<(b)?(a):(b))