Espressif Systems ESP - What Is the Maximum Supported Broadcast Length of BLE 5.0 Broadcast after It Is Set to Legacy Mode; How Can I Set a BLE Broadcast Package as Unconnectable Package; How Can I Send Bluetooth HCI Commands Directly to ESP32-WROOM-32 D Module through the Serial Port; Does ESP32 Support Transmitting Audio Stream Using A2 DP

Chapter 4. Software framework
4.1.54 What is the maximum supported broadcast length of BLE 5.0 broadcast after it
is set to legacy mode?
• The maximum supported length is 31-byte.
4.1.55 How can I set a BLE broadcast package as unconnectable package?
CHIP: ESP32
• please re󰝗er to the gatt_server demo，and set adv_type as ADV_TYPE_NONCONN_IND.
static esp_ble_adv_params_t adv_params = {
.adv_int_min = 0x20,
.adv_int_max = 0x40,
.adv_type = ADV_TYPE_NONCONN_IND,
.own_addr_type = BLE_ADDR_TYPE_PUBLIC,
//.peer_addr =
//.peer_addr_type =
.channel_map = ADV_CHNL_ALL,
.adv_filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY,
}
4.1.56 How can I send Bluetooth HCI commands directly to ESP32-WROOM-32D mod-
ule through the serial port?
• Please refer to controller_hci_uart_esp32.
• When ESP32 is used as a controller, and the other device serves as a host, HCI commands can be sent to
ESP32 via UART.
4.1.57 Does ESP32 support transmitting audio stream using A2DP?
Yes, please refer to example a2dp_source.
4.1.58 How many devices can be connected at the most as suggested by the White List of
ESP32 Bluetooth LE?
• The maximum supported number is 12.
4.1.59 Can ESP32 Bluetooth LE use PSRAM?
To enable Bluetooth LE to use PSRAM, please go to Component config > Bluetooth > Blue-
droid Options and enable BT/BLE will 󰝘rst malloc the memory from the PSRAM。
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