esp-idf/examples/bluetooth/bluedroid/classic_bt/bt_discovery

Supported Targets	ESP32

ESP-IDF BT-INQUIRY demo

Demo of Classic Bluetooth Device and Service Discovery This is the demo for user to use ESP_APIs to perform inquiry to search for a target device and then performs service search via SDP.

How to use example

Hardware Required

This example is designed to run on commonly available ESP32 development board, e.g. ESP32-DevKitC.

Configure the project

idf.py menuconfig

Build and Flash

Build the project and flash it to the board, then run monitor tool to view serial output:

idf.py -p PORT flash monitor

(Replace PORT with the name of the serial port to use.)

(To exit the serial monitor, type Ctrl-].)

See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.

Example Description

After the program started, the device will start inquiry to search for a device with Major device type "PHONE" in the Class of Device Field. Then it will cancel the inquiry and started to perform service discovering on this remote device.

Trouble shooting

• Some old BT device doesn't place their device name in EIR, but new devices place their device name in EIR. Users can obtain the peer device name in bt_app_gap_cb ESP_BT_GAP_DISC_RES_EVT event handler or resolve it in EIR just like the function get_name_from_eir does.

• ESP32 places its device name in EIR by default.