esp-idf/examples/bluetooth/bluedroid/ble/ble_ibeacon

ESP-IDF iBeacon demo

From welcoming people as they arrive at a sporting event to providing information about a nearby museum exhibit, iBeacon opens a new world of possibilities for location awareness, and countless opportunities for interactivity between iOS devices and iBeacon hardware.

Using Example

iBeacon is a trademark of Apple Inc.

Before building devices which use iBeacon technology, visit https://developer.apple.com/ibeacon/ to obtain a license.

iBeacon Mode

This example demonstrates iBeacon-compatible BLE advertising, and scanning of iBeacons:

• IBEACON_SENDER: demo to send iBeacon-compatible advertising data.

• IBEACON_RECEIVER: demo to receive and resolve iBeacon advertising data.

Which demo will be run depends on the menuconfig, developers can set it in iBeacon Example Configuration.

The default mode is iBeacon Sender.

Menuconfig

Before compiling the demo，developers also need to configure the project:

idf.py menuconfig

And then enter Component config->Bluetooth->Bluedroid Enable

Because the number of peripherals may be very large, developers can enable the BLE Scan Duplicate Options, the maximum number of devices in scan duplicate filter depends on the free heap size, when the cache is full, it is cleared.

Event Processing

In the iBeacon receiver demo, the scan result will be posted to ESP_GAP_SEARCH_INQ_RES_EVT event:

switch (scan_result->scan_rst.search_evt) {
    case ESP_GAP_SEARCH_INQ_RES_EVT:
    /* Search for BLE iBeacon Packet */
    ......
    break;
    default:
    break;
}

Build and Flash

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

idp.py -p PORT flash monitor

(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 Output

The iBeacon sender will broadcast iBeacon packet after initializing the Bluetooth protocol stack, and the iBeacon receiver will scan the iBeacon packet.

iBeacon Sender

I (384) boot: Loaded app from partition at offset 0x10000
I (384) boot: Disabling RNG early entropy source...
I (386) cpu_start: Pro cpu up.
I (389) cpu_start: Starting app cpu, entry point is 0x40081010
I (0) cpu_start: App cpu up.
I (400) heap_init: Initializing. RAM available for dynamic allocation:
I (406) heap_init: At 3FFAFF10 len 000000F0 (0 KiB): DRAM
I (413) heap_init: At 3FFCCCA8 len 00013358 (76 KiB): DRAM
I (419) heap_init: At 3FFE0440 len 00003BC0 (14 KiB): D/IRAM
I (425) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (431) heap_init: At 40090E58 len 0000F1A8 (60 KiB): IRAM
I (438) cpu_start: Pro cpu start user code
I (120) cpu_start: Starting scheduler on PRO CPU
I (0) cpu_start: Starting scheduler on APP CPU
I (244) BTDM_INIT: BT controller compile version [44d04c1]

I (244) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (624) phy: phy_version: 3910, c0c45a3, May 21 2018, 18:07:06, 0, 0
I (654) IBEACON_DEMO: register callback

iBeacon Receiver

I (384) boot: Loaded app from partition at offset 0x10000
I (384) boot: Disabling RNG early entropy source...
I (385) cpu_start: Pro cpu up.\0x1b[0m
I (389) cpu_start: Starting app cpu, entry point is 0x40081010
I (0) cpu_start: App cpu up.
I (400) heap_init: Initializing. RAM available for dynamic allocation:
I (406) heap_init: At 3FFAFF10 len 000000F0 (0 KiB): DRAM
I (412) heap_init: At 3FFCCC88 len 00013378 (76 KiB): DRAM
I (418) heap_init: At 3FFE0440 len 00003BC0 (14 KiB): D/IRAM
I (425) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (431) heap_init: At 40090E58 len 0000F1A8 (60 KiB): IRAM
I (437) cpu_start: Pro cpu start user code\0x1b[0m
I (120) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (243) BTDM_INIT: BT controller compile version [44d04c1]

I (243) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (633) phy: phy_version: 3910, c0c45a3, May 21 2018, 18:07:06, 0, 0
I (663) IBEACON_DEMO: register callback
I (329203) IBEACON_DEMO: ----------iBeacon Found----------
I (329203) IBEACON_DEMO: Device address:: 30 ae a4 00 42 82
I (329203) IBEACON_DEMO: Proximity UUID:: fd a5 06 93 a4 e2 4f b1 af cf c6 eb 07 64 78 25