一、函式庫下載

Library 下載點 https://github.com/nkolban/ESP32_BLE_Arduino

在綠色Code處點選並Download.Zip，然後解壓縮得到 ESP32_BLE_Arduino-master資料夾，將資料夾複製到C:\Program Files (x86)\Arduino\libraries，或者您安裝Arduino的資料夾中\libraries

二、LinkIt7697作為Beacon，ESP32當SCANNER

7697程式碼

線上產生 UUID，本範例使用559f49c4-7072-11eb-9439-0242ac130002

網站網址：https://www.uuidgenerator.net/version1

使用Version 1

/*

  This example configures LinkIt 7697 to send iBeacon-compatbile advertisement data.

  You should be able to search this device with iOS or Android iBeacon tools.

  created Mar 2017

*/

#include <LBLE.h>

#include <LBLEPeriphral.h>

void setup() {

  //Initialize serial and wait for port to open:

  Serial.begin(9600);

  // Initialize BLE subsystem

  Serial.println("BLE begin");

  LBLE.begin();

  while (!LBLE.ready()) {

    delay(100);

  }

  Serial.println("BLE ready");

  // configure our advertisement data as iBeacon.

  LBLEAdvertisementData beaconData;

  // This is a common AirLocate example UUID.

  LBLEUuid uuid("559f49c4-7072-11eb-9439-0242ac130002");

  beaconData.configAsIBeacon(uuid, 01, 02, -10);

  Serial.print("Start advertising iBeacon with uuid=");

  Serial.println(uuid);

  // start advertising it

  LBLEPeripheral.advertise(beaconData);

}

void loop() {

  // The underlying framework will advertise periodically.

  // we simply wait here.

  //

  // You can use iBeacon apps such as

  // "Locate Beacon" by Radius Networks on iOS devices

  // to locate this beacon.

  delay(3000);

}

ESP32

ESP32程式碼： https://youyouyou.pixnet.net/blog/post/119410657

取自小霸王的網站

#include <BLEDevice.h>

#include <BLEUtils.h>

#include <BLEScan.h>

#include <BLEUUID.h>

#include <BLEAdvertisedDevice.h>

#include <BLEBeacon.h>

BLEScan* pBLEScan;

BLEBeacon id;

int scanTime = 6; //In seconds

String reverse(String str) {

  String rev;

  for (int i = str.length() - 1; i >= 0; i--) {

    rev = rev + str[i];

  } 

  return rev;

}

class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks

{

    void onResult(BLEAdvertisedDevice advertisedDevice)

    {

      id.setData(advertisedDevice.getManufacturerData());

      //Print UUID

      Serial.print("UUID :");

      String bUUID = id.getProximityUUID().toString().c_str();

      bUUID = reverse(bUUID);

      Serial.print(bUUID);

      //Print RSSI

      Serial.print(",RSSI :");

      int bRSSI = advertisedDevice.getRSSI();

      Serial.print(bRSSI);

      //Print Major

      Serial.print(",Major :");

      int bMajor = id.getMajor() / 256;

      Serial.print(bMajor);

      //Print Minor

      Serial.print(",Minor :");

      int bMinor = id.getMinor() / 256;

      Serial.print(bMinor);

      Serial.println("");

      //如果找到的UUID相同，且RSSI大於-50時，亮燈

      if ( bUUID == "55f9944c0727-11be-4993-2024-ca310020" && bRSSI >= -110) {

        digitalWrite(2, HIGH);

        Serial.println("找到設備了，就在這裡");

      } else {

        digitalWrite(2, LOW);

        Serial.println("沒找到或遠了點");

      }

    }

};

void setup() {

  Serial.begin(115200);

  BLEDevice::init("");

  pBLEScan = BLEDevice::getScan(); //create new scan

  pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());

  pBLEScan->setActiveScan(true);

  Serial.println("Scanning...");

  pinMode(2, OUTPUT);

}

void loop()

{

  BLEScanResults foundDevices = pBLEScan->start(scanTime);

  Serial.print("Devices found: ");

  Serial.println(foundDevices.getCount());

  Serial.println("Scan done!");

  pBLEScan->clearResults(); // delete results fromBLEScan buffer to release memory

  delay(2000);

}

三、結果

實測影片