#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEScan.h>
#include <BLEAdvertisedDevice.h>

int scanTime = 5; // 扫描时间（单位：秒）
BLEScan* pBLEScan; // BLE 扫描对象指针

// 自定义回调类，用于处理扫描到的 BLE 设备信息
class MyAdvertisedDeviceCallbacks : public BLEAdvertisedDeviceCallbacks {
  void onResult(BLEAdvertisedDevice advertisedDevice) {
    Serial.printf("Advertised Device: %s \n", advertisedDevice.toString().c_str());
  }
};

void setup() {
  Serial.begin(115200);
  Serial.println("Starting BLE scan...");

  BLEDevice::init(""); // 初始化 BLE
  pBLEScan = BLEDevice::getScan(); // 创建新的扫描对象
  pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks()); // 设置回调
  pBLEScan->setActiveScan(true);   // 主动扫描模式（速度更快，但功耗更高）
  pBLEScan->setInterval(100);      // 扫描间隔
  pBLEScan->setWindow(99);         // 扫描窗口（必须 <= interval）
}

void loop() {
  Serial.println("Scanning...");

  // 扫描并获取结果（新版库返回的是指针）
  BLEScanResults* foundDevices = pBLEScan->start(scanTime, false);

  // 输出扫描结果
  if (foundDevices != nullptr) {
    Serial.print("Devices found: ");
    Serial.println(foundDevices->getCount());
  } else {
    Serial.println("No devices found or scan failed.");
  }

  Serial.println("Scan done!");
  pBLEScan->clearResults();   // 清空缓存以释放内存

  delay(2000); // 每2秒重复扫描一次
}