esp32-ble-scan

/*
   Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleScan.cpp
   Ported to Arduino ESP32 by Evandro Copercini
*/

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

BLEScan* pBLEScan;


void print_raw_data(const char* data, size_t size)
{
  for(uint8_t i=0; i<size; i++) {
    Serial.printf("%02X ", data[i]);
  }  
}

class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
  void onResult(BLEAdvertisedDevice advertisedDevice) {
    if (advertisedDevice.haveName()) {
      if (advertisedDevice.getName() == "Mi 10T Lite") {
        // Serial.printf("Advertised Device: %s \n", advertisedDevice.toString().c_str());     
        Serial.printf("Device name: %s, ", advertisedDevice.getName().c_str());     
        Serial.printf(" MAC address: %s, ", advertisedDevice.getAddress().toString().c_str());     

        // Manufacter data:     <company reserved ID (2 bytes LSB first)> + <data>
        print_raw_data(advertisedDevice.getManufacturerData().c_str(), advertisedDevice.getManufacturerData().length());        
        Serial.println();        
      }
    }
  }
};

void setup() {
  Serial.begin(115200);
  Serial.println("Scanning...");

  BLEDevice::init("");
  pBLEScan = BLEDevice::getScan(); //create new scan
  pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
  pBLEScan->setActiveScan(true); //active scan uses more power, but get results faster
  pBLEScan->setInterval(100);
  pBLEScan->setWindow(99);  // less or equal setInterval value
}

void loop() {  
  // put your main code here, to run repeatedly:
  static uint32_t scanTime;
  if (millis() -scanTime > 1000) {
    scanTime = millis();
    BLEScanResults foundDevices = pBLEScan->start(1, false);
    // Serial.print("Devices found: ");
    // Serial.println(foundDevices.getCount());
    // Serial.println("Scan done!");
    pBLEScan->clearResults(); // delete results fromBLEScan buffer to release memory    
  }

}