BLE扫描仪无法找到BLE服务器。 （能够检测其他设备，而不是服务器。）（均使用ESP32）

Question

我正在尝试为某些设备制作蓝牙扫描仪。但是，除了我的ESP32 BLE服务器外，我可以检测其他蓝牙设备。我可以使用“ NRF Connect”检测服务器，但无法在串行中显示。我可以知道扫描仪或服务器是一个问题吗？如果是这样，我如何能够纠正它？感谢您抽出宝贵的时间阅读我的问题。

编辑：我意识到原始未经编辑的扫描仪代码允许我查看我的服务器。但是，当恢复到此JSON代码时，它似乎无法检测到我的服务器。

这是扫描仪的代码：

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

int scanTime = 5; //In seconds
BLEScan* pBLEScan;

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("Scanning...");

  BLEDevice::init("");
  pBLEScan = BLEDevice::getScan();//create new scan
  pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks()); 
  pBLEScan->setActiveScan(false); //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:
  BLEScanResults foundDevices = pBLEScan->start(scanTime, false);
  Serial.println("Devices found: ");
  Serial.println(foundDevices.getCount());
  for (int i = 0; i < foundDevices.getCount(); ++i)
  {
    std::string address = foundDevices.getDevice(i).getAddress().toString();
    std::string DeviceName = foundDevices.getDevice(i).getName();
    int Rssi = foundDevices.getDevice(i).getRSSI();
    String data = "{\"""Device Name\":\"" + String(DeviceName.c_str()) + "\""",\"EDID\":\"" + String(address.c_str()) + "\""",\"RTID\":\"FF005802600001F\",\"RSSI\":\"" + int(Rssi) + "\"""}";
    Serial.println(data);    
  }
  Serial.println("Scan done!");
  pBLEScan->clearResults();   // delete results fromBLEScan buffer to release memory
  delay(2000);
}

这是服务器的代码：

#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>
#define SERVICE_UUID        "f84b1b5f-7655-476e-a3d4-a5aba18db511"
#define CHARACTERISTIC_UUID "78afb5d4-a4f8-46ab-99cb-f434f96d21f8"

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

  BLEDevice::init("**********");
  BLEServer *pServer = BLEDevice::createServer();
  BLEService *pService = pServer->createService(SERVICE_UUID);
  BLECharacteristic *pCharacteristic = pService->createCharacteristic(
                                         CHARACTERISTIC_UUID,
                                         BLECharacteristic::PROPERTY_READ |
                                         BLECharacteristic::PROPERTY_WRITE
                                       );

  pCharacteristic->setValue("Hello, my name is ESP32.");
  pService->start();
  // BLEAdvertising *pAdvertising = pServer->getAdvertising();  // this still is working for backward compatibility
  BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
  pAdvertising->addServiceUUID(SERVICE_UUID);
  pAdvertising->setScanResponse(true);
  pAdvertising->setMinPreferred(0x06);  // functions that help with iPhone connections issue
  pAdvertising->setMinPreferred(0x12);
  BLEDevice::startAdvertising();
  Serial.println("Characteristic defined! Now you can read it in your phone!");
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(2000);
}