2.0.0-alpha1 BLEScan Compile Error with ESP32S2 Dev Profile

[GaiaBlitz]

Hardware:

Board: Gravitech Cucumber MI (ESP32S2-WROOM-I, using ESP32S2 Dev Module profile)
Core Installation version: 2.0.0-alpha1
IDE name: Arduino IDE 1.8.15
Flash Frequency: 80Mhz
PSRAM enabled: No
Upload Speed: 921600
Computer OS: Windows 10

Description:

I am using my board in a project which utilises BLE scanning, and as such wanted to test whether the board could scan for BLE servers/beacons. However, I came across the below compile error when attempting to compile the "BLE_scan" example code (re-included below) for the board, using the ESP32S2 Dev Module profile in the Arduino IDE.

I tested compiling the same code for ESP32 Dev Module as well as FireBeetle-ESP32 and did not get this error, thus I believe there may be something not right with the ESP32S2 profile as it is not associating the BLE classes as they should be. Is there some means of getting past this error?

Sketch:

/*
   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>

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(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:
  BLEScanResults foundDevices = pBLEScan->start(scanTime, false);
  Serial.print("Devices found: ");
  Serial.println(foundDevices.getCount());
  Serial.println("Scan done!");
  pBLEScan->clearResults();   // delete results fromBLEScan buffer to release memory
  delay(2000);
}

Debug Messages:

BLE_scan:12:1: error: 'BLEScan' does not name a type
 BLEScan* pBLEScan;
 ^~~~~~~
BLE_scan:14:72: error: expected class-name before '{' token
 class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
                                                                        ^
BLE_scan:15:19: error: 'BLEAdvertisedDevice' has not been declared
     void onResult(BLEAdvertisedDevice advertisedDevice) {
                   ^~~~~~~~~~~~~~~~~~~
C:\Users\jiaju\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.0-alpha1\libraries\BLE\examples\BLE_scan\BLE_scan.ino: In member function 'void MyAdvertisedDeviceCallbacks::onResult(int)':
BLE_scan:16:66: error: request for member 'toString' in 'advertisedDevice', which is of non-class type 'int'
       Serial.printf("Advertised Device: %s \n", advertisedDevice.toString().c_str());
                                                                  ^~~~~~~~
C:\Users\jiaju\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.0-alpha1\libraries\BLE\examples\BLE_scan\BLE_scan.ino: In function 'void setup()':
BLE_scan:24:3: error: 'BLEDevice' has not been declared
   BLEDevice::init("");
   ^~~~~~~~~
BLE_scan:25:3: error: 'pBLEScan' was not declared in this scope
   pBLEScan = BLEDevice::getScan(); //create new scan
   ^~~~~~~~
BLE_scan:25:14: error: 'BLEDevice' has not been declared
   pBLEScan = BLEDevice::getScan(); //create new scan
              ^~~~~~~~~
C:\Users\jiaju\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.0-alpha1\libraries\BLE\examples\BLE_scan\BLE_scan.ino: In function 'void loop()':
BLE_scan:34:3: error: 'BLEScanResults' was not declared in this scope
   BLEScanResults foundDevices = pBLEScan->start(scanTime, false);
   ^~~~~~~~~~~~~~
BLE_scan:36:18: error: 'foundDevices' was not declared in this scope
   Serial.println(foundDevices.getCount());
                  ^~~~~~~~~~~~
BLE_scan:38:3: error: 'pBLEScan' was not declared in this scope
   pBLEScan->clearResults();   // delete results fromBLEScan buffer to release memory
   ^~~~~~~~
Multiple libraries were found for "BLEDevice.h"
 Used: C:\Users\jiaju\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.0-alpha1\libraries\BLE
 Not used: C:\Users\jiaju\Documents\Arduino\libraries\ArduinoBLE
exit status 1
'BLEScan' does not name a type

[chegewara]

I hope you know that esp32 S2 does not have bluetooth?

[GaiaBlitz]

Yes, I understand that the S2 does not have Bluetooth, however I am connecting a HM-10 module to it. Would I still have to use another BLE library instead of the BLE library included in the ESP32 package in this scenario?

[chegewara]

Yes. This library works only with internal BLE hardware.

[GaiaBlitz]

I see. Thanks for your quick response @chegewara , and apologies for any inconvenience caused.

[chegewara]

No problem.