ESP 32 BLE UART issue

Community General Discussion
1

Hello folks,
I'm using an ESP 32 in BLE mode where I want to use it to fetch data from mobile and respond accordingly much like how we use Serial.available() in other controllers/mode.
The issue is like it has a class mentioned below which helps to receive the data/string/char from bluetooth app.
I want to call this class in my loop statement where I can compare the string in if statement and perform the respective function.

class MyCallbacks: public BLECharacteristicCallbacks {
    void onWrite(BLECharacteristic *pCharacteristic) {
      std::string rxValue = pCharacteristic->getValue();

      if (rxValue.length() > 0) {
        Serial.println("*********");
        Serial.print("Received Value: ");
        for (int i = 0; i < rxValue.length(); i++)
          Serial.print(rxValue[i]);

        Serial.println();
        Serial.println("*********");
      }
    }
2

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