Private Sub Senden_Click()
 
  MCO1.PortOpen = True
  MCO1.Output = "Juhui, es funzt"
  MCO1.PortOpen = False
 
End Sub

Private Sub MCO2_OnComm()
 
  Text1 = MCO2.Input
 
End Sub

//This example code is in the Public Domain (or CC0 licensed, at your option.)
//By Evandro Copercini - 2018
//
//This example creates a bridge between Serial and Classical Bluetooth (SPP)
//and also demonstrate that SerialBT have the same functionalities of a normal _
  Serial
 
#include "BluetoothSerial.h"
 
#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif
 
 
byte txx[] ="ABCDEFGHIJ";
 
BluetoothSerial SerialBT;
 
void setup() {
  Serial.begin(115200);
  SerialBT.begin("ESP32test"); //Bluetooth device name
  Serial.println("The device started, now you can pair it with bluetooth!");
}
 
void loop() {
  if (Serial.available()) {
    SerialBT.write(Serial.read());
 
    Serial.println("Gesendet");
    Serial.println(Serial.read());
  }
  if (SerialBT.available()) {
    Serial.write(SerialBT.read());
  }
  delay(20);
}