#include <Adafruit_FreeTouch.h>
Adafruit_FreeTouch qt_0  = Adafruit_FreeTouch(A0, OVERSAMPLE_4, RESISTOR_50K, FREQ_MODE_NONE);

#include <TinyUSB_Mouse_and_Keyboard.h>

void setup() {
  Keyboard.begin();
  Serial.begin(115200);

  qt_0.begin();
 }

int qt_Threshold = 850;

void loop() {
  int qt0  = 0;
   qt0  = qt_0.measure();

  if (qt0 >= qt_Threshold) {
    Serial.print("qt0: "); Serial.println(qt0);
    Key2_act();
  }

  //delay(100);
}

void Key2_act() {
  // shut down window
  Keyboard.press(KEY_LEFT_CTRL);
  Keyboard.write('w'); 
  Keyboard.releaseAll();
  KeyRelease();
}

void KeyRelease() {
  Keyboard.releaseAll();
  delay(500);
  digitalWrite(LED_BUILTIN, HIGH);// XIAO HIGH = Off
}

/*Example 
 
  Keyboard.write('a');            //press and release 'a' key
  
  uint8_t Multiple[3]= {'1','2','3'};
  Keyboard.write(Multiple,3);     //multiple keys sequentially from a buffer
  
  Keyboard.print("456");          //print a string
  Keyboard.println("789");        //print another string with a line
  
  Keyboard.press(KEY_LEFT_SHIFT); //hold down the shift
  Keyboard.println("a uppercase sentence"); //this will be all caps
  Keyboard.release(KEY_LEFT_SHIFT);//release the shift
  Keyboard.println ("back to lowercase");
  
  Keyboard.press(KEY_LEFT_SHIFT); //press shift
  Keyboard.println("1234");       //some text
  Keyboard.releaseAll();          //release all
  
  Keyboard.println("1234");       //not shifted
  Keyboard.print("A mistake");  //will attempt to erase this
  delay(1000);
  
  Keyboard.press(KEY_LEFT_CTRL);  //will attempt control-z
  Keyboard.write('z');
  Keyboard.releaseAll();         //release the control key
 */