#define VR 27

void setup(){
  Serial.begin(115200);
}
void loop(){
  int ADCvalue = analogRead(VR);
  float Uvalue = 3.3/4095*ADCvalue;
  Serial.print("Gia tri bien tro: ");
  Serial.println(ADCvalue);
  Serial.print("Gia tri dien ap: ");
  Serial.println(Uvalue);
  delay(500);
}