#define led  18
#define slideswitch 4
int value =0 ;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(led, OUTPUT);
  pinMode(slideswitch, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  value=digitalRead(slideswitch);
  Serial.print(value);
  digitalWrite(led,value);
  delay(100);
}