int inputPin = 4; 
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(4, INPUT);
  Serial.println("Hello, ESP32-S2!");
}

void loop() {
  int val = digitalRead(inputPin);
  if (val == HIGH) {
    Serial.println("Motion detected!");
    }
  else {
    Serial.println("No Motion detected!");
    }
    
delay(100);
}