Datasheet

6
You can directly use a digital pin, take D5 of base shield as an example, and connect LED to Pin
12.
const int ledPin=12;
void setup() {
Serial.begin(9600);
pinMode(ledPin,OUTPUT);
}
void loop() {
int sensorState = digitalRead(5);
Serial.println(sensorState);
delay(1000);
if(sensorState == HIGH)
{
digitalWrite(ledPin,HIGH);
}