Test ping

/*
 * Define the pins you want to use as trigger and echo.
 */

#define ECHOPIN 2        // Pin to receive echo pulse
#define TRIGPIN 3        // Pin to send trigger pulse

/*
 * setup function
 * Initialize the serial line (D0 & D1) at 115200.
 * Then set the pin defined to receive echo in INPUT
 * and the pin to trigger to OUTPUT.
 */


void setup()
{
  Serial.begin(115200);
  pinMode(ECHOPIN, INPUT);
  pinMode(TRIGPIN, OUTPUT);
  pinMode(11, OUTPUT);

}

/*
 * loop function.
 *
 */
void loop()
{
  // Start Ranging
  digitalWrite(TRIGPIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGPIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGPIN, LOW);
  // Compute distance
  float distance = pulseIn(ECHOPIN, HIGH);
  distance= distance/58;
  Serial.println(distance);//print distance to Serial
  Serial.println("cm");
  if(distance <= 90.00){// if the distance is more than 90cm
    digitalWrite(11, HIGH); //pin 11 0n

    delay(1000);//wait

  }
  if(distance >= 90.00){//if less than 90
    digitalWrite(11, LOW); //pin 11 off


  }
  delay(200);
}