#include <Manchester.h>

const int trigPin = 3;  // pin "trig" ATTiny85
const int echoPin = 4;  //pin "echo" ATTiny85
const int LED = 2; // LED ATTiny85

const int seuilMIN = 3;

  #define TX_PIN 1  //pin where your transmitter is connected
  uint16_t transmit_data = 2761;
  void setup() {

  pinMode(echoPin, INPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(LED, OUTPUT);
    
  man.setupTransmit(TX_PIN, MAN_1200);
} 
  void loop() {

    long temps, distance;
  
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);


  pinMode(echoPin, INPUT);
  temps = pulseIn(echoPin, HIGH);
  distance = temps * 340/(2*10000);

   if (distance < seuilMIN) {   //when someone is inside then start the L.E.D
    digitalWrite(LED, HIGH);
    man.transmit(transmit_data);
  delay(50);
}
  else {
    digitalWrite(LED, LOW);
    }
  
}