//Define touch sensitivity. Greater the value, more the sensitivity.
#define Threshold 40
#define uS_TO_S_FACTOR 1000000  /* Conversion factor for micro seconds to seconds */
#define TIME_TO_SLEEP  10        /* Time ESP32 will go to sleep (in seconds) */

touch_pad_t touchPin;

void callback(){
  //placeholder callback function: on arrive ici quand on est pas en mode sleep
  Serial.println ("-------------------------------------callback");
}

void setup(){
  Serial.begin(115200);
  delay(1000);

 //débranchement
 touch_pad_t pin;
 touchPin = esp_sleep_get_touchpad_wakeup_status();
 switch(touchPin)
  {
    case 3  : configuration(); break;
    default : mesures(); break;
  }
}

void configuration(){
  Serial.println("-------------Configuration");
      //Go to sleep now

         //Setup interrupt on Touch Pad 3 (GPIO15)
touchAttachInterrupt(T3, callback, Threshold);
  //Configure Touchpad as wakeup source
esp_sleep_enable_touchpad_wakeup();
esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);

  Serial.println ("Configuration: go to sleep");
  esp_deep_sleep_start();}
void mesures(){
  Serial.println("-------------Mesures");
    //Setup interrupt on Touch Pad 3 (GPIO15)
touchAttachInterrupt(T3, callback, Threshold);
  //Configure Touchpad as wakeup source
esp_sleep_enable_touchpad_wakeup();
esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
//Go to sleep now
  Serial.println ("Mesures: go to sleep");
  esp_deep_sleep_start();

  }
void loop(){
  Serial.println("-->loop");
  delay (5000);
  Serial.println("<--loop");
}