void loop(){
  if (f_wdt==1) {  // wait for timed out watchdog / flag is set when a watchdog timeout occurs
    if(circles <= count){
      //Count reached, lets start our MOSFET

      //Start with Setup our PINS and the millis to compare
      if(f_start==0){
        pinMode(pinGate,OUTPUT); //Set Gate as Output
        pinMode(readGate,INPUT_PULLUP); //Set Read Gate to Pullup will LOW when closed and HIGH when open
        unsigned long startMillis = millis(); //Snapshot of current time
        digitalWrite(pinGate, HIGH); //Output High to MOSFET to open the gate
        f_start = 1; //set setup flag as finished
      }

      //Setup is finished, lets see if we should stop open the MOSFET
      if(f_start==1){
        if(digitalRead(readGate) == LOW) f_done = 1; //We got a signal, lets start new sleep circle
        unsigned long currentMillis = millis(); //Our current Millis
        if ((unsigned long)(currentMillis - startMillis) >= waitTime) f_done = 1;  //Timeout time is reached, lets start new sleep circle
      }

      if(f_done==1){
        digitalWrite(pinGate, LOW);
        // set all used port to intput to save power
        pinMode(pinGate,INPUT);
        pinMode(readGate,INPUT);
        f_start = 0;    // reset setup flag
        f_done = 0;     // reset open circle flag
        count = 0;      // reset sleep cycle count
        f_wdt=0;       // reset watchdog flag
        system_sleep(); // back to sleep little tiny
      }
    } else {
      //Count has not reached Circles yet, just go back to sleep and count up
      count++;
      f_wdt=0;       // reset watchdog flag
      system_sleep(); // back to sleep little tiny
    }
  }
}