void settimer() {


/* LED pin */
//int led = 14;
/* LED state */
//volatile byte state = LOW;
  // Use 1st timer of 4 (counted from zero).
  // Set 80 divider for prescaler (see ESP32 Technical Reference Manual for more
  // info). 
  timer = timerBegin(2, 80, true);

  /* Attach onTimer function to our timer */
  timerAttachInterrupt(timer, &onTimer, true);
  /* Set alarm to call onTimer function every second 1 tick is 1us
  => 1 second is 1000000us */
  /* Repeat the alarm (third parameter) */
  timerAlarmWrite(timer, 5000000, true);
 /* Start an alarm */
  timerAlarmEnable(timer);
 // Serial.println("start timer");

}

void IRAM_ATTR onTimer(){
EpochTime=EpochTime+1;
  esp_task_wdt_reset();//reset WDT
//Serial.print("EpochTime=");
 //  Serial.println(EpochTime);
  // Increment the counter and set the time of ISR
//  portENTER_CRITICAL_ISR(&timerMux);
//  isrCounter++;
//  lastIsrAt = millis();
//  portEXIT_CRITICAL_ISR(&timerMux);
  // Give a semaphore that we can check in the loop
//  xSemaphoreGiveFromISR(timerSemaphore, NULL);
  // It is safe to use digitalRead/Write here if you want to toggle an output

}