#include "esp_timer.h"

#define LED_PIN 2


static void oneshot_timer_callback(void* arg);

esp_timer_handle_t oneshot_timer;



void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Ready..");
  pinMode(LED_PIN, OUTPUT);

  //create timer parameters..
  const esp_timer_create_args_t oneshot_timer_args = {
    .callback = &oneshot_timer_callback, //link the call back
    .arg = nullptr, //not passing in anything
    .name = "one-shot" //nice name
  };
  //create timer, not running yet..
  ESP_ERROR_CHECK(esp_timer_create(&oneshot_timer_args, &oneshot_timer));

  //start our one shot timer for 1 second..
  ESP_ERROR_CHECK(esp_timer_start_once(oneshot_timer, 1000000));

}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10);

  
}



//call back for timer..
static void oneshot_timer_callback(void* arg)
{
  int64_t time_since_boot = esp_timer_get_time();
  Serial.printf("One-shot timer called, time since boot: %lld us\n", time_since_boot);
  digitalWrite(LED_PIN, !digitalRead(LED_PIN));//blink on board led..

  //now let's restart the timer..
    //check state of timer and stop it if needed..
    if (esp_timer_is_active(oneshot_timer)) {
      ESP_ERROR_CHECK(esp_timer_stop(oneshot_timer));
    }
    //restart our one shot timer for 1 second..
    ESP_ERROR_CHECK(esp_timer_start_once(oneshot_timer, 1000000));

}