TimerHandle_t Timer1;
// put function declarations here:
void fTimerCallback(TimerHandle_t timerParams);
void setup() {
  Serial.begin(115200);
  Timer1 = xTimerCreate("timer1",            // name
                        pdMS_TO_TICKS(1000), // Chu kỳ
                        pdTRUE,              // auto reload
                        (void *)1,           // id
                        fTimerCallback);     // callback
                                             // Kiểm tra việc tạo Timer
  if (Timer1 == NULL) {
    Serial.println("Failed to create timer");
    while (1)
      ;
  }
  if (xTimerStart(Timer1, 0) != pdPASS) {
    Serial.println("Failed to start Timer 1");
    while (1)
      ;
  }
}
void loop() {}
// put function definitions here:
void fTimerCallback(TimerHandle_t timerParams) { Serial.println("Timer 1 callback executed"); }