====== WDT() ======

''WDT()'' refreshes the Watchdog before its timeout expires.

{{:en-us_commands:reference:wdt.svg?900|WDT command operation flow}}

''void WDT()''

===== Commands =====

^ Command ^ Arguments ^ Return Value ^ Operation ^
| ''WDT()'' | None | ''void'' | Refreshes the Watchdog before its timeout expires. |


===== Example =====

<code cpp>
void setup() {
#if defined(__AVR_ATmega128__)
  WDT_ENABLE(WDT_900MS);  // Set the watchdog timeout and start operation.
#elif defined(__AVR_ATmega2560__)
  WDT_ENABLE(WDT_1S);  // Set the watchdog timeout and start operation.
#endif
}

void loop() {
  WDT();  // Refresh the watchdog before its timeout expires.
}
</code>

===== Precautions =====

  * Use time constants supported by the MCU.
  * Do not set a timeout shorter than the longest normal processing time.
  * Do not hide program faults by placing ''WDT()'' where it always executes unconditionally.

===== Built-in Commands in the Same Category =====

  * [[:en-us_commands:reference:wdt_enable|WDT_ENABLE() View detailed description]]
  * [[:en-us_commands:reference:wdt_disable|WDT_DISABLE() View detailed description]]

[[:en-us_commands:builtin|← Built-in Command List]]