Arduino Watchdog Timer

What is the purpose of a Watchdog Timer in Arduino?

• To reset the microcontroller in case of software failures.

• To cook food

• To play music

• To send emails

How can you enable the Watchdog Timer in Arduino?

• enable_watchdog_timer();

• #include

• #include wdt_enable(timeout);

• wdt_enable(timeout);

Explain the process of setting up the Watchdog Timer in Arduino.

• Include , enable with wdt_enable(), reset with wdt_reset(), and disable with wdt_disable().

• Import , enable with rtc_enable(), reset with rtc_reset(), and disable with rtc_disable()

• Use , enable with serial_enable(), reset with serial_reset(), and disable with serial_disable()

• Include , enable with timer_enable(), reset with timer_reset(), and disable with timer_disable()

What are the different configuration options available for the Watchdog Timer in Arduino?

• sleep mode

• refresh rate

• interrupt pin

• timeout period, enable/disable, reset action

How can you adjust the timeout period of the Watchdog Timer in Arduino?

• Connect an external timer to the Arduino board to control the watchdog timer timeout period.

• Adjust the timeout period directly in the Arduino IDE settings.

• Use the watchdog timer library functions like 'wdt_enable(timeout)' to set the timeout period in milliseconds.

• Use the watchdog timer library functions like 'wdt_disable(timeout)' to set the timeout period in milliseconds.

Discuss some common applications of the Watchdog Timer in Arduino projects.

• Using the Watchdog Timer to control the brightness of an LED

• Utilizing the Watchdog Timer for wireless communication between devices

• Employing the Watchdog Timer to measure temperature in a project

• Some common applications of the Watchdog Timer in Arduino projects include resetting the microcontroller in case of a software hang or crash, monitoring the system for unexpected behavior, and ensuring the system operates within specified timing constraints.

What happens if the Watchdog Timer is not reset within the specified timeout period?

• Critical error message is displayed

• System reset is triggered

• System shutdown is initiated

• Watchdog Timer is disabled

How can you reset the Watchdog Timer during program execution?

• Change the clock frequency to reset the Watchdog Timer

• Ignore the Watchdog Timer warnings and continue program execution

• Clear the Watchdog Timer register before it times out by writing a specific sequence of values.

• Restart the microcontroller to reset the Watchdog Timer

Explain the concept of Watchdog Timer 'kicking' in Arduino.

• The Watchdog Timer 'kicking' in Arduino refers to disabling the timer

• The Watchdog Timer 'kicking' in Arduino refers to increasing the timer interval

• The Watchdog Timer 'kicking' in Arduino refers to resetting the timer to prevent it from triggering a system reset.

• The Watchdog Timer 'kicking' in Arduino refers to starting a new timer

Why is the Watchdog Timer considered a critical component in embedded systems design?

• It decreases the system's processing speed

• It increases the power consumption of the system

• It helps prevent system crashes and malfunctions by resetting the system in case of software failures or lock-ups.

• It is only useful for non-embedded systems