86. Watchdog Operation

Question.1

Consider the following Arduino UNO code that utilizes the Watchdog Timer.
What will be printed on the Serial Monitor?

Code

#include <avr/wdt.h>
void setup() {
  Serial.begin(115200);
  delay(1000);
  wdt_enable(WDTO_2S);  // Enable Watchdog Timer with a 2-second timeout
  Serial.println("System started");
}

void loop() {
  Serial.println("Loop iteration started");
  delay(1500);  // Simulating some task
  Serial.println("Task completed");
  delay(1000);  // Another delay
  wdt_reset();  // Reset watchdog timer
  Serial.println("Watchdog Reset!");
}

The following lines will be printed continuously:
```
System started  
Loop iteration started
```

The following lines will be printed continuously:

System started  
Loop iteration started
Task completed

The following line will be printed once:
```
System started
```
After that, the following lines will be printed repeatedly
```
Loop iteration started  
Task completed 
Watchdog Reset! 
```
The following line will be printed once:
```
System started
```
After that, the following lines will be printed repeatedly
```
Loop iteration started  
Task completed
```

Restart quiz!