ESP32 MicroPython Quiz

What will happen if we write sensor.temperature() before calling sensor.measure()?

• It will give the last stored value

• It will crash the code

• It will read the new temperature

• It will return random values

Why do we use Pin(5, Pin.OUT) in the LED project?

• To declare a variable

• To set GPIO 5 as a data pin

• To configure GPIO 5 to control a device like an LED

• To read data from a sensor

In the line from (time import sleep), what does sleep actually do?

• Puts the ESP32 to deep sleep mode

• Pauses the program for a short time

• Makes the ESP32 restart

• Turns off GPIO pins

What is the main reason for using (while True:) in MicroPython code on ESP32?

• To check if a sensor is connected

• To run the code only once

• To create a loop that repeats the task continuously

• To save battery power

What is the primary role of try...except in the DHT11 code block?

• To shorten the program

• To retry a command

• To handle errors gracefully and prevent the program from crashing

• To measure temperature automatically

Why is a 2-second delay used after reading DHT11 sensor values?

• The sensor sends data slowly

• To allow the sensor to cool down

• To match the LED blink pattern

• To give the sensor time to stabilize before next reading

What is the difference between Pin.OUT and Pin.IN in the Pin() class?

• Pin.OUT is used for sensors, Pin.IN for motors

• Pin.OUT sends signals out, Pin.IN receives signals in

• Both are the same

• Pin.OUT works with LEDs only

What does the following code do? led = Pin(5, Pin.OUT) led.on() sleep(1) led.off()

• Turns LED on and off quickly

• Turns LED on for 1 second, then off

• Turns LED off immediately

• Causes an error due to missing loop

Why is it wrong to write sensor = dht.DHT11(4) without wrapping 4 in Pin()?

• It saves memory

• DHT11 sensors don’t use digital pins

• The constructor requires a Pin object, not an integer

• It makes the code shorter

What output will you see if you remove the sleep() calls in a blinking LED program?

• LED will blink more slowly

• LED will stay ON permanently

• LED will blink too fast to see properly

• The ESP32 will shut down