The Complete Beginners Guide to Arduino - 2021 - Temperature and Humidity Display - DHT11

This tutorial demonstrates how to integrate a DHT 11 sensor with an LCD display using Arduino. It covers wiring the components, combining code from separate sketches, and modifying the loop function to display temperature, humidity, and heat index on the LCD. The video also includes troubleshooting and final adjustments to ensure accurate data display.

What is the purpose of adding extra wires to the liquid crystal display circuit?

• To enable wireless communication

• To increase the brightness of the display

• To connect the DHT 11 sensor

• To power the LCD display

Which pin is used for data on a 3-pin DHT 11 sensor?

• Pin 3

• Pin 4

• Pin 1

• Pin 2

What should you do if pin 2 is already used by the LCD?

• Use pin 3 instead

• Change the DHT 11 data pin to pin 6

• Disconnect the LCD

• Use a different sensor

What command is used to clear the LCD screen in the loop function?

• LCD.reset()

• LCD.wipe()

• LCD.clear()

• LCD.erase()

How do you print a degree symbol on the LCD?

• Use LCD.writeChar(223)

• Use ASCII code 176

• Use LCD.symbol(223)

• Use LCD.print('°')

What should be done to avoid strange characters when printing on the LCD?

• Do not use printLn on the LCD

• Use a different font

• Avoid using special characters

• Use printLn instead of print

What is the recommended number of digits after the decimal point for temperature display?

• One digit

• Three digits

• No digits

• Two digits

What is the first step in displaying humidity data on the LCD?

• Change the LCD to serial

• Clear the display and set the cursor

• Print the humidity value

• Adjust the contrast

What should be done if the display shows incorrect data?

• Check the wiring connections

• Restart the device

• All of the above

• Re-upload the code

What is the final step after making all code adjustments?

• Delete the old sketch

• Save the sketch with a new name

• Print the code

• Turn off the device