Raspberry Pi and Arduino - Go to The Next Level - Activity 02 - Solution

This tutorial explains how to set up an Arduino to send random temperature data to a Raspberry Pi, which then controls an LED based on the received temperature. The Arduino generates a random temperature every second and sends it via serial communication. The Raspberry Pi reads this data, processes it, and sends commands back to the Arduino to turn the LED on or off depending on the temperature. The tutorial covers the setup and coding for both devices, emphasizing the separation of sending and receiving actions.

What is the purpose of sending random temperature data from the Arduino?

• To calibrate the temperature sensor

• To test the serial communication setup

• To control the LED based on temperature

• To measure the actual room temperature

How does the Arduino ensure it sends temperature data every second?

• By using a while loop

• By using a delay function

• By using a timer interrupt

• By using the Millis function to track time

What command is used to power on the LED on the Arduino?

• HIGH

• ON

• POWER_ON

• LED_ON

What is the role of the 'if' statement in the Arduino code?

• To check if the LED is on

• To verify if data is available to read

• To initialize the serial communication

• To set the temperature threshold

How does the Raspberry Pi process the incoming temperature data?

• By sending it to a cloud server

• By converting it to a float

• By decoding it and casting to an integer

• By storing it in a file

What happens when the temperature is below 15 on the Raspberry Pi?

• The LED is turned off

• The system logs an error

• The LED is turned on

• The temperature is recalibrated

What is verified during the system testing phase?

• The accuracy of the temperature sensor

• The correct response of the LED to temperature changes

• The speed of data transmission

• The power consumption of the system