Question

Use Tinkercad or any other tool to implement the following project

You have two Arduinos which are connected using serial cable

Arduino#1 is connected to the following components

1-LCD, , 2-DC motor, 3-Temperature Sensor

Arduino#2 is connected to an Alarm (Buzzer) + LED

You may use other components such as resistors, function generator, power supply, relay, etc.

The system should do the following:

1. Read the temperature every 1.5 seconds (DO NOT USE DELAY).
2. Starting at t=6 seconds, calculate the average temperature (Tavg) during the last 6 seconds. Repeat this process every 1.5 seconds (moving average).
3. Write the Tavg on the LCD.
4. If the Tavg is larger than 29 ̊C, drive a DC motor (fan) with 20% duty cycle. And then increase the speed of the fan with 10% for every 2 ̊C increase above 29. If the temperature goes below 27 C, turn the DC motor off.
5. If the Temperature become more than 35 ̊C, then the alarm will work on Arduino#2 and the LED will be ON

Answer 1

First of all we are connect two arduino in serial communication that is connect tx-rx pin of two arduinos.here i am attach my simulation image..

For 1st arduino interfacing we are using.

Components Required for 1st arduino connection

• Arduino Uno
• L293D Motor Driver IC
• DHT22 Sensor
• 16×2 LCD Display
• DC motor
• 9V Battery
• 10KΩ Potentiometer
• 220Ω Resistor
• Breadboard

For 2nd arduino interfacing we are using.

• 1 x Piezo Buzzer
• 1 x LED
• 1 x 330 Ohm Resistor
• 1 x 10 KOhm Resistor
• 1 x Pushbutton
• Jumper Wires

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Code for arduino 1 .

Code for arduino2.

In above both code we can add tx-Rx connection syntax.And we can change the temperature value in code according to our requirement.