how to take TMP36 measurements once every 2 seconds for an indefinite duration Arduino

clear
a=arduino;
voltage=readVoltage(a,'A0');
if (voltage>=0.76)
playTone(a,'D9',500,10)
end

I have a buzzer set up to sound if the temperature goes reaches or goes over 80 deg F, or if voltage >=0.76. How can I make the buzzer sound as long as the temperature is over 80 and not just for 10 seconds? How can I program the arduino to take continuous measurements every two seconds?

Answer 1

[Chetan]

Hi @Fadi Serhan,

Based on your requirements:

• You want the buzzer to sound continuously when the temperature is 80°F or above.
• You need the Arduino to take temperature readings every two seconds.

As a solution you can

• Utilize a `while` loop for continuous temperature monitoring.
• Use `playTone` within an `if` statement to sound the buzzer for 2 seconds when the threshold is met.
• Implement `pause(2)` to set the measurement interval.

Here is the sample code for the same:

clear
a = arduino;

% Buzzer settings
buzzerPin = 'D9';
frequency = 500; 

% Monitoring loop
while true
    voltage = readVoltage(a, 'A0');
    if voltage >= 0.76
        playTone(a, buzzerPin, frequency, 2);
    end
    pause(2);
end

You can refer to the following MathWorks documentation for details regarding Arduino functions

• https://www.mathworks.com/help/supportpkg/arduinoio/ref/arduino.html
• https://www.mathworks.com/help/supportpkg/arduinoio/ref/readvoltage.html
• https://www.mathworks.com/help/supportpkg/arduinoio/ref/playtone.html

Best regards,

Chetan Verma