3_5 Serial Print Button Press

Serial Print when a Button is Pressed

Code

The code in the editor below is ready to run! Plug Code Lab Mini in to your computer's USB port with the cable and hit 'Upload Your Code!' to see what it does. Change something in the code, like a delay or pin number. Try to add something new to the program - it's yours to tinker with! You can always press the 'Restore' button to return the code to the working example.

Restore 12 14 18 24 30

Monitor Upload Your Code!

/* "Print" a message on the serial monitor when the button is pressed Don't forget to hit the 'monitor' button on the code editor in the top toolbar to see the serial monitor after you've uploaded your code. */ void setup() { Serial.begin(9600); pinMode(4,INPUT_PULLUP); //button } void loop() { if(digitalRead(4)==LOW){ //if button 4 is pressed... Serial.println("I'm Pressed!"); //print the message on a new line } } // (c) 2023 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense

 

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Success!

Compile errors:

Serial port monitor: Input: Send Close

 

Walkthrough Video

Watch the video for a line-by-line explanation of how the example program works. Then you'll be ready to make some changes of your own!

Challenges

Can you complete the challenges? Change the code in your code editor above. Upload your code to see the effect when you're finished. Complete a challenge? Check it off the list!

Change the message that shows on the serial monitor.

Flip the if statement so that it only shows a message when the button is not pressed. Update the message so it’s a true statement.

Add an ‘else’ statement that shows a different message on the serial monitor when the button isn’t pressed. Hint: use your reference book to look at the format for if-else statements.