Show Turn Knob Readings on the Serial Monitor

Use the ‘Parts List’ image along with the component cards in your box to correctly plug in the electronic hardware to your Maker Board. The colorful dots next to the legs of the components match up to the ports where that leg should go on Maker Board’s ports.

Code

The code in the editor below is ready to run! Plug in the electronic components just like the Parts List card above, connect Maker Board to your computer's USB port with the cable, and hit 'Upload Your Code!'. Tinker with the code and change something! If you get stuck, you can hit the 'Restore' button to make the code go back to the working example.

/* Use the serial monitor to see the values that a turn knob sends in to your code Remember to hit the 'Monitor' button next to the dropdown menu on the code editor to open the serial monitor */ void setup() { pinMode(A2,INPUT); //turn knob in the smaller block of ports with + and - ports Serial.begin(9600); //set the serial port up to receive data } void loop() { Serial.println(analogRead(A2)); //"Print" the value from the turn knob on the serial monitor } // (c) 2019 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense

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 challenge? 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!

Add a Serial.print function just above the Serial.println(); function in the loop so that you have a label that says “Knob Reading: “ before the number value from the sensor is shown.

Add an ‘if’ statement so that if the light reading goes below 500, a message like “It’s dark!” shows on the serial monitor. This is a tough one, you may want to revisit the ‘Serial Print Button Press’ project from chapter 3 for clues.

Concepts

These are the new code concepts covered in this example program. To become a great coder, read through these concepts to learn new vocabulary.

Quiz

If you're having trouble, try to run an experimental program or look at the example code to help you find the answer.

1. Which syntax ends the entire 'void loop' function?

semicolon ;
parentheses )
closing curly brace }

2. Which syntax ends a single code command?

semicolon ;
closing curly brace }
period .

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