Temperature Sensor Sets LED Strip Color

Code

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/* Change the color of the entire LED strip based on the temperature reading */ #include "LEDStrip.h" //The LEDStrip.h library gives your code access to special functions exclusive to the LED Strip LEDStrip strip = LEDStrip(50, 13, 12); //Set up the strip by defining how many pixels (50) and which pins of the microchip are used (always 13 and 12 on Code Lab) void setup() { pinMode(A1,INPUT); //temp sensor in the smaller block of ports with the + and - ports } void loop() { int tempF = analogRead(A1)*0.46; //Create a variable called 'brightness' that is an integer (whole number) if(tempF>80){ //if the temperature is above 80 degrees strip.setPixel(strip.ALL,100,10); //set all pixels to a color value of 100 (red) and brightness level of 10 } else if(tempF>70){ //otherwise if the temperature is above 70 degrees strip.setPixel(strip.ALL,200,10); //set all pixels to a color value of 200 (green) and brightness level of 10 } else{ //otherwise (if the temperature is below 70) strip.setPixel(strip.ALL,1,10); //set all pixels to a color value of 1 (blue) and brightness level of 10 } strip.draw(); //send the setPixel data to the strip delay(500); //wait 500 milliseconds (0.5 seconds) between temperature readings //Note: Setting the brightness level higher may make the temperature readings jump around wildly! } // (c) 2021 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!

Video Notes for Code Lab Users:

  • You will use “50” instead of “15” as the first argument in your LEDStrip function.

  • The second and third arguments of the LEDStrip function (13 and 12) do not need to change. These connections are permanently set on Code Lab.

Use this spectrum to estimate the color values you'll need for your 'setPixel' arguments to achieve your favorite color!

Challenges

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Concepts

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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?




2. Which syntax ends a single code command?