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Mfr Part # C008-B
ATOM MATRIX ESP32 EVAL BRD
M5Stack Technology Co., Ltd.
Police Lights Using ATOM Matrix ESP32
2026-05-25 | By Ron Cutts
License: GNU Lesser General Public License LED Strips Microcontrollers Wifi Arduino ESP32
In this tutorial, you will see how to make police lights using the ATOM Matrix ESP32.
Watch the video!
Learn more about Visuino: What is Visuino
What You Will Need
Visuino program: Download Visuino
Start Visuino, and Select the Atom Matrix Board Type
Start Visuino as shown in the first picture. Click on the "Tools" button on the Arduino component (Picture 1) in Visuino. When the dialog appears, select "Atom Matrix" as shown in Picture 2
In Visuino, Add Components
Add "Toggle(T) Flip-Flop" component
Add "Delay" component
Add "Sequence" component
Add "Color Value" component
In Visuino Set Components
Select "M5 Stack ATOM Matrix" board, and in the properties window, expand "Modules">"RGB Matrix">"Elements" and click on the 3 dots button
In the "Elements" window, drag "Fill Screen" to the left side and in the properties window select "Color" and click on the Pin Icon and select "Alpha Color SinkPin"
Close the "Elements" window
Double-click on the "ColorValue1" and in the Elements window:
Drag "Set Value" to the left side and in the properties window, set "Color" to clRed
Drag another "Set Value" to the left side
Drag another "Set Value" to the left side and in the properties window, set "Color" to clBlue
Close the Elements window
Select "Sequence1" and in the properties window set "Enabled" to False, click on the Pin icon, and select "Boolean SinkPin"
Double-click on "Sequence1" and in the Elements window:
Drag "Repeat" to the left side, and in the Properties window, select "Elements" and click on the 3 dots button, and in the Elements window, drag 2X "Digital Period" to the left side, and in the Properties window for each, set "Delay" to 50. Close the Elements window
Drag another "Repeat" to the left side, and in the Properties window, select "Elements" and click on the 3 dots button, and in the Elements window, drag 2X "Digital Period" to the left side, and in the Properties window for each, set "Delay" to 50. Close the Elements window
Close the Elements window
In Visuino Connect Components
Connect "M5 Stack ATOM Matrix" > "Button" pin [Out] to "TFlipFlop1" pin [Clock]
Connect "TFlipFlop1" pin [Out] to "Sequence1" pin [Enabled]
Connect "TFlipFlop1" pin [Inverted] to "Delay1" pin [Start]
Connect "Sequence1" > "Repeat1" > "Digital Period1" pin [Out] to "ColorValue1" > "Set Value1" pin [In]
Connect "Sequence1" > "Repeat1" > "Digital Period1" pin [Out] to "ColorValue1" > "Set Value2" pin [In]
Connect "Sequence1" > "Repeat2" > "Digital Period1" pin [Out] to "ColorValue1" > "Set Value3" pin [In]
Connect "Sequence1" > "Repeat2" > "Digital Period1" pin [Out] to "ColorValue1" > "Set Value2" pin [In]
Connect "Delay1" pin [Out] "ColorValue1" pin [Clock]
Connect "ColorValue1" pin [Out] to "M5 Stack ATOM Matrix" > "Fill Screen1" Pin [Color]
Connect "ColorValue1" pin [Out] to "M5 Stack ATOM Matrix" > "Fill Screen1" Pin [Clock]
Generate, Compile, and Upload the Arduino Code
In Visuino, at the bottom, click on the "Build" tab, make sure the correct port is selected, and then click on the "Compile/Build and Upload" button.
Play
If you power the ATOM Matrix module and push the Matrix button, the display will start to flash the red and blue colors like police lights; if you press the Matrix button again, the display will turn off.
Congratulations! You have completed your project with Visuino. Also attached is the Visuino project that I created for this tutorial. You can download it and open it in Visuino: https://www.visuino.eu
Downloads
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