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Make S-O-S Signal Using ATOM Matrix ESP32
2026-06-16 | By Ron Cutts
License: GNU Lesser General Public License Displays LED Strips Microcontrollers Wifi Arduino ESP32
In this tutorial, we are going to make an S-O-S signal using the ATOM Matrix ESP32.
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 2X "Digital Multi-Source Merger" component
Add "Sequence" 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 set "Color" to aclRed
In the "Elements" window, drag another "Fill Screen" to the left side
Close the "Elements" window
Select "DigitalMultiMerger1" and in the properties window, set "Input Pins" to 3
Select "DigitalMultiMerger2" and in the properties window, set "Input Pins" to 3
Select "Sequence1" and in the properties window set "Repeat" to True
Double click on the "Sequence1" and in the "Elements" window, drag "Repeat" to the left side, and in the Properties window, set "Count" to 3, select "Elements", and click on the 3 dots button
In the New "Elements" window, drag "Digital Period" to the Left side, and in the properties window, set "Delay" to 300
Drag another "Digital Period" to the left side, and in the properties window, set "Delay" to 300
Close the "Elements" window
In the "Elements" window, drag another "Repeat" to the left side, and in the Properties window, set "Count" to 3, select "Elements", and click on the 3 dots button
In the New "Elements" window, drag "Digital Period"
Drag another "Digital Period" to the left side, and in the properties window, set "Delay" to 300
Close the "Elements" window
In the "Elements" window, drag another "Repeat" to the left side and in the Properties window set "Count" to 3, select "Elements" and click on the 3 dots button
In the New "Elements" window, drag "Digital Period" to the Left side, and in the properties window, set "Delay" to 300
Drag another "Digital Period" to the left side, and in the properties window, set "Delay" to 300
Close the "Elements" window
In the "Elements" window, drag another "Period" to the left side, and in the Properties window, set "Delay" to 3000
Close the "Elements" window
In Visuino Connect Components
Connect "Sequence1" > "Repeat1" > "Digital Period1" pin [Out] to "DigitalMultiMerger1" pin [0]
Connect "Sequence1" > "Repeat1" > "Digital Period2" pin [Out] to "DigitalMultiMerger2" pin [0]
Connect "Sequence1" > "Repeat2" > "Digital Period1" pin [Out] to "DigitalMultiMerger1" pin [1]
Connect "Sequence1" > "Repeat2" > "Digital Period2" pin [Out] to "DigitalMultiMerger2" pin [1]
Connect "Sequence1" > "Repeat3" > "Digital Period1" pin [Out] to "DigitalMultiMerger1" pin [2]
Connect "Sequence1" > "Repeat3" > "Digital Period2" pin [Out] to "DigitalMultiMerger2" pin [2]
Connect "DigitalMultiMerger1" pin[Out] to "M5 Stack ATOM Matrix" > "Fill Screen1" pin [Clock]
Connect "DigitalMultiMerger2" pin[Out] to "M5 Stack ATOM Matrix" > "Fill Screen2" 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, then click on the "Compile/Build and Upload" button.
Play
If you power the ATOM Matrix module, The Display will start to show the S-O-S signals.
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
