AtomS3U Arduino Example Program Compilation & Upload

1. Preparation

• 1.Arduino IDE Installation: Refer to Arduino IDE Installation Guide to complete the IDE installation.
• 2.Board Manager Installation: Refer to Board Manager Installation Guide to complete the M5Stack board manager installation and select the development board M5AtomS3.

2. Download Mode

Press and hold the reset button for about 2 seconds until the internal green LED lights up, then release — the device will enter download mode and be ready for flashing.

3. Port Selection

Connect the device to your computer via USB. After the device enters download mode, select the corresponding port in the Arduino IDE.

4. Program Compilation & Upload

Note: Please set Tools -> USB-CDC On Boot to Enabled in Arduino IDE; otherwise the serial port will not be available. The option location is shown below.

Open Arduino, paste the code below and click the upload button. The sketch will be compiled and uploaded to the AtomS3U.

#include <M5Unified.h>

void setup() {
    M5.begin();
    Serial.begin(115200);    
}

void loop() {
    Serial.println("hello world!");
    delay(2000);
}

After a successful upload, open the serial monitor and set the baud rate to 115200. You should see "hello world!" printed every two seconds.

5. Related Resources

• Arduino Library

  • M5Unified
  • M5GFX

• Arduino API & Examples

  • Button
  • IR NEC
  • RGB LED
  • MIC