Note:

Include M5.update() in the main loop to update the button state, and minimize blocking operations. Otherwise, button state changes may not be detected promptly.

Example

Compilation Requirements

M5Stack board manager version >= 3.3.8
Board option = M5StickCPlus
M5Unified library version >= 0.2.18
M5GFX library version >= 0.2.24

cpp 
#include "M5Unified.h"
#include "M5GFX.h"

static int32_t w;
static int32_t h;
static bool drawed = false;

void setup()
{
    auto cfg = M5.config();
    M5.begin(cfg);
    
    M5.Lcd.setRotation(1);
    w = M5.Lcd.width();
    h = M5.Lcd.height();
    M5.Lcd.setFont(&fonts::FreeMonoBold12pt7b);
    M5.Lcd.drawString("Button Released", 0, 0);
}

void loop()
{
    M5.update();
    if(M5.BtnA.isPressed() || M5.BtnB.isPressed())
    {
        if (!drawed){
            M5.Lcd.clear();
        }
        M5.Lcd.drawString("Button  Detail:", 0, 0);
        if (M5.BtnA.isPressed()) {
            M5.Lcd.drawString("ButtonA Pressed", 0, 30);
        }
        if (M5.BtnB.isPressed()) {
            M5.Lcd.drawString("ButtonB Pressed", 0, 60);
        }
        drawed = true;
    }
    else if (drawed){
        drawed = false;
        M5.Lcd.clear();
        M5.Lcd.drawString("Button Released", 0, 0);
    } 
    vTaskDelay(1);
} 

When a button is pressed, the screen displays its current state.

API

The StickC-Plus SE buttons use Button_Class from the M5Unified library. For more button-related APIs, refer to the documentation below:

M5Unified - Button Class

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