StickC-Plus2 Wakeup

#include <M5StickCPlus2.h>
 
void setup(void) {
    auto cfg = M5.config();
    StickCP2.begin(cfg);
 
    StickCP2.Display.setRotation(1);
    StickCP2.Display.setTextColor(GREEN);
    StickCP2.Display.setTextDatum(middle_center);
    StickCP2.Display.setTextFont(&fonts::Orbitron_Light_24);
    StickCP2.Display.setTextSize(1);
 
    Serial.println("Press Btn to sleep");
    Serial.println("After 5s Wakeup");
 
    StickCP2.Display.drawString("BtnA Sleep 5s", StickCP2.Display.width() / 2,
                                StickCP2.Display.height() / 2);
}
 
void loop(void) {
    StickCP2.update();
 
    if (StickCP2.BtnA.wasPressed()) {
        StickCP2.Power.timerSleep(5);
        // StickCP2.Power.timerSleep(const rtc_time_t& time);
        // StickCP2.Power.timerSleep(const rtc_date_t& date, const rtc_time_t&
        // time);
        // StickCP2.Power.powerOff(); shutdown
    }
}