Tough Wakeup (Sleep and Wake)

Tough sleep and wakeup related APIs and example programs.

Example Program

Build Requirements

• M5Stack Board Manager version >= 2.1.4
• Board selection = M5Tough
• M5Unified library version >= 0.2.5
• M5GFX library version >= 0.2.7

#include <M5Unified.h>
#include <M5GFX.h>
 
int myIndex = 0;
 
void setup() {
  M5.begin();
  M5.Display.setRotation(1);
  M5.Display.setFont(&fonts::FreeMonoBold12pt7b);
 
  M5.Display.clear();
  M5.Display.print("Sleep & Wakeup Test\n");
}
 
void loop() {
  myIndex++;
 
  M5.Display.setCursor(0, 50);
  M5.Display.printf("   %4d", myIndex);
  delay(50);
 
  if (myIndex % 20 == 0) {
    // M5.Power.timerSleep(5);              // in seconds
    // M5.Power.deepSleep(5000000, false);  // in microseconds
    M5.Power.lightSleep(5000000, false);    // in microseconds
 
    M5.Display.setCursor(0, 0);
    M5.Display.print("Sleep & Wakeup Test\n");
  }
  if (myIndex >= 1000) {
    myIndex = 0;
  }
}

This program displays a counter that starts from 0 and increments by 1. Every time it reaches a multiple of 20, the device enters light sleep for 5 seconds and then wakes up to continue running. If you modify the program to use timer sleep or deep sleep (the two commented lines), the device will restart the entire program after waking up.

API

The Tough Wakeup functionality uses the Power_Class from the M5Unified library. For more related APIs, please refer to the following documentation:

• M5Unified - Power Class