diff --git a/examples/Advanced/Lora/LoRaSender/LoRaSender.ino b/examples/Advanced/Lora/LoRaSender/LoRaSender.ino
index f09c7ee..4bae1a0 100644
--- a/examples/Advanced/Lora/LoRaSender/LoRaSender.ino
+++ b/examples/Advanced/Lora/LoRaSender/LoRaSender.ino
@@ -41,5 +41,5 @@ void loop() {
 
   counter++;
 
-  delay(50);
+  delay(1000);
 }
\ No newline at end of file
diff --git a/examples/Basics/Hello/Hello.ino b/examples/Basics/Hello/Hello.ino
index a71a586..a2e6b48 100644
--- a/examples/Basics/Hello/Hello.ino
+++ b/examples/Basics/Hello/Hello.ino
@@ -13,4 +13,7 @@ void setup(){
 // the loop routine runs over and over again forever
 void loop() {
 
+  if(digitalRead(39) == 0) {
+    M5.powerOFF();
+  }
 }
diff --git a/examples/Basics/PowerOFF/PowerOFF.ino b/examples/Basics/PowerOFF/PowerOFF.ino
new file mode 100644
index 0000000..96075a2
--- /dev/null
+++ b/examples/Basics/PowerOFF/PowerOFF.ino
@@ -0,0 +1,26 @@
+#include <M5Stack.h>
+
+// the setup routine runs once when M5Stack starts up
+void setup(){
+
+  // initialize the M5Stack object
+  M5.begin();
+
+  // Lcd display
+  M5.Lcd.println("This is software power off demo");
+  M5.Lcd.println("Press the button A to power off.");
+  
+  // Set the wakeup button
+  M5.setWakeupButton(BUTTON_A_PIN);
+}
+
+// the loop routine runs over and over again forever
+void loop() {
+
+  if(M5.BtnA.wasPressed()) {
+
+    M5.powerOFF();
+  }
+
+  M5.update();
+}
diff --git a/src/M5Stack.cpp b/src/M5Stack.cpp
index 4ff4bd5..c96d11c 100644
--- a/src/M5Stack.cpp
+++ b/src/M5Stack.cpp
@@ -8,7 +8,11 @@ void M5Stack::begin() {
     // UART 
     Serial.begin(115200);
     Serial.flush();
-    Serial.println("M5Stack init...");
+    Serial.print("M5Stack initializing...");
+
+    // I2C
+    pinMode(SCL, OUTPUT);
+    digitalWrite(SDA, 1);
 
     // TONE
     Speaker.begin();
@@ -28,6 +32,11 @@ void M5Stack::begin() {
     Lcd.setTextColor(WHITE);
     Lcd.setTextSize(1);
     Lcd.setBrightness(50);
+
+    // Set wakeup button
+    setWakeupButton(BUTTON_A_PIN);
+
+    Serial.println("OK.");
 }
 
 void M5Stack::update() {
@@ -72,4 +81,26 @@ void M5Stack::startupLogo() {
     }
 }
 
+void M5Stack::setWakeupButton(uint8_t button) {
+    _wakeupPin = button;
+}
+
+void M5Stack::powerOFF() {
+    
+    // power off the Lcd
+    Lcd.setBrightness(0);
+    Lcd.sleep();
+
+    // ESP32 into deep sleep
+    uint64_t _wakeupPin_mask = 1ULL << _wakeupPin;
+    USE_SERIAL.printf("Enabling EXT1 wakeup on pins GPIO%d\n", _wakeupPin);
+    esp_sleep_enable_ext1_wakeup(_wakeupPin_mask , ESP_EXT1_WAKEUP_ALL_LOW);
+    while(digitalRead(_wakeupPin) == LOW) {
+        delay(10);
+    }
+    USE_SERIAL.println("On deep sleep mode.");
+    esp_deep_sleep_start();
+    USE_SERIAL.println("On power OFF fail!");
+}
+
 M5Stack m5stack;
diff --git a/src/M5Stack.h b/src/M5Stack.h
index ff20a22..399012c 100644
--- a/src/M5Stack.h
+++ b/src/M5Stack.h
@@ -94,6 +94,7 @@ extern "C" {
 #include "esp32-hal-dac.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
+#include "esp_sleep.h"
 }
 
 class M5Stack {
@@ -104,6 +105,9 @@ class M5Stack {
     void update();
     void startupLogo();
 
+    void setWakeupButton(uint8_t button);
+    void powerOFF();
+
     // Button API
     #define DEBOUNCE_MS 20
     Button BtnA = Button(BUTTON_A_PIN, true, DEBOUNCE_MS);
@@ -122,6 +126,7 @@ class M5Stack {
 
  private:
 
+    uint8_t _wakeupPin;
 };
 
 extern M5Stack m5stack;
diff --git a/src/utility/Display.cpp b/src/utility/Display.cpp
index 60e7d19..547f560 100644
--- a/src/utility/Display.cpp
+++ b/src/utility/Display.cpp
@@ -3076,6 +3076,11 @@ void ILI9341::setBrightness(uint8_t brightness)
   ledcWrite(2, brightness);
 }
 
+void ILI9341::sleep() {
+  spi_begin();
+  writecommand(ILI9341_SLPIN); // Software reset
+  spi_end();
+}
 /***************************************************
   This library is written to be compatible with Adafruit's ILI9341
   library and automatically detects the display type on ESP_WROVER_KITs
@@ -3212,16 +3217,7 @@ static uint32_t jpgWrite(JDEC *decoder, void *bitmap, JRECT *rect)
     line = w - (oL + oR);
     while (line--)
     {
-      // 012
-      // 021
-      // 102
-      // 120
-      // 210
-      // 201
-
       pixBuf[pixIndex++] = jpgColor(data);
-// #define jpgColorx(c) (((uint16_t)(((uint8_t *)(c))[0] & 0xF8) << 8) | ((uint16_t)(((uint8_t *)(c))[2] & 0xFC) << 3) | ((((uint8_t *)(c))[1] & 0xF8) >> 3))
-      // pixBuf[pixIndex++] = jpgColorx(data);
       data += 3;
       if (pixIndex == 32)
       {
diff --git a/src/utility/Display.h b/src/utility/Display.h
index e64109b..e662f54 100644
--- a/src/utility/Display.h
+++ b/src/utility/Display.h
@@ -582,6 +582,7 @@ public:
            textWidth(const String& string),
            fontHeight(int16_t font);
 //---
+      void sleep();
       void setBrightness(uint8_t brightness);
       void progressBar(int x, int y, int w, int h, uint8_t val);
       void setAddrWindow(int32_t xs, int32_t ys, int32_t xe, int32_t ye);