added example sketch documentation

Author: cristidragomir97

examples/Charger/Charger.ino

@@ -23,7 +23,13 @@
     - Open the Serial Monitor in the Arduino IDE.
     - Set the baud rate to 115200.
     - You will see the sketch continuously printing charger state information.
+
+
+    Please note that the Portenta C33 will not charge bateries that do not have an NTC. 
+
+    Original author: C. Dragomir (http://arduino.cc)
 */
+
 #include "Arduino_PowerManagement.h"
 
 Charger charger;

examples/Standby_WakeFromPin/Standby_WakeFromPin.ino

@@ -1,3 +1,28 @@
+/*
+    Standby Wake From Pin Demo
+
+    This sketch demonstrates how you can use the Arduino_PowermManagement library to send a board to standby mode by using a GPIO pin and wake it up from another. 
+    This sketch is universal and worksn on both Portenta C33 and H7. 
+
+    On the the Portenta C33 you can select any of the supported pins (A0, A1, A2, A3, A4, A5, D4, D7) to wake up the board from standby mode, 
+    but on the Portenta H7 only GPIO0 can be used to wake up the board from standby mode. GPIO0 is available trough the High Density Connectors and you need a breakout board to access it. 
+
+    Requirements:
+        - Arduino Portenta C33, Arduino Portenta H7
+        - Arduino IDE / Arduino CLI
+        - PowerManagement library (installable from the Arduino Library Manager)
+
+    Usage:
+        - Connect a button to GOTO_SLEEP_PIN and with a pull-up resistor to 3.3V
+        - Connect a button to pin PORTENTA_C33_WAKEUP_PIN if you are using the Portenta C33 or GPIO0 if you are using a Portenta H7  and with a pull-up resistor to 3.3V 
+            (If you need information about how to wire the buttons check this link: https://docs.arduino.cc/built-in-examples/digital/Button/)
+        - Upload the provided sketch to the board
+        - Press the button connected to GOTO_SLEEP_PIN to put the board into standby mode
+        - Press the button connected to PORTENTA_C33_WAKEUP_PIN or GPIO0 to wake up the board from standby mode
+        - The LED will blink every second to show that the board is awake when not in standby mode
+        
+    Original author: C. Dragomir (http://arduino.cc)
+*/
 
 #include "Arduino.h"
 #include "Arduino_PowerManagement.h"
@@ -13,7 +38,7 @@ Board board;
 void setup() {
     board = Board();
     board.begin();
-    board.setAllPeripheralsPower(true);
+    board.setAllPeripheralsPower(true); // TODO: Check if this is necessary
 
     // Allows to use a button to put the device into sleep mode
     attachInterrupt(digitalPinToInterrupt(GOTO_SLEEP_PIN), goToSleep, RISING);

examples/Standby_WakeFromRTC_C33/Standby_WakeFromRTC_C33.ino

@@ -1,3 +1,22 @@
+/*
+    Standby Wake from RTC Demo for Portenta C33 
+
+    This example demonstrates how to  wake up the Portenta C33 from standby mode using the included RTC (Real Time Clock).
+    The device will go to sleep for 1 second and then wake up. When the device is awake you will see the board's blue LED turned on. 
+    Effectivelly, you will get the same effect as with blink. 
+
+    On the Portenta C33 with the peripherals turned off you can expect around 60uA of current consumption in standby mode.
+    The example also turns off the peripherals before going to sleep and turns them back on after waking up.
+
+    Usage:
+        - Make sure you are running the latest version of the Renesas Core
+        - Select the Portenta C33 board from the Tools menu
+        - Select the Portenta C33 USB port from the Tools menu
+        - Upload the code to your Portenta C33
+
+    Original author: C. Dragomir (http://arduino.cc)
+*/
+
 
 #include "Arduino_PowerManagement.h"
 #include "RTC.h"
@@ -14,8 +33,6 @@ void blinkLed(int ledPin, int delayTime = 1000){
 }
 
 void setup() {
-
-
     pinMode(LEDR, OUTPUT); // Used to indicate errors
     digitalWrite(LEDR, HIGH); // Turn off the red LED
     pinMode(LED_BUILTIN, OUTPUT);
@@ -31,8 +48,8 @@ void setup() {
         }
     }
 
+
     board.setAllPeripheralsPower(true); // TODO: Check if this is necessary
-    
     digitalWrite(LEDB, LOW); // Turn on the blue LED to show that the board is still awake
 
     RTC.begin();
@@ -45,11 +62,11 @@ void setup() {
     }
 
     // board.enableWakeupFromRTC(0, 0, 10, [](){}); // Sleep for 10 seconds
-    board.enableWakeupFromRTC(0, 0, 10); // Sleep for 10 seconds
+    board.enableWakeupFromRTC(0, 0, 1); // Sleep for 10 seconds
 
     delay(1000); // Keep the board awake for 1 second, so we can se it working
 
-    board.setAllPeripheralsPower(false);
+    board.setAllPeripheralsPower(false); // turn off peripherals before going to sleep
     board.standByUntilWakeupEvent();
 }
 

examples/Standby_WakeFromRTC_H7/Standby_WakeFromRTC_H7.ino

@@ -1,35 +1,21 @@
 /*
-  Charger Demo
-
-  This sketch demonstrates how to use the PowerManagement library enable low power modes on the Arduino Portenta H7.
-  * In the setup() function, it enters standby mode and waits for a wakeup event from the RTC.
-  * The loop() functionit is not used in this sketch.
-  
-  IMPORTANT: Please note that this sketch has to be uploaded to the M4 core too in order to achieve the lowest power consumption.
-
-  Requirements:
-  - Arduino Arduino Portenta H7
-  - Arduino IDE
-  - PowerManagement library (installable from the Arduino Library Manager)
-
-  Usage:
-
-  1. Connect a battery to the board.    
-  
-  2. Upload the Sketch to the M4 core:
-    - Open the provided sketch in the Arduino IDE.
-    - Select your board type and port from the "Tools" menu.
-    - Select the M4 core from the "Tools" menu.
-    - Click the "Upload" button to upload the sketch to your board.
-
-  3. Upload the Sketch to the M7 core:
-    - Select the M7 core from the "Tools" menu.
-    - Click the "Upload" button to upload the sketch to your board.
-
-  4. Observer LED behavior:
-    - The blue LED will turn on when the board is awake.
-    - The blue LED will turn off when the board goes to sleep.
-    - The red LED will blink if the board fails to initialize.
+    Standby Wake from RTC Demo for Portenta H7 
+
+    This example demonstrates how to  wake up the Portenta H7 from standby mode using the included RTC (Real Time Clock).
+    The device will go to sleep for 10 second and then stay awake for another 10. When the device is awake you will see the board's blue LED turned on. 
+    Effectivelly, you will get the same effect as with blink. 
+
+    On the Portenta H7 with the peripherals turned off you can expect around 300uA of current consumption in standby mode.
+
+    The example also turns off the peripherals before going to sleep and turns them back on after waking up.
+
+    Usage:
+        - Make sure you are running the latest version of the Renesas Core
+        - Select the Portenta H7 board from the Tools men
+        - Select the Portenta H7 USB port from the Tools menu
+        - Upload the code to your Portenta H7
+
+    Original author: C. Dragomir (http://arduino.cc)
 */
 
 #include "Arduino_PowerManagement.h"
@@ -74,6 +60,7 @@ void setup() {
     fuelgauge.setOperationMode(FuelGaugeOperationMode::shutdown);
     delay(10000); // keep the board awake for 10 seconds, so we can se it working
 
+
     // The LED should go off when the board goes to sleep
     board.setAllPeripheralsPower(false);