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Add RGB LED demo example for Arduino Giga R1 WiFi
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‎hardware/arduino/mbed/variants/GIGA/Examples/GigaWiFi_RGB_LED_Demo/GigaWiFi_RGB_LED_Demo/GigaWiFi_RGB_LED_Demo.ino

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/*
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Arduino Giga WiFi – RGB LED Demonstration
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This sketch showcases how to control the built-in RGB LED on the Arduino Giga R1 WiFi board.
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It demonstrates basic color mixing by setting the Red, Green, and Blue channels independently, allowing you to experiment with various color outputs.
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Designed specifically for the Giga R1 WiFi, this example helps new users understand how to interface with onboard components without needing any external wiring.
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Board Compatibility:
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* Arduino Giga R1 WiFi (only) connected via USB-C.
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Features Demonstrated:
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* Direct control of RGB LED pins
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* Simple timing with delay()
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* Sequential color transitions
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Available Commands (case-sensitive):
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BLED - Switch ON the RED channel of the RGB LED.
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GLED - Switch ON the GREEN channel of the RGB LED.
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RLED - Switch ON the BLUE channel of the RGB LED.
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LEDoff - Switch OFF the LED.
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BlinkB - Blink the LED in the Blue color channel.
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BlinkG - Blink the LED in the Green color channel.
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BlinkR - Blink the LED in the Red color channel.
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Usage:
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1. Upload the sketch to your Arduino Giga R1 WiFi.
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2. Start the serial montior.
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3. Interact by typing in any of the previous 7 commands.
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Created: 09 April 2025
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Author: Ahmed Sharaf (Tech Forge International LLC)
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License: MIT
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*/
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// Global variables and constants
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String inputCommand = ""; // Buffer to store incoming Serial data.
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const int commandDelay = 500; // Delay used for LED blinking in milliseconds (change according to your personal pereference).
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const int blinkCount = 5; // Number of times to blink the LED (change according to your personal pereference).
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// Function declarations
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void processCommand(String command);
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void TurnOn(int led, String ledName);
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void BlinkLED(int led, String ledName);
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void TurnOffLED();
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void setup() {
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// Initialize Serial communication at 115200 baud.
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Serial.begin(115200);
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// Wait for the serial port to connect (for native USB boards).
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while (!Serial) {
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; // Do nothing until Serial is ready.
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}
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// Configure LED pins as outputs.
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pinMode(LEDB, OUTPUT);
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pinMode(LEDG, OUTPUT);
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pinMode(LEDR, OUTPUT);
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// Turn off all LEDs at startup.
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TurnOffLED();
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// Display welcome message and available commands.
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Serial.println("=========================================================");
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Serial.println(" Arduino Giga WiFi | RGB LED Control");
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Serial.println("=========================================================");
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Serial.println("Enter one of the following 7 commands (case-sensitive):");
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Serial.println("---------------------------------------------------------");
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Serial.println(" RLED : Switch ON the RED channel of the RGB LED.");
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Serial.println(" GLED : Switch ON the GREEN channel of the RGB LED.");
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Serial.println(" BLED : Switch ON the BLUE channel of the RGB LED.");
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Serial.println(" LEDoff : Switch OFF the RGB LED.");
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Serial.println(" BlinkR : Blink the LED in the RED color channel.");
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Serial.println(" BlinkG : Blink the LED in the GREEN color channel.");
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Serial.println(" BlinkB : Blink the LED in the BLUE color channel.");
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Serial.println("---------------------------------------------------------");
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}
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void loop() {
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// Read incoming serial data character-by-character.
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while (Serial.available()) {
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char c = Serial.read();
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// Append characters to command buffer; ignore newline and comma delimiters.
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if (c != '\n' && c != ',') {
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inputCommand += c;
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}
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delay(2); // Short delay to ensure complete data reception.
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}
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// If a command was received, process it.
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if (inputCommand.length() > 0) {
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inputCommand.trim(); // Remove any leading/trailing whitespace.
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processCommand(inputCommand);
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inputCommand = ""; // Clear the command buffer.
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Serial.flush(); // Clear any leftover data in the Serial buffer.
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}
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}
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// Processes the received command and triggers the corresponding action.
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void processCommand(String command) {
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// Debug print for testing purposes
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Serial.print("Received command: ");
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Serial.println(command);
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if (command == "BLED") {
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TurnOn(LEDB, "Blue");
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} else if (command == "GLED") {
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TurnOn(LEDG, "Green");
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} else if (command == "RLED") {
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TurnOn(LEDR, "Red");
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} else if (command == "LEDoff") {
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TurnOffLED();
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Serial.println("Turned off all LEDs.");
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} else if (command == "BlinkB") {
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BlinkLED(LEDB, "Blue");
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} else if (command == "BlinkG") {
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BlinkLED(LEDG, "Green");
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} else if (command == "BlinkR") {
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BlinkLED(LEDR, "Red");
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} else {
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Serial.println("Unrecognized command. Please try again using one of the 7 commands avaialble.");
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}
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}
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// Activates the selected color channel of the RGB LED; assumes active LOW.
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void TurnOn(int led, String ledName) {
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// Ensure the LED is off before switching to the selected color.
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TurnOffLED();
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digitalWrite(led, LOW); // Activate the specified color channel.
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Serial.println("Turned on the " + ledName + " LED.");
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}
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// Blinks the specified color channel of the RGB LED a given number of times.
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void BlinkLED(int led, String colorName) {
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// Ensure all LEDs are off before blinking.
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TurnOffLED();
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Serial.println("Blinking the LED in " + colorName + " " + String(blinkCount) + " times.");
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for (int i = 0; i < blinkCount; i++) {
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digitalWrite(led, LOW); // Turn LED ON with the specified color.
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delay(commandDelay);
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digitalWrite(led, HIGH); // Turn LED OFF.
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delay(commandDelay);
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}
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}
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// Turns off all color channels of the integrated RGB LED; assumes active LOW.
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void TurnOffLED() {
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digitalWrite(LEDB, HIGH);
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digitalWrite(LEDG, HIGH);
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digitalWrite(LEDR, HIGH);
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delay(2); // Short delay to ensure state change is registered.
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}

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