Embedded Programming with Modern C++ Cookbook

How to do it...

We will implement a simple program for the Arduino controller that waits for user input on the serial port and turns the built-in LED on or off depending on the data:

1. Open Arduino IDE and select New in its File menu. A new Sketch window will show up.
2. Paste the following code snippet into the Sketch window:

void setup() { pinMode(LED_BUILTIN, OUTPUT); Serial.begin(9600); while (!Serial);}void loop() {  if (Serial.available() > 0) {      int inByte = Serial.read();      if (inByte == '1') {        Serial.print("Turn LED on\n");        digitalWrite(LED_BUILTIN, HIGH);      } else if (inByte == '0') {        Serial.print("Turn LED off\n");        digitalWrite(LED_BUILTIN, LOW);       } else {        Serial.print("Ignore byte ");        Serial.print(inByte);        Serial.print("\n");      } delay(500); ...