char msg[80]; // array to store incoming characters
int idx = 0; // index into array
int ledPins[] = {15, 2, 4, 5};
int numLeds = 4;
int i = 0;
char ch;
void setup() {
// array of GPIO pins
Serial.begin(115200);
Serial.println("Program start ");
for (i=0; i < numLeds; i++) {
pinMode(ledPins[i], OUTPUT);
}
// Initialize each GPIO pin as an output and turn on the LED
for (i = 3; i >= 0; i--) {
digitalWrite(ledPins[i], LOW);
delay(500);
}
}
void loop() {
// No code needed in the loop for this example
// Check if data is available to read
if (Serial.available() > 0) {
ch = Serial.read();
if (ch=='1')
{
digitalWrite(ledPins[0], HIGH);
Serial.println("key 1 pressed");
}
if (ch=='2')
{
digitalWrite(ledPins[1], HIGH);
Serial.println("key 2 pressed");
}
if (ch=='3')
{
digitalWrite(ledPins[2], HIGH);
Serial.println("key 3 pressed");
}
if (ch=='4')
{
digitalWrite(ledPins[3], HIGH);
Serial.println("key 4 pressed");
}
if (ch=='5')
{
for (i = 3; i >= 0; i--) {
digitalWrite(ledPins[i], LOW);
delay(500);
}
}
if (ch=='6')
{
for (i = 3; i >= 0; i--) {
digitalWrite(ledPins[i], HIGH);
delay(500);
}
}
}
}