void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
Serial.println("Hello,WORLD!");
// Setup GPIO for output
pinMode(23, OUTPUT); // Red LED
pinMode(22, OUTPUT); // Yellow LED
pinMode(21, OUTPUT); // Blue LED
}
void loop() {
// put your main code here, to run repeatedly:
delay (250); // Wait but do nothing special
Serial.println(" I am ESP32!");
digitalWrite(23, HIGH);
digitalWrite(22, LOW);
digitalWrite(21, HIGH);
delay (250) ; // wait but do nothing special
digitalWrite(23, LOW);
digitalWrite(22, HIGH);
digitalWrite(21, LOW);
}