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PlatformIO_ESP32_SimpleBlink/src/main.cpp

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#include <Arduino.h>
void setup() {
Serial.begin(9600);
while (!Serial) {
delay(100);
}
Serial.println("Starting");
pinMode(2,OUTPUT);
}
void loop() {
digitalWrite(2,HIGH);
Serial.println("ON");
sleep(1);
digitalWrite(2,LOW);
Serial.println("OFF");
sleep(1);
}