BlinkESP8266.ino

/*
 ESP8266 Blink by Andrew Stuntz
 The LED is connected to GPIO pin 5 in this case. 

 Written for the ESP8266 ESP-07 version of this board. 
*/

void setup() {
  pinMode(5, OUTPUT);  // Initialize the LED_BUILTIN pin as an output
  Serial.begin(115200); 
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(5, LOW);   // Turn the LED on (Note that LOW is the voltage level
                                    // but actually the LED is on; this is because 
                                    // it is acive low on the ESP-01)
  delay(1000);                      // Wait for a second
  Serial.print("High");
  Serial.println();
  digitalWrite(5, HIGH);  // Turn the LED off by making the voltage HIGH
  delay(2000);                      // Wait for two seconds (to demonstrate the active low LED)
}