ESP8266 Community Forum

- Fri Dec 26, 2014 10:39 am #5743

... and here is how you could do it in C code:

Theory is nice, code is better

- Fri Dec 26, 2014 6:29 pm #5764 The blue LED on GPIO01 is inverted. When the output is high, so the LED is off and vice versa. But otherwise it works nicely.

- Mon Feb 02, 2015 4:35 pm #8801 is it also possible to drive the LEDs with LUA instead of C ??

- Sun Jun 21, 2015 9:00 am #21098 So here is the corresponding code for the Arduino IDE:

Code: Select all/* Blink the blue LED on the ESP-01 module
 Based on Blink without Delay. This example code is in the public domain
 http://www.arduino.cc/en/Tutorial/BlinkWithoutDelay
 */

const int ledPin =  1;  // The blue LED on the ESP-01 module is connected to GPIO1
                        // (which is also the TXD pin; so we cannot user Serial at the same time

int ledState = LOW;     

unsigned long previousMillis = 0;
const long interval = 1000;

void setup() {
  pinMode(ledPin, OUTPUT);
}

void loop()
{
  unsigned long currentMillis = millis();
  if(currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;   
    if (ledState == LOW)
      ledState = HIGH;
    else
      ledState = LOW;
    digitalWrite(ledPin, ledState);
  }
}