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Use BUILTIN_LED

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probonopd 2015-06-21 21:25:53 +02:00 committed by Ivan Grokhotkov
parent 3e87bb3ce2
commit 2969b0b7a3
1 changed files with 12 additions and 11 deletions
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23
libraries/esp8266/examples/Blink/Blink.ino
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@ -2,22 +2,23 @@
ESP8266 Blink by Simon Peter ESP8266 Blink by Simon Peter
Blink the blue LED on the ESP-01 module Blink the blue LED on the ESP-01 module
This example code is in the public domain This example code is in the public domain
The blue LED on the ESP-01 module is connected to GPIO1
(which is also the TXD pin; so we cannot use Serial.print() at the same time)
Note that this sketch uses BUILTIN_LED to find the pin with the internal LED
*/ */
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 use
// Serial.print() at the same time
void setup() { void setup() {
pinMode(ledPin, OUTPUT); // Initialize the ledPin as an output pinMode(BUILTIN_LED, OUTPUT); // Initialize the BUILTIN_LED pin as an output
} }
// the loop function runs over and over again forever // the loop function runs over and over again forever
void loop() { void loop() {
digitalWrite(ledPin, LOW); // turn the LED on (Note that LOW is the voltage level digitalWrite(BUILTIN_LED, LOW); // Turn the LED on (Note that LOW is the voltage level
// but actually the LED is on; this is because // but actually the LED is on; this is because
// it is acive low on the ESP-01) // it is acive low on the ESP-01)
delay(1000); // Wait for a second delay(1000); // Wait for a second
digitalWrite(ledPin, HIGH); // Turn the LED off by making the voltage HIGH digitalWrite(BUILTIN_LED, HIGH); // Turn the LED off by making the voltage HIGH
delay(2000); // Wait for two seconds (to demonstrate the active low LED) delay(2000); // Wait for two seconds (to demonstrate the active low LED)
} }