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33 lines
905 B
33 lines
905 B
/*
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ESP8266 BlinkWithoutDelay by Simon Peter
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Blink the blue LED on the ESP-01 module
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Based on the Arduino Blink without Delay example
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This example code is in the public domain
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The blue LED on the ESP-01 module is connected to GPIO1
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(which is also the TXD pin; so we cannot use Serial.print() at the same time)
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Note that this sketch uses LED_BUILTIN to find the pin with the internal LED
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*/
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int ledState = LOW;
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unsigned long previousMillis = 0;
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const long interval = 1000;
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void setup() {
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pinMode(LED_BUILTIN, OUTPUT);
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}
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void loop() {
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unsigned long currentMillis = millis();
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if (currentMillis - previousMillis >= interval) {
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previousMillis = currentMillis;
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if (ledState == LOW) {
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ledState = HIGH; // Note that this switches the LED *off*
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} else {
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ledState = LOW; // Note that this switches the LED *on*
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}
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digitalWrite(LED_BUILTIN, ledState);
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}
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}
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