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25 lines
927 B
25 lines
927 B
4 years ago
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/*
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ESP8266 Blink by Simon Peter
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Blink the blue LED on the ESP-01 module
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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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void setup() {
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pinMode(LED_BUILTIN, OUTPUT); // Initialize the LED_BUILTIN pin as an output
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}
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// the loop function runs over and over again forever
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void loop() {
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digitalWrite(LED_BUILTIN, LOW); // Turn the LED on (Note that LOW is the voltage level
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// but actually the LED is on; this is because
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// it is active low on the ESP-01)
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delay(1000); // Wait for a second
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digitalWrite(LED_BUILTIN, HIGH); // Turn the LED off by making the voltage HIGH
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delay(2000); // Wait for two seconds (to demonstrate the active low LED)
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}
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