Uploaded May 2019 | Updated September 2026, 2 weeks ago

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Ever wanted more GPIO on your ESP8266? This is one simple way to use your serial pins as GPIO. They can even be used for PWM and i2c!

Also check out Bornach's channel: youtube.com/channel/UC9yIAXcDmR2jjjAYopqwlmA

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Code:
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//GPIO 1 (TX) swap the pin to a GPIO.
pinMode(1, FUNCTION_3);
//GPIO 3 (RX) swap the pin to a GPIO.
pinMode(3, FUNCTION_3);

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