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Teaches basic GPIO output usage with ESP32. We achieve a blinking effect by turning an LED on and off from a digital pin. ESP32 version of the classic blink project on Arduino UNO; the pin map and syntax remain the same, the only difference is in the pin numbers.
The LED lights up when the button is pressed and turns off when released. Shows how the ESP32's digital input pin and internal pull-up resistor are used. The INPUT_PULLUP mode eliminates the need for an external resistor.
Each time the button is pressed the state of the LED changes: if it is on it turns off, if it is off it turns on. Classic toggle pattern. With debounce we clean up the mechanical noise of the pushbutton to ensure a single toggle with a single press.
Blinking the built-in blue LED on the ESP32 DevKit V1. No external components required! The first project you should try when you buy an ESP32. GPIO 2 is connected to the built-in LED.
Real traffic light simulation with 3 LEDs red-yellow-green. Timings close to real traffic logic: red long, yellow short, green long. Classic example of sequential GPIO control.
Real-time monitoring of the light value measured by the LDR module in the Serial Monitor + approximate lux value. Teaches the module’s calibration logic. It is ideal to complete this before Project 10, as it is used to determine the threshold value.
