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💡 ESP8266 Push Button LED Control using Polling Method (MicroPython)

This project demonstrates how to control an LED using a push button on the ESP8266 microcontroller through the polling method.
The code continuously checks the button’s state in a loop and turns the LED ON or OFF accordingly.

🧠 Project Overview

Component Description
Board ESP8266
IDE Thonny IDE
Language MicroPython
USB Driver Silicon Labs CP210x USB to UART Bridge
LED Pin GPIO2
Button Pin GPIO0

⚙️ Requirements

  • ESP8266 board (NodeMCU or compatible)
  • 1 LED + 220Ω resistor
  • 1 Push Button
  • Micro USB cable
  • Thonny IDE
  • CP210x USB Driver
  • MicroPython firmware flashed on ESP8266

🧩 Circuit Connections

ESP8266 Pin Component Description
GPIO2 LED Output (Active LOW)
GPIO0 Push Button Input (Active LOW)
GND LED (-) and Button GND Common Ground

💡 Tip: Use an internal or external pull-up resistor on GPIO0 to prevent floating input values.

💻 Code

import machine

# GPIO2 = one LED connected
# GPIO0 = pushbutton

led = machine.Pin(2, machine.Pin.OUT)
button = machine.Pin(0, machine.Pin.IN)

def button_function():
    if button.value() == 0:   # Button pressed
        led.value(0)          # Turn LED ON
    else:                     # Button released
        led.value(1)          # Turn LED OFF

while True:
    button_function()         # Polling method