This beginner guide explains how to wire a pushbutton to an ESP32 and use it to control an LED. You’ll learn what digitalRead() returns, why pinMode() matters, and how to avoid the most common beginner issue: a floating input (random…
This beginner guide explains the famous Blink sketch line-by-line on an ESP32/Arduino board. You’ll learn what setup() and loop() do, how pinMode() works, what HIGH/LOW really mean, and why delay(1000) makes the LED blink once per second (plus fixes if…
The ESP-01 (and ESP-01S) is the smallest, most annoying, and most misunderstood ESP8266 module. It can be incredibly useful (Wi-Fi bridge, tiny sensor node, UART→Wi-Fi device), but only if you wire it correctly and respect its boot pins. This guide…
The ESP8266 is the chip that kicked off the Wi-Fi microcontroller revolution. Even today it’s still a great choice for simple IoT devices: cheap, small, and supported everywhere. But it has quirks (boot pins, one ADC input, weak power rails…
The ESP32-DevKitC V4 is the “classic ESP32” dev board most tutorials assume. But the internet is full of half-truths: pinout posters without context, ADC guides ignoring Wi-Fi conflicts, and “use GPIO0” recipes that break boot. This guide is meant to…
This guide focuses on pinout and GPIO selection for the DevKitC-1, so you can safely connect sensors, relays, USB, displays etc. without running into weird boot issues. The ESP32-S3-DevKitC-1 is Espressif’s entry-level development board for the ESP32-S3-WROOM-1 / 1U /…
The ESP32-S2-DevKitC-1 is Espressif’s entry-level development board for the ESP32-S2 – a single-core Wi-Fi microcontroller with native USB, 43 GPIOs, ADC, DAC, touch, and a rich set of peripherals. This guide focuses on pinout and GPIO selection for the DevKitC-1,…
Everything you need, zero assumptions, no missing steps This guide gets you from new board → first working program in the simplest and shortest way possible. 1. What You Need Use these items: No breadboard or extra parts needed for…