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…
The ESP8266 started life as a tiny Wi-Fi module but quickly became a full microcontroller platform. Under the metal cans, almost all modules use the same chip (ESP8266EX) – what changes is: This guide covers the most common variants you’ll…
When people say “ESP32 vs STM32”, they’re really comparing a Wi-Fi SoC (ESP32) with a huge family of general-purpose microcontrollers (STM32). They overlap, but they’re not aimed at the same sweet spot. If you’re starting a new embedded project today,…
Both ESP32-S2 and ESP32-S3 are “second-wave” ESP32 chips: they add native USB and more modern security features compared to the original ESP32. But they target slightly different use cases: If you’re deciding what to base a new board or project…
Espressif’s ESP32 family has exploded with variants, but for most makers and IoT projects the real question is simple: Should I use the classic ESP32, or the newer ESP32-S3? Both chips are dual-core Wi-Fi + Bluetooth SoCs, both are cheap,…
The ESP32-P4-EYE is one of Espressif’s newest dev kits: a tiny “camera-in-a-box” based on the ESP32-P4 SoC, with a built-in LCD, 2 MP camera, microphone, MicroSD and dual USB-C ports. It’s designed as a ready-made platform for AI vision and…
The ESP32-P4-Function-EV-Board v1.5.2 is Espressif’s flagship multimedia dev kit for the ESP32-P4: On top of that, the board carries an ESP32-C6-MINI-1 module that provides Wi-Fi 6 + Bluetooth LE connectivity. All ESP32-P4 GPIOs that Espressif exposes are routed to a…
(Safe Pins, ADC, I²C, SPI, USB, RGB LED) The ESP32-H2-DevKitM-1 is Espressif’s low-power Bluetooth LE + 802.15.4 (Zigbee/Thread/Matter) dev board based on the ESP32-H2-MINI-1/1U module. It’s basically an “ESP32 without Wi-Fi” but with full BLE + Zigbee/Matter support and 4…