Motion detection usually means PIR sensors, cameras, or microphones. ESPectre takes a very different approach: it detects movement by analyzing how the human body disturbs Wi-Fi radio waves. In this tutorial, I’ll walk through what ESPectre is, how it works, and how to set it up using an ESP32 and …

In this tutorial, I’ll show you exactly how I send sensor data from an ESP32 to Google Sheets every hour.

If you’re looking for a simple but powerful way to control AC or DC devices over Wi‑Fi, the ESP8266 relay board is one of the best places to start. I’ve used ESP8266‑based boards in many hobby and semi‑professional projects, and relay boards are usually the first real‑world application people build.

In this tutorial, I’m going to walk you through how I built my own voice assistant—similar to Alexa or Google Home—using only a Raspberry Pi 5, a USB microphone, a speaker, and an LLM with text-to-speech (TTS) and speech-to-text (STT) support. By the end of this guide, you’ll have a …

Living in Chicago means experiencing sweltering summers and unpredictable temperature swings. That’s why choosing Professional Air Conditioner Installation Services in Chicago is more than just a smart choice—it’s essential for long-term comfort, energy savings, and system reliability. In this comprehensive guide, we’ll walk through everything you need to know, from …

This guide shows how to interface the MH-ET LIVE Scanner V3.0 with Arduino using the UART serial interface. This scanner can read 1D barcodes and 2D codes including QR, and outputs the decoded text through UART or USB.

Ever wanted to make your ESP32 respond to voice commands like “ON”, “OFF”, or “LIGHT”? Thanks to TinyML, we can now run machine-learning models directly on microcontrollers — no cloud needed. In this tutorial, I’ll walk you through building a voice command recognition project using an ESP32, Edge Impulse, and …

Introduction Whenever I peel back the layers of how my Arduino boards actually work, I always end up revisiting one classic topic: CISC vs RISC. When I first heard those terms, I honestly thought they were meant for chip architects wearing lab coats inside semiconductor fabs. But the more I …

The crypto landscape in 2025 is a blend of soaring innovation and tightening rules. While most mainstream exchanges rely on strict “Know Your Customer” (KYC) policies, a significant part of the community still seeks ways to “buy crypto no KYC”—to preserve privacy, speed, and autonomy in a world where digital …

The WeMos D1 R32 is an ESP32-based development board that takes the familiar Arduino Uno form factor. It promises to give makers the power of the ESP32—Wi-Fi, Bluetooth, dual-core processing—while keeping the physical compatibility of an Arduino board. But as many users have discovered, the D1 R32 isn’t a drop-in …