This tutorial walks you through a tiny, privacy-first web app that reads only the advertised CO2 level from a nearby HibouAir sensor using a BleuIO USB BLE dongle. Renders it as a color bar with a simple “High CO2” warning when your threshold is crossed.

Create a secure Arduino RFID Door Lock using Visual Programming in Visuino! Learn how to connect the MFRC522 RFID module, verify card IDs, and control a magnetic solenoid lock. When a valid RFID card is detected, the door unlocks and a green LED confirms access. Swipe again to lock the door. No coding needed — perfect for beginners and smart home security projects.

This project fuses the Raspberry Pi's camera feed with a thermal graphic overlay.

Real-Time BLE Air Quality Monitoring with BleuIO and Adafruit IO

This guide will help you create a fun little indoor barometer to help you predict changes in the weather without writing a single line of code.

Learn how to use Hall effect sensors to accurately calculate an object’s position using magnets! I walk through my design process, what I learned, and how I am applying this technology to high-power liquid rocketry. Includes breadboard prototyping, PCB design, firmware and algorithm development, and sensor characterization.

How to use visual programming for arduino