A data diode is a unidirectional network device that allows data to travel in only one direction, commonly used in high-security environments like defense, nuclear power plants, and industrial control systems to protect against cyberattacks. Originally developed by governments in the 1980s–1990s as an alternative to air gaps, data diodes have evolved into hardware-software combinations capable of handling multiple protocols simultaneously. They are now widely deployed across sectors including utilities, oil and gas, aviation, and manufacturing, with regulations in the US and Europe increasingly mandating their use for safety-critical systems.
A Home Assistant-based home security system featuring RFID entry, keypad access, presence tracking, and networked alarm notifications. The author documents security limitations including Wi-Fi dependency, potential card cloning, and offline vulnerabilities, providing open-source configuration and firmware with explicit warnings about reliability gaps.
A detailed guide to reverse engineering an MCZ MUSA 2.0 AIR pellet stove remote using an ESP32C6 microcontroller, CC1101 transceiver, and ESPHome firmware. The author recorded the original remote's signals, built a replacement remote with touchscreen controls, and integrated it with Home Assistant for convenient stove management from anywhere in the home.
The ESP8266 and ESP32 microcontrollers offer built-in Wi-Fi and Bluetooth connectivity at lower cost than Arduino, making them ideal for IoT applications. While they provide superior performance and features, they consume more power, operate at 3.3V logic levels requiring level shifters, and have a steeper learning curve than Arduino.