A DIY project that monitors the temperatures of the water in my home's heating system and the exterior temperature using a NodeMCU microcontroller and DS18B20 temperature sensors.
Great software begins with a set of timeless principles, not clever tricks. This article lays out the core concepts—SOLID, DRY, KISS, separation of concerns, consistency models, immutability, idempotency, and testing approaches—that make code robust, maintainable, and easy to evolve.