IoT Home Automation: mini project with code, report and viva

The NodeMCU joins your Wi-Fi and serves its own control page, so there is no app to install and no cloud account. Open home.local on any phone, log in, and tap a switch: the relay clicks within a second.

Any channel can be given a switch-off timer, such as the fan for 30 minutes, and one button switches everything off. The states are saved in flash and come back after a power cut, and if the home Wi-Fi is down the board starts its own hotspot. A small JSON API lets other apps use it too.

The sketch was built and run on a PC with stand-ins for the ESP8266 libraries and a real web server, and tested with real HTTP requests and a browser (21 checks). The pack covers the relay wiring, the ESP8266 pins to avoid, HTTP and authentication, and safe 12 V wiring for the model.