This document describes a system for substation monitoring and control using an IoT approach. Sensors are used to measure voltage, current, and temperature. An Arduino microcontroller collects data from the sensors and sends it over an IoT module to a remote computer. The system allows monitoring and control of substations in real-time from a remote location. Relays controlled by the microcontroller can automatically shut off power to parts of the substation if faults are detected. This provides improved safety and efficiency for substation management.