This project report describes a mobile monitoring system for smart homes using an ARM7 microcontroller. The system uses a PIR sensor to detect unauthorized persons and trigger loads like lights and fans to turn on. It sends notifications to a mobile phone using GSM. The hardware requirements include an LPC2148 microcontroller, GSM module, relays, loads, LCD, and PIR sensor. The software used is Embedded C, Keil, and Proteus. Benefits are remote access, low power, and increased security and control of home systems. Potential applications include security systems, home automation, and access control.