This document summarizes different communication methods for building smart home monitoring systems. It reviews existing systems that use technologies like Bluetooth, GSM, Wi-Fi, DTMF, and voice commands. It also compares these technologies and their advantages and disadvantages. Specifically, it provides summaries of systems that use Bluetooth and GSM, mobile apps with IoT, Wi-Fi based internet monitoring, DTMF control via mobile phones, and compares popular technologies like Java, Bluetooth, phone lines, Zigbee, home gateways, and Wi-Fi. It concludes that internet modules provide the main advantage of remote control from anywhere while calling systems using DTMF allow control via mobile phone buttons.