This document summarizes several existing smart home monitoring systems that use different communication methods. It describes systems that use Bluetooth and GSM, systems connected through the internet of things using an Arduino board and mobile phone, and systems that monitor temperature, motion, and lights using sensors connected to a server through Wi-Fi. The document also provides a table that compares the advantages and disadvantages of popular home automation technologies like systems based on Java, Bluetooth, telephone lines, Zigbee, home gateways, and Wi-Fi.