This is an IoT Project that sends PIR sensor alarm to an Android phone using Temboo, Parse.com service and an Arduino Ethernet board including W5500.
See the diagram of the whole system.
How the PIR Alarm system works :
PIR sensor detects the motion around it -> Send the data to Temboo service through an Arduino board using W5500 -> Temboo service calls Parse.com service to leave an alarm on the Android phone.
Following picture shows the real msg received from Parse.com
Original page contains further and detailed information of how to send an alarm from Temboo and Parse.com to an Android phone and also about an Arduino.
Check all of explanation and source with following link to the original web-page.
Next link is about how to communicate between Parse.com and an Android phone.