After we made a doorbell to Push message device using an Arduino with Ethernet card we decided to make a complete Push message service that you can use to implement messaging within minutes in your thing!
We had this project to bridge the front door bell to a push message on the phone but couldn't find an easy way to send the message to a service like WhatsApp or any other Push aware application.
We ended up writing a complete push message service so that your things can send push messages with no effort. And best of all, we offer the service for free!