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!
Read all about the IoT to Push Message service on the mini site things.robota.nl.