In our previous tutorials on IoT, we covered how to setup a Raspberry Pi and how to connect it to Parse Server using Back4App API to save objects to the server and to perform Queries and Live Queries.
Now we cover how to reproduce everything done on the Raspberry side to the App side. In this tutorial, we describe an Android App to interact with the IoT device configured earlier. From the Parse Server side, the App does the same tasks as the Raspberry: writes objects and performs Queries and Live Queries. Please note these functionalities may be useful even if you do not plan to develop an IoT application!