The main use of this handheld is to control the house-connected devices. We have developed a few programs to show how to do it. 

The first one is a WIFI config program.

At the top, it shows us the wifi SID and password used to connect, a dropdown menu, where the wifis available are (after a scan) and a textbox to introduce the password to the new wifi connection. 

The checkbox shows if we start the wifi connection at startup or if we will do it manually. If we use only the calculator software it is better to disable it, if we are going to control devices, we should check it.

If we press the Wifi On/Off button we connect / disconnect, save button stores our credentials. When the wifi is on a python timer shows a Wifi symbol in the head and hides it when we disconnect.

The second one is a panel control of my Philips Hue system. I have three light groups and it enables me to switch it on/off or control the brightness.

the other two are custom home projects, one is for food storage, CibusTabula.

and the other is for weight control