[Tkinter] Anyone know what happened to my button?

[Yoriz]

I am at a loss to know where to go from here, I understand that the current update method returns data that can be split by ',' to get the voltage, date and time.
The while True has no way of exiting so I guess it continues to give readings and the button is never re-enabled, does it need a sleep to pause it, how often does it update.
I don't understand how another sensor data is received, does it need a separate thread and another unique way of calling it to get its data.
If there was a way of detecting the separate sensors the GUI could be adjusted automatically.