In your DTH I see several custom attributes, if you want to display their value, you’ll need to add a custom capability for each one of them.
Once you’ve defined all the capabilities for the device, you need to generate its presentation to indicate each view configuration. (I can help you through this process too)
In your SmartApp I found that you use the generateEvent function to send the values to the device, but in your DTH, there’s no such function.
sendEvent is the one that actually sends the new value to the capability attribute, for example:
sendEvent(name: "temperature", value: "50", unit:"F")
Take a look at this SmartApp with a similar functionality.