For anyone who wants to give my 'HaasTI Zigbee Parent' driver a try, here is my first ALPHA release.
This driver is for the board by itself. I did implement a custom command called 'sendCommand(String)' which allows you to send whatever string you'd like (up to 14 characters, I believe) if you want to mess around using the UART. It currently does not handle any responses that an attached microcontroller might reply with over the UART/Serial connection.
I have exposed most, if not all of the configuration parameters as user preferences. I also added linear conversions for each of the analog inputs to make those a little more 'engineering unit' friendly. The analog inputs all end up in Child Temperature devices for now, since there is no 'Generic Component Voltage Measurement' driver in Hubitat, yet. The 4 digital outputs are exposed as 4 Child Switch devices. The two digital inputs are exposed as a pair of child Contact Sensor devices, as well as by outputting Button Pushed events for Button 1 and Button 2.
Please provide feedback on your results and enjoy!