I migrated the public ST driver to use the HE nomenclature, there are some raw zigbee commands in there that had to be changed from "st.... " to "he....."
You can find that driver here:
I have to say, I am not overly impressed with the device. The temperature is always the same as the environment and the humidity readings don't seem to be to accurate, as in: Put in in a glass full of water and get 68% humidity.....