Built In aka System driver. One that comes preinstalled on the hub. Same thing as I asked above, the name of the driver listed in the "Type" box on the device info page.
Even better might be to look on the device list, it shows you right there if it is a user driver or system. Example below, top one is system driver bottom is user/custom
The post I quoted above is the thread for my custom Zooz switch/dimmer driver, here is the top post: [DRIVER] Zooz ZEN Switches Advanced (and Dimmers)
