[UPDATE] - Logitech changed the webSockets interface slightly in v4.15.250 of the Harmony Hub firmware. @corerootedxb was able to come up with a fix to the driver to make it work with the new 4.15.250 firmware. This issue only affects new instances of the Logitech Harmony Hub virtual device. Existing users are not impacted. v0.1.20190220 of this driver is designed to work specifically with Harmony Hub v4.15.250. Existing user may upgrade as well, as long as their harmony hubs are also at 4.15.250. Thank you @corerootedxb for the quick solution!
I am pleased to announce a Release of my new Logitech Harmony Hub Driver. This driver communicates directly to your Harmony Hub over your LAN. It will create a child switch device for each of your Harmony Activities, and will keep them all up to date with instant status updates from the Harmony Hub. No polling required!
This integration requires new LAN connectivity features only available in the recent Hubitat Elevation Firmware version 2.0.3. and newer
The instructions for using this driver are available in my GitHub repository within the ReadMe for this driver. This is a very early release. I expect users will want enhancements. I encourage GitHub Pull Requests as I welcome community support of this integration!