Edit: I have been playing with adding a Hubitat / SmartThings driver to Tasmota (which is totally separate code from this project). My github fork for that is here: GitHub - erocm123/Sonoff-Tasmota at master. Firmware is here: https://github.com/erocm123/Sonoff-Tasmota/raw/master/sonoff/sonoff.ino.generic.bin. Drivers will be posted in my Hubitat repository (with Tasmota in the name) Hubitat/Drivers at master · erocm123/Hubitat · GitHub.
After some progress, I will probably open a new thread). New thread is here: [Release] Tasmota Sonoff Hubitat Driver & Device Support
I've been working on porting my Sonoff Connect over to Hubitat in my spare time. I have the discovery app working, firmware updated, and the driver for the Sonoff Basic done. The drivers are taking a little extra work as I've had to use some alternate LAN communication methods to get Basic Authentication working. That is for those that want to password protect their Sonoff devices.
There is a wealth of knowledge on the SmartThings forums. Probably a little too much knowledge and I haven't had time to keep up on it.
Note: If you are having problems getting the AP after flashing, please see this post: [RELEASE] Sonoff (Connect)
Here is the Connect app for Hubitat:
Here are the driver and firmware links. Source is here.
I'll work on the drivers that aren't finished yet, but if you take a look at what I had to do with the "Basic" driver, you can probably figure it out. If anyone does update them in the meantime, let me know!