Sharing my recent experience with controlling the boat hoist control box from Gem Remotes with my Hubitat system.
The challenge: Gem Remotes makes an awesome control box for operating the motors on a boat hoist. Their control box includes the ability to be operated via a remote fob. The problem is that the range on the fob is somewhat limited. When I have my boat out of the hoist I prefer to keep the lift in the up position so that everything is out of the water. When I return I use the remote to lower the hoist back down so that the boat can go back on it. The hoist can take some time to go from the fully up position to the fully down position, and the limited range on the fob creates the scenario where I have to wait a while until the hoist is low enough to navigate the boat over top of it. Ya I know, first world problems. 
Gem Remotes has been working on a new control board that is WiFi enabled. I've been waiting on it for nearly 4 years now. Still no idea when it will be available. I got into Hubitat a few months back when AT&T Digital Life announced that it's going away. All of my smart devices (locks, lights, outlets, sensors, thermostats, etc.) that I used to have with Digital Life have now all been converted to Habitat and I've been very pleased with the system. So my thinking was to figure out a way to control the Gem Remotes device with Hubitat.
I contacted Gem Remotes tech support (they are always awesome, by the way) and they let me know that if you short pin 1 to pin 3 on their control board then that will trigger the hoist to go up. And if you short pin 1 to pin 4 then that will trigger the hoist to go down. Gem even sells a cable that can be inserted in-line that has the leads that are needed to do this which are spliced out in a pigtail. That part number, by the way, is K-6PIN. So I ordered that from Gem.
For the z-wave portion of this I purchased a FortrezZ MIMO2+. I simply set up the Relay 1 to close for half a second to trigger the hoist to go up, and Relay 2 was set up to close for half a second to trigger the hoist to go down.
So now I can use my iPhone to trigger the hoist to go down when I am a few miles from my house instead of having to wait to do it when I'm about 100 yards away. And the hoist will be in the fully down position when I arrive. Love it!
The only thing that I would like to be able to do with this solution is to have the ability to place an "Are you Sure? Yes or No" dialog box pop up on my dashboard button so that the hoist isn't lowered by accident via an inadvertent press of the button.
