Hello,

I've had a fantastically functioning ISY for a long time (more than 10 years!)  and have not really looked at it in years (very, very solid). I even have my original PLM.

If I were to upgrade to the eISY, aside from the device itself, do I need anything else? Does the eISY require a PLM? Does the eISY require any subscriptions other than the option ISY network for remote access?

Any help would be greatly appreciated. 

Cheers!

Yes, you'll need a PLM. You can move your existing PLM over, but if it's a serial PLM you'll need UDI's special serial > usb cable.

Sometimes these migrations require you to spend a lot of time re-establishing Insteon. Since your PLM is that old, it comes from a time before they made production changes... maybe get a new PLM now and switch over and get it over with during your upgrade. We can talk about the steps later if you choose to go this way

One more thought... Insteon is releasing a new version of the PLM, they say this summer. If it was me, and my system was working ok... I'd wait till later this year and upgrade to a new eisy, new re-engineered PLM... go through the upgrade headaches all at once... and let it sit another 10 year.

One other fact.

There is going to be an eisy price increase in early May.

https://www.universal-devices.com/price-increase/