Long story short... I have a single Tapo Matter switch I needed to toggle. I've tried to get it to work on eISY and their matter stack, but could not get the share code to take it. After reading the forums others have similar issues. Its funny when I reset the switch, Google, Amazon try to grab ownership of the switch while I'm configuring it in the Tapo app. But UD Mobile would not make it stick, it would see the switch, yet time out when you click the complete button after around 15 seconds.

So I have a few hours open and AI coder at the ready.

This setup requires another machine running on your network. I could have used my NAS or my Linux box, I went with my Linux Rocky 9 box, I installed the MATTERJS-SERVER container using podman. It works like a champ. Its was pretty easy and if you go to the project in the /support directory there is a readme explaining how. https://github.com/awysocki/PMatter/

Then install PMATTER from the PG3 store - currently in the non-production store, I will move it over once I get some Ikea devices to test with and make sure they are working. But for now in beta.

All the devices the PMatter PG3 programs understands will be listed un PMATTER CONTROLLER in ISY

Most of my testing has just been to turn on and off lights. Not much else.

Enjoy

I'm in a similar situation. I have some Tapo (T-Link) switches, a brand new Linux Matter server and the Pmatter plugin. I couldn't get Matter to commission a new node with a Tapo switch, but I did get it to work with an existing node with this flow:

1. Create a node in Apple Home by scanning the QR code.

2. In the node attributes in Home, select "Turn On Pairing Mode" to get a share code.

3. In Matter, Commission Node-->Commission Existing Node, then enter share code.

4. The Pmatter set up is easy, just add the Matter server IP address in Configuration.

5. A Pmatter Controller node shows up in Admin Console and it has Discover and Query buttons which I a bit vague on. Anyway, I have two working Tapo switches.

I have the Tapo switches in a scene, which is controlled by a toggle program, which is toggled by a Flic button via a Get command.

Bret