@MattyP281 dont need to be connected to the same hub, use automations

  @SugarBaby Thanks, but now having all the bits. The KE100 TRVs are not accessible via the Tapo app full stop. Despite the fact you can link Kasa with Tapo. So I can see the Kasa KH100 hub in the Tapo app and I could even add SOME Tapo devices to that hub but not the TRVs. Therefore you have no choice but to use the Kasa app with the TRVs. 

There was a post suggesting when the KH100 is linked to Tapo that you would see the TRVs also linked to that hub but this has obviously been restricted in more recent app updates for some reason. 

I'd love to know how the Kasa/Tapo developers minds work.. At the end of the day I guess the TRVs are a Kasa product and they've decided to not develop the linking of these to Tapo for some reason.

If I want to use my T310 temp sensors as remote sensors for the TRVs I need to reset the T310 sensors (unlinking them from the H200 hub) and link them to the KH100 hub I think. 

  @MattyP281 

Ok, so I see Tapo deleted support for them in their app. I used to have KE100 before I moved to tado and they were supported in Tapo app for sure.

Even there are old topics on Reddit and posts here that their ke100 suddenly disappeared from the Tapo app.

example: https://www.reddit.com/r/TpLink/comments/1cnh0qe/kasa_ke100_suddenly_disappeared_in_tapo_app/

example: https://community.tp-link.com/en/smart-home/forum/topic/667064

  @SugarBaby 

Yeah I think I saw that post but then someone had posted one from only October this year saying they were available in Tapo app so wondered if they'd brought them back but I'm guessing that person was maybe using an old version of the app that maybe still worked for them.

Weird thing to do, remove functionality and why continue to support the Kasa KH100 hub then. I think they themselves are confused regarding what to do with their own brands. 

  @Wayne-TP 

Thanks for confirming, just some contradictory posts out there on the forum.