@JimHua The EAPs use the Omada Mesh and the BE800 uses Easy Mesh, I don't think the two will work together.

@Carl @DVair , do you know if I bought the TP-Link Omada controller if that will work?

https://www.amazon.com/TP-Link-OC200-Omada-Network-Controller/dp/B07GX6GVB6?th=1

I received this from TP-Link AI Support as a response:

Thank you for contacting TP-Link support. For the question that you want to create a mesh network with BE800 and include 6 EAP660HD, please try the following suggestions.

For EasyMesh Wireless Backhaul, we recommand up to 6 units in one EasyMesh network.
For EasyMesh Ethernet backhaul or hybrid networks with both Ethernet and Wi-Fi backhaul, there is theoretically no limit to the number of units that can be added. However, we still recommend up to 6 units for better experience and performance.
Notes: 
    1. Wireless throughput and stability will not always increase as the EasyMesh device amount increases, if the wireless coverage is already enough when there are no dead zones already, it is not necessary to add more EasyMesh devices.
    2. The above recommendation is only for reference, actual throughput and performance might differ due to the house layout, obstacles, distances between EasyMesh device, etc.

The above answer was provided by AI-powered search assistant designed to reply your question based on our pre-pared knowledge base written by our agents. We hope you can get this prompt response once you contact us.

I am not sure what they are saying, except for maybe using the EAP660HD as a stand-alone AP and use the EasyMesh ethernet backhaul.

Jim

  @JimHua I don't think it will work, Omada stuff seems to work only with other Omada stuff.  The only way to make all this stuff work together would be in a non-Mesh configuration.

  @DVair Thank you for the feedback this was helpful and save me from buing a controller that will do nothing. :)

  @Carl Thanks Carl.  Just to give you a perspective of why I have business and homem product.  My home is 7800 sqft and the interior walls are insulated.  When I first moved into my current home, I found the TP-Link WiFi repeaters were not very affective and created many dead spots where I would either have to get 10+ repeaters to have good signal through out the house.  The house also came with WAP through out the house to solve the deadspot issue.  But their WAP was standalone AP and cause connection disruption.  So I updated the WAP in the house with TP-Link 660HD.  Then I recently upgraded my internet to 2Gbps and as a result, also upgraded my router.  I like the TP-Link BE800 spec so I purchased it and was thinking that the Mesh network would be compatible.  

My other option is to upgrade my EAP 660HD to a WAP that supports Easy Mesh and WiFi7.  So upgrading my EAP is not out of the question. :)

Jim