@swamprat06 

Thanks for reaching out. I understand that you want to turn off wireless broadcasting (Wi-Fi) on your main Deco unit, while keeping your other two Deco units (connected via Ethernet backhaul) providing Wi-Fi coverage for your home. Essentially, you want your main Deco to operate in wired-only mode, without broadcasting a Wi-Fi signal.

Currently, Deco systems do not support disabling Wi-Fi on a specific unit through the app or settings—Wi-Fi controls apply to the entire Deco network. However, if your Deco model supports 'Eco Mode' and the 'Wi-Fi Schedule' feature, you can schedule Wi-Fi to be turned off for the entire network during specific times. Here’s how you can set this up:

To configure Wi-Fi Schedule:
1. Open the Deco app and go to MORE > Eco Mode.
2. Turn on Eco Mode, then enter Wi-Fi Schedule.
3. Set the time period during which you want Wi-Fi to be disabled.

Important Notes:
• When Wi-Fi Schedule is active, all networks (main, guest, IoT, and Deco backhaul) will be disabled. You will not be able to access your Deco network until the scheduled period ends.
• If you enable the "Keep 2.4GHz Wi-Fi On" option, only the 2.4GHz network will remain active, allowing continued access to your Deco network.

Unfortunately, there is currently no option to disable Wi-Fi on just the main Deco while keeping it active on the satellite units. If this feature is important to you, we recommend submitting feedback through the Deco app for future updates.

For help with setting up Ethernet backhaul see the following 

https://www.tp-link.com/us/support/faq/1794/