@kutzki
See if the following helps if not please get back to us Thank You
Okay, I understand that you have successfully set up a 3-pack of Deco Mesh units, but are having trouble adding two separate outdoor Deco units to your existing network. Despite updating to the latest (Beta) firmware and performing resets and troubleshooting, the outdoor units are not joining the mesh network—they either aren't detected or fail to sync and apply settings.
Here are some steps and suggestions to help resolve this issue:
For Wi-Fi 6/6E/7 Deco models (such as Deco X/XE/BE) from the same package:
1) If the main Deco and the satellite units are from the same package, the satellite Decos should join the network automatically within a few minutes after being powered on.
2) Make sure the satellite units are placed within Wi-Fi range of the main Deco. Do not connect any cables to the satellite unit's Ethernet ports during initial setup.
For satellite units from different packages (like your outdoor units):
1) Before starting setup, ensure the LED on the satellite Deco is flashing blue, indicating it is ready for setup.
2) If you do not see the 'Add Deco Unit' option in the '+' menu of the Deco app, make sure you are logged in with the owner account, not a manager account.
3) If you see the error "Unable to add Deco. Please try again later" after clicking "Add Deco Unit", wait for 30 seconds to 1 minute, then try again.
4) If you encounter the error message "We couldn't find any new Deco" or "Failed to add this device" during setup, place the satellite unit closer to the main Deco and try again. If the issue persists, close and reopen the Deco app, then try again.
5) If the satellite unit continues to flash red (disconnected from the main Deco) after setup and relocation, move the satellite unit even closer to the main Deco.
6) For more troubleshooting details, please refer to this FAQ: https://www.tp-link.com/support/faq/1447/
If you have tried all of the above steps and the issue persists, please continue working with TP-Link support and provide them with the results of these troubleshooting steps. This will help them assist you further and escalate the issue if needed.
