To set up TP-Link Deco, start by disabling Power-Saving mode on your phone and, for iOS 14 and above, enabling Local Network permission. Then, download the Deco app from Google Play or the Apple App Store onto your smartphone or tablet, and log in with an existing TP-Link ID or create a new one within the app.
Before you set up your TP-Link Deco: Prerequisite steps
Before opening the box, complete these three tasks to avoid frustrating interruptions. First, disable Power-Saving mode on your phone; this feature can prevent the Deco app from communicating with the hardware during setup. Second, on iOS 14 and later, go to your phone's Settings, find the Deco app, and enable Local Network permission. Without this permission, the app cannot discover the Deco units. If you are expanding an existing network instead of building a new one, you may need to setup verizon wifi extender hardware to ensure compatibility. Third, have your TP-Link ID ready. You will need to log in with an existing TP-Link ID or create a new one within the app. Skipping these steps is the most common reason for setup failures, so take care of them now.
Connect the main Deco to your modem
Begin by powering off your modem. Once it is off, connect one Deco unit to the modem using an Ethernet cable. After the cable is secure, power on the modem first, then power on the Deco unit. Wait for the Deco unit's LED to pulse blue. This pulsing blue LED indicates the unit is ready for configuration. If the LED does not pulse blue after two minutes, press the Reset button on the unit for one second, then wait another two minutes for it to turn pulsing blue. Do not proceed until you see this light.
Configure your Deco network in the app
- Open the Deco app and tap "Let's Begin."
- Connect your phone or tablet to the Deco's default Wi-Fi network. The network name is Deco_XXXX, which you will find on the product label on the bottom of the Deco unit. You can also connect via Bluetooth if the app prompts you.
- Follow the in-app instructions to select a location for your main Deco unit (e.g., "Living Room").
- Choose your internet connection type. Common options include Dynamic IP, PPPoE, or Static IP. If you are unsure, contact your internet service provider.
- Create your new Wi-Fi network name and password. The password must be at least eight characters long.
- After creating the network, disconnect your phone from the default Deco_XXXX network and connect it to your new Deco Wi-Fi network. This completes the main Deco setup.
Add more Deco units for whole-home coverage
To expand your mesh network, power on the additional Deco units in the same room as the main unit (for Wi-Fi 6 or above models) or near an existing unit. They will typically join the network automatically within two minutes. If they do not, open the Deco app and follow the prompts to add them. A critical warning: if you are using Deco in Router Mode with an existing router, connect only the main Deco unit directly to that router. Connecting additional Deco units to the router will create a network loop, which can crash your entire network. This is a key difference from how to set up two netgear routers, mesh Wi-Fi and extenders, where loops are less common.
Troubleshooting common Deco setup problems
Non-pulsing blue LED
If the main Deco unit's LED does not pulse blue after powering on, press the Reset button for one second and wait two minutes. If it still does not pulse blue, verify that the Ethernet cable is firmly connected to both the Deco unit and the modem. Also confirm the modem is powered on and online.
Connecting 2.4GHz-only smart devices
Some smart home devices only support 2.4GHz Wi-Fi and cannot connect to a dual-band mesh network. To fix this, open the Deco app and go to More > Advanced > Fast Roaming and disable it. If the device still fails to connect, go to More > Wi-Fi Settings and temporarily disable the 5GHz network. After the smart device connects, you can re-enable Fast Roaming and the 5GHz network.
Creating a dedicated IoT network
For a permanent solution to smart device connectivity, consider creating a dedicated IoT Network via the Deco app (More > IoT Network). This separate network improves connection success and security for smart home devices, especially those supporting only 2.4GHz Wi-Fi, by isolating them from your main network traffic.
For the wider topic, see setting up routers.
