The blinking blue light on your Deco indicates that it’s ready to begin the setup process. When the light becomes solid blue, it means the setup is in progress. However, in some cases, the Deco continues to blink blue even after the setup is supposedly complete. If you're experiencing this issue, this post will help you understand why it happens and how to fix it. https://deco-mesh.net/why-is-my-deco-blinking-blue-even-after-deco-setup/