Why does the App say "No WiFi" when trying to connect a device ?

Why is my device(s) offline, and how can I recover it?

Failed to discover new devices using Echo.

How to use hotspot to connect smart device?

Why smart device cannot connect to 5GHz WiFi?

Failed to connect device.

My lamp use a 3 way bulb can I replace it with this?

How to use the same switch to control multiple bulbs at the same time?