If your device cannot connect, please note the blinking pattern on the device which can indicate what the issue is.
No blinking: The Sensibo device is connected to the server.
1 blink: Blinking once every 2 seconds - The device is in setup mode and you launch the app and follow the setup wizard to send the device the WiFi network name and password.
2 blinks: Blinking twice every 2 seconds - The device is trying to connect to the router. If it always blinking once and twice and never goes further, it probably means that the WiFi password is wrong, or that the WiFi network is a 5GHz network (not supported by the device).
3 blinks: Blinking three times every 2 seconds - The device is connected to the router and is trying to find the server. If the device is reaching 3 blinks and no further it means that it can't find the server name. Please check your DNS configuration.
4 blinks: Blinking four times every 2 seconds - The device is connecting to the server or is doing a firmware update. If the device is stuck on 4 blinks for more than a few minutes it means that it can't establish a connection to the server. Please check that port 80 and 443 are allowed to sensibo.com and there are no firewalls preventing the connection.
*If you have a WRT router then deactivate the WMM Mode on the router and it should solve the issue.