Hello everyone, 

My routeur always worked but suddenly I think without doing nothing some of my devices (Phone or vaccum) wasn't connected anymore. 

I tried everything to add these device to the network, they are connected to the network but they can't acces the web. 

I look on the WiFi on the smartphone and There was no ip in the WiFi settings. 

The only way is to go in the WiFi settings of the device and change from automatic to manual in the ip settings (from dhcp to manual) and then the device can access the Web again. 

But for some other device as a Rice cooker I can't access these WiFi settings so I can't make it work again. 

What is strange is everything wotked fine I didn't make any change in the routeur config. 

Can some one help me with this. 

Thanks very much.