Give it a static IP address, it sounds like during sleep mode the router is releasing its IP address (Im assuming you left it DHCP)
@Yasin wrote:HiInitial input of wifi p/w all works fine. However after remaining idle for some hours B205 xerox is not recognised on any of my devices. Please help.
See useful link: https://www.youtube.com/watch?v=8VCBWkPE_Tc