I'm usually a patient guy but this is really getting on my nerves. Bought a new router first I had a Belkin n1 Vision and now a Linksys WRT54G2 but that did not solve the problem. Same problem here - bought 2 duets last week. You can find the IP of the Controller by browsing to Settings -> Advanced -> Remote Login, when you enable SSH you will see a message at the bottom of the screen showing the Controllers IP address. If you happen to reproduce this behavior (red wireless icon after sleep) please check the DHCP client table within your router (often called LAN status or similar) and compare the IP address assigned to your Controller with the IP the controller. If you have questions about what connection type you're using, please see here: Also please let us know if this is a "standard wireless" setup or bridged (Receiver connected via Ethernet), and finally the firmware version of the controller available in Settings -> Advanced -> About. As well please share your wireless encryption settings, and DHCP status. If you see this please reply to this thread with your wireless router / access point model number and version, and firmware version. A typical case of this seems to be after setting Controller down (not in charger) for a period of time, then waking the controller and seeing a red wireless icon. For anyone noticing their Controller not properly reconnecting to their wireless network after sleep please share a few details if you have time to help me out. There are a number of network related issues that can occur with Duet and Controller, I could use some information in this particular case.