Login web interface of WR1042ND and go to DHCP---DHCP Client list to check if Chromecast is showing there. If it does, write down the MAC address. Next, go to Wireless---Wireless Statistics and check...

How did you figure out it is router issue or Nexus issue? How long does it delay? Did you connect to any other Wi-Fi network but no such a problem with Nexus 4? Try channel width 40MHz. Disable WPS...

Before you reinstall the software, did you uninstall it completely? If not, you should do that first. Later, you can download the utility (TL-WR1043ND_V2_USB Printer Controller_Utility_140613) from...

Did you read its user guide? When the switch IP Address is not in the same subnet with host IP Address, it can be discovered by the utility, but you cannot login the utility management page....

Submit a ticket here to report this problem. :) http://ticket.tp-link.com/index.php?/Tickets/Submit

Darin, this article should be helpful. http://www.tp-link.com/en/article/?faqid=715