This feature will not work with Canon cameras.
This feature works only if the pc wifi is connected to the device wifi using pc wifi network connection.
More about how to change TP-Link MR3040 firmware : http://dslrdashboard.info/tp-link-mr3040-openwrt-flash/
If you change router firmware, you will lose router original functionality and warranty; so think twice, act once.
After firmware update only things remain to connect camera to router and your pc/laptop/tablet to router using WiFi connection.An IP dialog will show up where you can set the server IP number, which in most cases will be 192.168.1.1
If you have any question or remarks, use this forum thread: http://digicamcontrol.com/forum/feature-requests/wifi-support-once-again
Before using this feature the user should pair the local machine wireless with the WU-1a/1b/D5300/D750/D5500 wireless using network connection (Like connecting to wifi router) .
Connect camera using wifi network interface. The default password is 1234567890