This is a really compact and cheap router to take with you to hotels etc. to secure your internet access via VPN or redistribute a network.
I put some photos I made of the PCB online on this PicasaWeb album.
More details to be found in OpenWrt's wiki page on the router.
Installation of OpenWrt from Stock Firmware
Set the mode swich of the router to WISP (wireless ISP) and connect to it via your network cable. You should be able to reach the admin interface on http://192.168.0.254. Log in with admin/admin and go to the system section to upgrade the firmware. Get the OpenWrt 14.07 stable version at
(I also flashed the latest trunk version of OpenWrt earlier, but now I use the stable version 14.07.)
Wait a couple of minutes and your Ethernet interface should automatically receive a DHCP offer from the 192.168.1.1/24 range by the newly installed OpenWrt. You are able to connect to the router via Telnet then:
telnet 192.168.1.1 and then enter
passwd to change the root password.
For more OpenWrt hints and tricks check my other post OpenWrt on a TP-Link TL-WR1043ND Gigabit Router.
Configure WLAN network as WAN and set up a 2nd AP to redistribute the Network
Make a couple of changes to the configuration files: https://bitbucket.org/pklaus/openwrt-configurations/branches/compare/TP-Link_TL-MR3020%2Fwisp%0DTP-Link_TL-MR3020%2Fdefault#diff
Also check out my other blog post on the subject: OpenWrt: Configure WLAN network as WAN and set up a 2nd AP to redistribute the Network.
- TP-Link TL-MR3020 in the OpenWrt Wiki
- Official TP-Link TL-MR3020 Product Page
- Compare prices for Germany on http://geizhals.at/de/697333
- Another blog post on the MR3020: http://wolfgang.reutz.at/2012/04/12/openwrt-on-tp-link-mr3020-as-infopoint-with-local-webserver/
- Going back to stock firmware
- 3G/4G Compatibility List for the Stock Firmware