= MR3020 =
is a TP-LINK router with a single antenna non-detachable antenna and a USB port. As of this moment, this is one of the smallest routers available.


== MR3020 v1.x ==

[[Image(mr3020-s1.jpg, 300px, link=attachment:mr3020-1.jpg, border=1, alt=001)]]
[[Image(mr3020-s2.jpg, 300px, link=attachment:mr3020-2.jpg, border=1, alt=002)]]
[[Image(mr3020-s3.jpg, 300px, link=attachment:mr3020-3.jpg, border=1, alt=003)]]

The package contains the router, a power supply, a USB-A to USB-mini cable.

'''Note that this router has default IP 192.168.0.254'''

==== Hardware characteristics ====
||CPU ||Atheros AR7240 @ 400 MHz ||
||RAM || 32MB ||
||Flash ||4MB ||
||WAN or LAN ||1x 100Mbps Auto MDI/MDIX||
||WiFi || 802.11 b/g/n 150Mbps (130Mbps real) 20dBm - 100mW ||

==== Power characteristics ====
This router uses a 5V power supply, rated 2A. Its consumption was measured and is up to 120mA in normal operation - about 600mW, 180mA+ during boot. There appears to only an internal voltage regulator for the router, USB port is powered directly from the power supply.

Power consumption will be higher if a USB device is attached to its USB port!

==== PoE ====
Passive PoE injection is feasible by some soldering. Do the following:
 * Bottom side: Remove C45, R71, R68, R65, R64 (located near ethernet connector pins)
 * Connect the two pins with tracks to R65 with a piece of wire to rightmost of 4 pins at USB host connector (the one towards the center of the board)
 * Connect the two pins with tracks to R68 with a piece of wire to leftmost of 4 pins at USB host connector (the one towards to the edge of the board)

If you PoE is not 5V, consider using a step-down power regulator. For example:
 * LM2596 DC Converter Power Supply Buck Step Down Regulator can be set to 5V up to 1.5A (3A with heatsink) (available on ebay)


==== Restoring to original firmware ====
TODO


=== Disassembly ===

Opening migh prove to be difficult, because the lid is glued into place. You can cut around the edge first then open it.

=== Openwrt LED diode configuration ===
/etc/conf/system

{{{
config led 'led_usb'
        option name 'USB'
        option sysfs 'tp-link:green:3g'
        option trigger 'usbdev'
        option dev '1-1'
        option interval '50'

config led 'led_wlan'
        option name 'WLAN'
        option sysfs 'tp-link:green:wlan'
        option trigger 'phy0tpt'

config led 'led_lan'
        option name 'LAN'
        option sysfs 'tp-link:green:lan'
        option trigger 'netdev'
        option dev 'eth0'
        option mode 'link tx rx'
}}}




==== USB ====
There is already a USB connector.