Similar to the TP-Link TL-WR741ND but with PoE and a smaller antenna.
| Version/Model || Launch Date || S/N || OpenWrt Version Supported || Model Specific Notes
| v1.0 || ? || ? || 12.09 || -
| v1.1 || ? || ? || 12.09 || -
| v1.2 || ? || ? || Working with 2013-04-xx snapshot or newer ||
| v2.1 || ? || ? || trunk support? || There is a thirdparty firmware in the forums and the firmware for TL-WR740N v4 seems to work fine too
| v2.2 || ? || ? || trunk support || support added from r44063, tested on v2.0* v2.2 and v2.3 should work on every v2.x
* My v2.0 was the EU version which had firmware lock, error 18005 is displayed when trying to flash. Unlocking is explained below.
Unlocking firmware 3.16.9
Firmware 3.16.9 has a different check mechanism than other versions and doesn't allow anything to be flashed (error 18005).
A firmware must have this string at address 0x120 in order to be flashed: "00000000;45550000;"
This can be added using a hex editor. Checksum must be recalculated using mktplinkfw tool in the image builder after editing. There's a thread in the forums about that
| Ver || CPU || RAM || Flash || Network || USB || Serial || JTag || PoE
| 1 || Atheros AR7240 || 32MB || 4MiB || 1 || Mod || Yes || ? || Yes
| 2 || Atheros AR9331 || 32MB || 4MiB || 1 || No* || Yes || ? || Yes
| 2.3 || Atheros AR9330 rev 1 || 32MB || 4MiB || 1 || No* || Yes || ? || Yes
0x00000000-0x00020000 : "boot"
0x00020000-0x00120000 : "kernel"
0x00120000-0x003e0000 : "rootfs"
0x003e0000-0x003f0000 : "config"
0x003f0000-0x00400000 : "art"
Main PCB v1
The unpopulated pin header SJ1 provides a 3.3 V serial port. See photo for pinout.
Serial connection parameters: 115200, 8N1
USB Mod v1
For the USB mod you need to solder wires to the following resistors: R100 (Pin 73) and R101 (Pin 74).
The side that is soldered is facing the LED'S. The side facing the RJ45 jack is ground.
I recommend using a thin gauge wire so as not to detach the resistors.
You can solder directly to the CPU but i recommend you solder directly to the back of the above resistors as this is easier. (Please remember to orientate your board correctly.)
A 5 Volt regulator is also needed to power the USB port.(You can add a filter capacitor.)
You will not need to add any additional resistors.
I do not recommend using the USB port with the PoE unless you upgrade the power supply.
The way the USB port has been powered will only work when the power supply is plugged directly into the access point.