Fix Error code 18005 of locked TP-LINK TL-WR841N V9 to flash openwrt and dd-wrt firmware

TPLink applying the FCC decision regarding firmware lockouts They made re-flashing the devices with OpenWRT or DD-WRT through the webUI next to impossible However with a serial connection to the router, we can figure out how to flash whatever we want. You can also use this serial console + tftp method to debrick or unbrick your TP-LINK WR841 in case you bricked it. First, let's see what we have here TP-Link WR841N V9 Now I will come to TP-LINK site and get another flash version Now we can download the firmware And now let me flash even the original flash from TP-LINK and see what happen «Error code: 18005 Upgrade unsuccessfully because the version of the upgraded file was incorrect. Please check the file name.» So I could not flash even the original flash from TP-LINK neither DD-WRT nor OpenWrt However I will download firmware from both OpenWrt and DD-WRT and play around with them To do this way, you need to solder the serial port to your router. You can find the guide from the Internet or see my video guide how I do it. Most importance is find TX - RX and GND and connect them to your USB to TTL module And you can order this module with about $2 from ebay or Aliexpress After connect your module to router serial interface, you can use Hyper Terminal or Putty console to connect to your router But before doing that, you have to check and setup the COM port assigned to your module Set serial port speed to 115200, Data bit 8, Parity None, Stop bit 1, Flow control None Now we...