TP-LINK WR841N (shares the same hardware with WR841ND, which has detachable antennas) is solid and powerful router coming with pretty low price tag. However the original firmware is unstable with not much customizations possible. Let’s install famous Linux-based DD-WRT firmware. Fortunately our WR841N is supported and it’s fairly simple to install this firmware.

  1. As a security measure, perform a 30/30/30 rule
  2. Determine your device hardware version
  3. Go to download location for build r23720 from 13/03/2014 which has been reported as working fine
  4. Search for your device specific build with the HW version suffixed, like v8 in tplink_tl-wr841ndv8, and make sure you download factory-to-ddwrt.bin for the first flash of DD-WRT
  5. Open admin center of the router being connected to computer using RJ45 (not WiFi)
  6. System Tools -> System Upgrade -> Choose File and find the downloaded factory-to-ddwrt.bin
  7. Set the DD-WRT to your liking by connecting to the admin center using default IP address, user root and password admin

I was able to achieve the maximum TX power of 21 dBm with the following settings. With default settings the max TX power was 18 dBm.

Wireless Network Mode: NG-Mixed
Channel Width: Turbo (40 MHz)
Regulatory Domain: NEW_ZEALAND
TX Power: 22 dBm
Antenna Gain: 5 dBi

Tested and working with TP-LINK WR841N v8 and DD-WRT build r23598.

2 responses to “DD-WRT for TP-LINK WR841N/WR841ND”

  1. Very nice post. I just stumbled upon your weblog and wanted to say
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  2. sun says:

    Thanks, it helped. I get 21dBm

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