This guide is a little outdated, you should use OpenWrt version 21. I have created an updated Guide here.
The Technical Details#
Techdata: TP-Link Archer C7 AC1750 v5
(If you don´t want to read all of this in short it means that the Router should have enough power to run current OpenWrt versions.)
The Problem with the Versions#
The Archer C7 is supported by two major versions of OpenWrt: Version 18 and 19. But in the Forum for the Archer C7 are some threads that point out Issues with the latest release. So I am going to use the Router with Version 18 because it seems more stable.
The right Firmware Image#
When installing OpenWrt for the first time you search for a Firmware image that looks like that:
The place to search for the right Firmware is on the OpenWrt page of the router, but because I don´t want the latest version I need to search on the Download Server:
Version 19: https://downloads.openwrt.org/releases/19.07.7/targets/ath79/generic/
Version 18: https://downloads.openwrt.org/releases/18.06.9/targets/ar71xx/generic/
Version 18 alternative:
The Latest Version I have found was: https://downloads.openwrt.org/releases/18.06.9/targets/ar71xx/generic/openwrt-18.06.9-ar71xx-generic-archer-c7-v5-squashfs-factory.bin
After you have the right image you need to rename it to:
Flashing the Firmware (Web interface Methode)#
I am going to use the Web interface method because it is stable enough on my Stock firmware version.
Connect to the Router via Wifi and set up a Password. After that, you can connect with an Ethernet Cable and log in. (The Stock Web interface is located here:
(The Images Below are from the TP-Link Emulator)
You just need to go to Advanced > System Tools > Firmware Upgrade Step 1:
Then select the firmware.bin and click on upgrade. This process can take up to 5 Minutes. Step 3,4 and 5:
After that, you just need to go to
http://192.168.1.1 and there is the Web interface.
The OpenWrt Webinterface LuCI: