Hello.
login to the router by ssh
vi  /etc/opkg.conf and comment with # line "option check_signature 1"  save changes
vi /etc/opkg/distfeeds.conf and replace "downloads.openwrt.org/chaos_calmer/15.05/ramips/mt7620/packages" to
"downloads.openwrt.org/snapshots/trunk/ramips/mt7620/packages" save changes
reboot the router
login to the router by ssh
opkg update
opkg install luci

Picked a new router on a sale, and I successfully installed the image from the wiki via tftp.

Since openwrt is not compiling with luci, I applied the patch to LEDE Stable and made my image (I need heavy customization), which successfully upgraded.
However, the patch is missing network and led configuration, so beware if you clear the settings.

Something that did not work out.
I checked the signature verification, changed the repository.
But at installation writes so:
root@OpenWrt:~# opkg install luci
Package agetty version 2.25.2-4 has no valid architecture, ignoring.
Package ar version 2.24-3 has no valid architecture, ignoring.
Package arptables version 0.0.4-1 has no valid architecture, ignoring.
Package atm-aread version 2.5.2-5 has no valid architecture, ignoring.
Package atm-atmaddr version 2.5.2-5 has no valid architecture, ignoring.
Package atm-atmdiag version 2.5.2-5 has no valid architecture, ignoring.
~~~~~~~~~~~~~~~~~~~
Collected errors:
* satisfy_dependencies_for: Cannot satisfy the following dependencies for luci:
*      luci-mod-admin-full *
* opkg_install_cmd: Cannot install package luci.

Looks like opkg used repo 15.05, not a trunk.
downloads.openwrt.org/chaos_calmer/15.05/ramips/mt7620/packages/base/agetty_2.25.2-4_ramips_24kec.ipk
downloads.openwrt.org/snapshots/trunk/ramips/mt7620/packages/base/agetty_2.28-1_ramips.ipk

Do you reboot the router after changed the repository?

I think we can use 15.05 repo after "opkg --add-arch ramips_24kec:10"

Thank you my friend!
At me all has turned out.
It was necessary in distfeeds.conf on all lines to replace "downloads.openwrt.org/chaos_calmer/15.05/ramips/mt7620/packages" with "downloads.openwrt.org/snapshots/trunk/ramips/mt7620/packages", and I did only one.
After I corrected all the lines and rebooted the router the web interface was installed!

I cannot install LuCI, I've been trying for a while now. I also can't ping Google (8.8.8.8), so I'm not getting any internet access. Does anyone have an idea on why?

Hi!

How is the router connected to the network?
Do you disable/configure firewall?
What is in routing table?

Hello again)
I'm trying to install a 3G modem support. When installing the kmod-usb-serial-option package, I get this error:
Collected errors:
* satisfy_dependencies_for: Cannot satisfy the following dependencies for kmod-usb-serial-option:
*     kernel (= 4.4.14-1-5fa396183cab7ca3cc58f29bcf99b162) *     kernel (= 4.4.14-1-5fa396183cab7ca3cc58f29bcf99b162) *     kernel (= 4.4.14-1-5fa396183cab7ca3cc58f29bcf99b162) *
* opkg_install_cmd: Cannot install package kmod-usb-serial-option.
----------------------
Other packages are installed without problems, but the modem is not detected

(Last edited by alexguest on 14 Apr 2017, 14:14)

The router is connected to the internet by a cable modem (DHCP) into the WAN port. I have not changed anything in the firewall or routing table, they are both default.

Hi!
I bought this router and put OpenWRT on it succesfully, now i'm wondering if there is any chance of getting 5GHz support for this device in the future

Also i have a problem with minidlna because there is no package available. Google search showed me that it is listed under broken packages at BuildBot.

Is there any other way of getting this package (i'm pretty newbie)?

Thank you

Hello

I have this router and wanted to install openwrt.

Is there any manual or video with the instructions step by step.  (Sorry i'm a noob)

I will see if I can make one this weekend.

Nice.

Linaro successfully ported the Archer C20 v1 to LEDE and a Pull request has been made.

(Last edited by DjiPi on 11 Sep 2017, 18:46)

Hi, you soveld this problem? I have same error, but in kmod-usb-storage... somebody help me, i am noob...