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[murraydr44]

I made the mistake of flashing DD-WRT's beta firmware on the DIR-810L.   I tried it for a day; it was okay.  There was no way to flash back or proceed to openwrt firmware from the web menu.   I succeeded in getting openwrt's chaos calmer installed by removing 4 screws and attaching a 3.3v serial cable with pogo pins to the serial port in the corner.  The serial console command 'mtd erase linux ' was executed successfully, prompting a novel U-Boot prompt to ask for a firmware file.  TFTPD32 from http://tftpd32.jounin.net/ helped upload the openwrt firmware to the DIR-810L.  I have been enjoying chaos calmer on the DIR-810L for 4 days now.

[KoCMoHaBTa]

There is actually pretty easy way to revert from DD-WRT - just hold the reset button for 30 seconds and you are in recovery mode, from where you can upload the stock image. Ofc the recovery mode does not provide DHCP, so you have to set your IP statically.
It is the same procedure with other D-Link routers, like DIR-615.

How did you manage to flash openWRT?
Is there an easy way that does not include making the USB port?
Can i just flash trough the web interfac, like DD-WRT?
Other peoples are saying that Wi-Fi is not working with openWRT, how did you manage to setup yours?

[FurryNutz]

I recommend referring to the DD-WRT web site for help and information regarding WRT FW and processes.

[murraydr44]

OpenWRT wifi worked on the Jan.23 image for the DIR-810L, for the 2.4 GHz band only.  Jan.31 and Feb.02 firmware image of openwrt did not have working AP mode, only client mode.  From dd-wrt to openwrt, dd-wrt firmware upgrade menu won't accept the openwrt image, so the serial cable is needed.

[FurryNutz]

Can the OEM FW be re-installed then go to OpenWRT with out the use of a serial able? 

[KoCMoHaBTa]

They dont have a factory image provided. Factory images are used for flashing from stock firmware. There is only sysupgrade image (for upgrading from older version of openWRT), for whcih the only way to flash it over the stock is trough the serial port. I'm not aware for other methods of flashing sysupgrade images.

[FurryNutz]

Just curious if this feature can be used to get OEM FW installed? 
 Emergency Recovery Mode

[murraydr44]

Haven't tried it yet, but Luci web firmware page should have no restrictions for flashing back to OEM D-Link FW,  if I want AC750 Wifi restored.

[FurryNutz]

Please check to see if that process works, if D-Links base boot loader is in tact, then maybe that can be used to install OEM FW back on to the router. Then go from there.

Let us now how it goes...

[murraydr44]

After flashing from OpenWrt to DIR810LA1_FW102B22.bin, default IP was 192.168.1.1, default password was not admin.  The top line of the D-Link start page includes: Hardware Version: A1     Firmware Version: 1.02   

[FurryNutz]

Did you use the Recovery process? default IP address should be .0.1 and blank for admin PW...

[murraydr44]

I left the 'save settings' box unchecked in the Luci firmware update menu.  If settings were saved, the router's IP would have been 192.168.81.1 .  The pppoe name and password also were filled in and working.

[FurryNutz]

Were you able to get this working? 

[murraydr44]

The box doesn't have to be opened to get OpenWrt installed.   Just install the dd-wrt  custom trailed firmware before flashing the openwrt upgrade image.  When Chaos Calmer enters beta, I'll try it again; it would be nice to retain AC750.

[FurryNutz]

Just curious if you got it working again. Ya, you shouldn't have to open the case. Recovery mode can be used to put OEM FW back on I believe.

Good Luck