Can not install OpenWrt on Belkin RT1800

[greenergretter]

Hi,
Looking into the https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=26a6a6a60ba74875b5ef819ac5765d3bcbbb930e commit in which this router is supported, I used the https://downloads.openwrt.org/snapshots/targets/ramips/mt7621/openwrt-ramips-mt7621-belkin_rt1800-squashfs-factory.bin file to try to update the FW from the Belkin's stock Web UI. It said "installation succeeded", but the router restarts to the same stock FW.

• I'm using this device: https://www.belkin.com/support-article/?articleNum=317299 which is theoretically the same as in the open wrt device page: https://openwrt.org/toh/hwdata/belkin/belkin_rt1800_v1
• The stock FW version is the 1.0.00 build 5 Aug 21, 2020

Is there any other procedure to install OpenWRT on this router?

[greenergretter]

I struggled a lot but I finally manager. There are a couple of other posts in this forum so basically I had to

• Download the official 1.1.000.016 firmware from Belkin: FW_RT1800_V1.1.00.016_Prod_20210723_code.bin
• Connect the serial port
• Power on the router
• Force to boot the first partition
• in the web ui, install the previous official FW
• Wait the router to restart. Look at the serial port, ensure the router boots from the second partition
• in the web ui, install openwrt, factory version
• wait for the fw to install and restart
  OpenWrt should be running now

[AndrewZ]

Here is the procedure: Linksys E7350 Serial Port Problem or downgrade method - #22 by AndrewZ
Just in case you will buy another one