Hello, I have a problem.. I want to install openwrt on my tplink CPE 210 but my router is version 3.20 and the last one I get on the web to download is 3.0. What could I do about it? Thank you in advance. Greetings
How is this related to OpenWrt?
The problem is that on the open wrt website I can't find a version for my router. It's for the v3 router but not for the v3.20
Seems 3.20 is supported as 3.00, if OpenWrt is refused likely it is from yet unseen region and needs some more bits in compatibility list:
https://github.com/openwrt/firmware-utils/blob/46f373b47f69a9165154197fa99330d5f9cde85d/src/tplink-safeloader.c#L278
Use 25.10.0-rcX image https://firmware-selector.openwrt.org/?version=25.12.0-rc3&target=ath79%2Fgeneric&id=tplink_cpe210-v3 to have few more of those supported.
It won't let me load the system image from the router's website. Is there any other way to install the openwrt?
TFTP - https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=5ec205d7ac00de89510a6e71055d45aa57b705e1
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OK, get the firmware upgrade to same version you have on your router and use linux strings utility to visualize supportlist aka safeloader. Also try upgrading to same version, maybe your router was sneaked from country next door and does not even load local firmware for itself.
I am having problems installing open wrt on my CPE 210 v3.20 since I have read that the firmware version that my router has (2.3.3) does not allow either to install third-party firmware or downgrade to a previous version. What could I do in my case? Will I have any solution? I don't want the original firmware anymore 
. Greetings to everyone
Postscript
I already tried with tftp and nothing. Start with the same firmware that the computer has
Can you upload same version the device has installed already via OEM web interface?
Yes. I've done it and it loads perfectly
Use a serial connection to transfer and boot initramfs OpenWrt then transfer the sysupgrade OpenWrt image and run sysupgrade to install OpenWrt to flash.
You will need to open the case and connect a USB to 3.3 volt serial converter.
And the version and the region of it is -? Can you post a link to your local download page so we can figure out missing bits?
It's US region v3.28
https://www.tp-link.com/us/support/download/cpe210/#Firmware
And what would that process be like? Is there any tutorial to follow?
2.3.3 is encrypted, 2.3.2 is not and the support list is included in safeloader already, id project that older versions have same or lesser support list....
CPE210(TP-LINK|EU|N300-2|45550000):3.20
CPE210(TP-LINK|UN|N300-2|00000000):3.20
CPE210(TP-LINK|US|N300-2|55530000):3.20
Other regions:
UN=World
CA=Canada
ES=Americas
hmm what if it cannot pare >256 bytes support list and the 2nd half of it does not work at all....
What could I do about it? The only solution would then be to open my router?
Opening router will certainly work. Those are very easy to open, one screw near eth ports and the PCB comes out as a drawer. 99% serial pins are on and marked.
What I am allufing to - try to compile safeloader with 3 device IDs pertaining your device only in the list, ie same as it is in OEM file and try that.
Oh... I didn't understand the other message. It's just that I use google translator because I speak Spanish lol. What would it be like to compile that? Could you explain or help me? I'm new to this.
Venga, debes substituir la lista larga de todos CPE210 por una con solo tres identificadores de tuyo y compilar rplink-safeloader de nuevo , y bendecir fichero factory con programa parcheada....
Sorry to bother you so much. But I don't really know how to compile the safeloader. Is there any tutorial about it?