Is OpenWRT compatible with TP-Link TL-MR3420 v5.1?

Installing and Using OpenWrt
1

Hello, I would like to ask whether OpenWRT is compatible with TP-Link TL-MR3420 v5.1?

Here are the details of my device:

  • Model : TL-MR3420 (EU)
  • *Hardware Version : v5.1 (written on the label)
  • Firmware Version : 1.4.0.0.9.1 v0001.0 Build 180712 Rel.61343n
  • Bootloader: Original TP-Link firmware
  • Label Info: "Ver: 5.1" is printed on the bottom sticker

I’ve found this OpenWRT guide for v5:
:backhand_index_pointing_right: https://openwrt.org/toh/tp-link/tl-mr3420_v5?s[]=*tp&s[]=*link

But my device is specifically labeled as v5.1. Is it safe to use the same firmware for v5? Are there any known differences between v5 and v5.1 regarding compatibility?

I would really appreciate any clarification or suggestions on this.

Thank you very much for your help!

Screenshot_2025_0623_074333
Screenshot_2025_0623_074333688×429 21.5 KB

2

IMG_20250623_080937
IMG_20250623_0809371920×1080 142 KB

3

In the world of TP-Link, vX.z == vX, so yes it should be safe.

1 Like
4

Thanks for the reply! I understand that TP-Link often treats vX.z as the same as vX.

That said, I’d like to ask:
Is there any official or community confirmation that the TL-MR3420 v5.1 uses exactly the same hardware (such as SoC, Wi-Fi chip, or flash layout) as the v5.0?

I ask this because sometimes manufacturers introduce silent hardware changes while keeping the same main version number.

Just looking for clarification before proceeding further.

Thank you very much for your help!

5

Not often, AFAIK.

This forum is as official as it gets, searched it for "MR3420 v5.1" ?

TP-Link <> Xiaomi.