Issue with Ew103

For Developers
1

[HELP] LAN Port Not Working After Migrating from HLK-7688A to E103-W20

Hello everyone,

I recently switched my hardware from the HLK-7688A to the E103-W20 module due to availability issues — the HLK-7688A is hard to source in large quantities, so I had to find an alternative.

Both modules are based on the MT7688 SoC, so I assumed they would be mostly compatible. I flashed the same OpenWrt image I had been using on the HLK-7688A onto the E103-W20, and most of my application code runs fine without any changes.

The Problem:
The LAN port is not functioning correctly on the E103-W20 with this image. Everything else seems to be working, but the LAN port either doesn't come up, doesn't pass traffic, or behaves unexpectedly (I'll update with more specifics if needed).

My Setup:

  • Previous hardware: HLK-7688A (MT7688)
  • New hardware: E103-W20 (MT7688)
  • OpenWrt image: Same image built/used for HLK-7688A
  • Application code: Working fine
  • Issue: LAN port not working properly

What I've Tried:

  • Flashed the same image that worked on HLK-7688A
  • Verified the rest of the system is functional

My Questions:

  1. Could the LAN port issue be caused by a difference in the board configuration (DTS/device tree) between the two modules?
  2. Do I need to build a new image with a device tree specific to the E103-W20?
  3. Is there an existing OpenWrt target/profile for the E103-W20, or do I need to create a custom one?
  4. Are there any known differences in the Ethernet switch configuration between the HLK-7688A and E103-W20 that I should be aware of?

Any guidance would be greatly appreciated. Thanks in advance!

Installing and Using OpenWrt > Network and Wireless Configuration For Developers Installing and Using OpenWrt #

2
  1. Yes
  2. Not very unlikely
  3. I would have used Google to answer this question
  4. Only someone who owns/owned both would be able to answer the question
3

i have checked the image configuration and came to know that it based on 7628n . but when i flash it image from https://firmware-selector.openwrt.org/ > my lan port is working normally but they don't show that ethernet is connected . but my webpage is opening . lan led is not blinking as well.

Screenshot 2026-06-22 151049
Screenshot 2026-06-22 1510491920×1080 246 KB

4

So there is a difference between these boards.
which is more likely, because different hardware vendors.

So you can login via ssh or serial ?
dmesg ?

5

yes, i login trough ssh . i found that i need tom make changes in device tree and i have to map lan led to work properly only wan port led is working fine