LAN port randomly freezing

[djsomi]

Hi All,

I have an A16S board, which has a problem. LAN is randomly freezing, board itself keep functional, but network is going down.
Ethernet cable replug solves the issue. (or rebooting the unit)

What can be the reason behind? Makes my automations really unstable.


Thank you in advance,

Zoltan

[admin]

do you use ESPHome or KCS firmware?
can you change a ethernet cable and router's port.

[djsomi]

do you use ESPHome or KCS firmware?
can you change a ethernet cable and router's port.

I got a feeling that the board collect some voltage spikes from the electrical system. I already grounded the din rail, it helped a little, but randomly still happens. 
I'll try to swap cable and switchport, maybe I should use CAT6 shielded cable?

Its on ESPHome, LAN config is the folllowing:

Code:

# Example configuration entry
ethernet:
  type: LAN8720
  mdc_pin: GPIO23
  mdio_pin: GPIO18
  clk_mode: GPIO17_OUT
  phy_addr: 0

[admin]

CAT5 cable is OK. i think you can use a separate power supply for KC868-A16S for testing.

[djsomi]

CAT5 cable is OK. i think you can use a separate power supply for KC868-A16S for testing.

Replaced PSU, still gets frozen randomly

[admin]

you can contact with seller where you bought from. when you bought? where you bought from?

[djsomi]

you can contact with seller where you bought from. when you bought? where you bought from?

It is from official store: https://kincony.aliexpress.com/store/807891

[admin]

can you take a video of your problem, send video to whatsapp number: +86-15381188302 we will test it.

[djsomi]

I found a workaround now. One channel of the device was used to switch a motor (a ventilation fan) what caused the problem.
Strange because it was also behind a full isolated relay. Line and Null was switched by an external relay. Board just only sent line for signal.

I took it out, and using it with a sonoff mini switch. Freezing is gone.

Do you have any idea, why this is happened?

[admin]

the motor work with AC or DC power ?
if AC motor, you need add KinCony RC snubber to reduce the interference signal