Connection error

[jirdol]

Hello,
I'd like to ask if anyone knows why it's doing this? Everything is going OK and then suddenly the outages start, see picture. In the log I looked it says this. Usually the outage is a few seconds but sometimes tens of minutes :(

WARNING 192.168.8.136: Connection error occurred: EOF received
INFO Processing unexpected disconnect from ESPHome API for 192.168.8.136
WARNING Disconnected from API
INFO Successfully connected to 192.168.8.136

And i also noticed this in the log, what could it be? Thank you.

[11:00:03][W][component:204]: Component jk_modbus took a long time for an operation (0.89 s).
[11:00:04][W][component:205]: Components should block for at most 20-30ms.

[Uksa007]

Check the uptime on the ESP32 to ensure its not rebooting.

Looks like Wifi connection issues to me, check the wifi signal strength and channel for interference.

[jirdol]

Thanks, looks like some kind of wifi problem, I'll give it a try.

[jirdol]

[22:53:25][C][wifi:386]: Signal strength: -62 dB ▂▄▆█

I checked the signal strength and it's ok. I have a PV plant in a secluded cottage and there is no other wifi in the area. Sometimes it goes ok for a week and goes down for a second 2x a day. Sometimes for some unknown reason it starts dropping out 30 times an hour and it goes like that all day. When I connect to the wifi router, and check the connection there, the BMS is connected there all the time without dropping out. Other devices are running normally in HA.

[Uksa007]

Are you using one of my interface boards?
(I can't see any order from you) I would recommend using one of my interface kits.
Not all ESP32 are created equal.

[jirdol]

Hello,

one more request, can the curve be modified in the code so that the curve has a steeper fall during the absorption phase? Ideally as I have plotted in the graph.

Thank you

[Uksa007]

The absorption power you are looking at is dictated by how much current the battery is charging with at the absorption voltage, it's not limited by the code. Have a look at the current you should see it tapering off.

Edit in your case it might not be, are you using Li-Ion batteries?

[jirdol]

I'm sending you a graph of current and power. I use lifepo4. Can you think of a solution?

[Uksa007]

What are your settings, these are what I recommend for LiFePO4 16s 280AH:

charge_a: "50"
absorption_v: "55.2"
absorption_time: "30"
rebulk_offset: "2.5"
discharge_a: "100"
min_dischange_v: "48"
force_chg_v: "44"

[Uksa007]

Have you top balanced the cells?

This is how it should look if you have the cells top balanced:

[Uksa007]

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