Deye 8K-SG01LP1-EU can communication problem

[Dimidec95]

Dear Uksa,

Thanks for you work, it is great!

However my esp32 keeps rebooting in the same way Denveronly had.
Connection with the BMS seems ok, the values are being received on the ESP32.

19:07:21][I][main:330]: No rx can 0x305 reply. Rebooting...
[19:07:21][D][button:013]: 'Restart button' Pressed.
[19:07:21][I][restart.button:012]: Restarting device...
[19:07:21][I][app:134]: Rebooting safely..

My deye inverter does receive the values from the esp, and when I change the values in HA it also changes on the inverter. It just does not seem to communicate back to the ESP32.
The inverter is in lithium mode 00 and all settings are correct.

My wiring and GPIO's are correct, I tripled checked everything and also replaced my TJA1050 twice. Still same problem.

The only thing that differs is that I do NOT get 60ohms on can H&L, it fluctuates around 130-140 ohms (all devices powered on). Could this be the issue?

This is the can controller:

My esp is a simple ESP32devkit, same as yours.

I temporarily removed the reboot action from your code, but i feel i am missing some functionality.

[Uksa007]

The only thing that differs is that I do NOT get 60ohms on can H&L, it fluctuates around 130-140 ohms (all devices powered on). Could this be the issue?

Yes, has to be close to 60 ohms, when both ends are connected.

120 ohms means it is only connected/terminated at one end.
Are you sure you are using the BMS port in the inverter and not one of the Parallel ports?

Check you are using correct port and pins:
BMS Port
RJ45 Pin 4 CAH H
RJ45 Pin 5 CAH L

[Dimidec95]

Ok, I put on a new RJ45 connector. Checked the wiring and replaces the TJA1050 again for good luck. I have 60 ohms now.

But, still the same problem;

[17:45:18][I][main:318]: send can id: 0x371 hex: 1 0 2 0 1 0 7 0
[17:45:18][D][canbus:033]: send extended id=0x371 rtr=FALSE size=8
[17:45:18][D][canbus:033]: send extended id=0x35e rtr=FALSE size=8
[17:45:18][I][main:329]: No rx can 0x305 reply, Inverter not connected/responding, Rebooting...
[17:45:18][D][button:010]: 'Restart button' Pressed.
[17:45:18][I][restart.button:012]: Restarting device...
[17:45:18][I][app:134]: Rebooting safely...
[17:45:18][D][esp32.preferences:114]: Saving 1 preferences to flash...
[17:45:18][D][esp32.preferences:143]: Saving 1 preferences to flash: 0 cached, 1 written, 0 failed
INFO Processing expected disconnect from ESPHome API for jk-bms-can.local
WARNING Disconnected from API
WARNING Can't connect to ESPHome API for jk-bms-can.local: Error resolving IP address: [Errno -3] Temporary failure in name resolution

Still seems to reboot because the inverter is not communicating back?
However it is receiving data because all the BMS data shows up under the battery tab on the inverter.

The reboot occus every 33 seconds.

Any ideas?

[Uksa007]

Hi,

Can you please attach a full log file, drag and drop the file in the text box.

I would suggest:

Upgrading the inverters firmware to the latest version.
Ensuring the Battery mode is Lithium and Lithium Mode is 00 (two zeros)
Power cycling the inverter (turn of AC, Solar and Battery)

Regards

[Dimidec95]

Battery mode is correct, restarting the inverter does not help. I will contact my supplier for a firmware upgrade.
I'm on;

• HMI: Ver c34b
• Main1: Ver 3881
• Main2: Ver 717

Full log in file.
logs_esphome-web-d471cc_logs (1).txt

[Uksa007]

My other though is to check that the RX connection from the TJA1050 is connected to the correct PIN you have defined on the ESP32.
Measure with a multimeter, incase the cable is faulty.

Post a photo and the pins used.

[Dimidec95]

Did that, the cable measures 4.7k as it should. As your diagram I connected RX to RX (GPIO22) and TX to TX (GPIO23).
Weird problem I have here.

Should I try other GPIO pins for this can controller? If that is possible.

[Uksa007]

Yes you can try different pins, it seems the only thing left apart from the inverter just not sending anything.

[Dimidec95]

Before I do, here are the pictures.

[Uksa007]

Look ok as far as I can see.
Others have mentioned that they swapted cables on TX and RX on TJA1050 and it fixed their problems, not sure if some boards are labeled backwards.

Maybe worth a try.

[Dimidec95]

Swapping RX & TX stops the inverter from receiving any data so that's not it.
Changing GPIO pins to 21 & 19 does not seem to work at all, are there other preferred pins to try except 23 & 22?

I mailed Deye dor a firmware update but no answer yet, from what I can find online I am definitely behind a lot regarding the firmware nr.

[denveronly]

When I change to 00 it goes back to libms01 and no can messages are coming back.

A dumb idea, maybe try charging your battery, maybe shutdoown and stop voltage have aomr affect

[Dimidec95]

Deye updated the firmware and everything works now! Should i stay on the code you send me or go back to the one in github?

Thanks!!

[Dimidec95]

[Uksa007]

That's great news the inverter firmware fixed it and is working as expected.

You should use the github version, as the Pylon specific is probably not a good idea given you are not using Pylons standard of 15s.

Please consider supporting my work so I can continue to develop new features and provide help and assistance.

I would suggest using my Hardware interface board it's designed for production use, self contained on a PCB with RJ45 for the inverter and and is pretty much bullet proof.

[denveronly]

Deye updated the firmware and everything works now! Should i stay on the code you send me or go back to the one in github?

Thanks!!

What firmware is your deye running now?
Can you try making an alarm ?(heat one battery sensor) and see if inverter stops battery charge/drain

[Dimidec95]

See pictures. Yes it works!

[denveronly]

that is awesome and wonder why i cant get it work at mine
all i can see is alarms 0x0040
Have a few questions to you mate if you dont mind
1) What alarm codes do you see in Libms inverter page? same as mine? 0x0040?
2) Do you have BMS Err stop enabled for inverter to push the alarm or it goes off even if BMS err stop is not ticked?
3)How long does it take to have an alarm after heating? i mean is it 10-15 seconds or 1-2 minutes?

[Eumobong]

that is awesome and wonder why i cant get it work at mine all i can see is alarms 0x0040 Have a few questions to you mate if you dont mind 1) What alarm codes do you see in Libms inverter page? same as mine? 0x0040? 2) Do you have BMS Err stop enabled for inverter to push the alarm or it goes off even if BMS err stop is not ticked? 3)How long does it take to have an alarm after heating? i mean is it 10-15 seconds or 1-2 minutes?

Try my fork and see if it works for you.
My fork specifically flag the inverter (can_id: 0x35E) to do the following asides sending the alarm to the inverter:

1. stop charging for over-voltage
2. stop discharging for under voltage
3. stop charging and discharging for over temperature
4. no enable charge/discharge flag for low temperature as it won't happen in my case.

[Uksa007]

Closed due to inactivity.

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