Is it possible to have an entity for each battery that will receive a pulse when the counter starts?
YamBMS JK-BMS-CAN with new Cut-Off Charging Logic (open-source)
- Thread starter Sleeper85
- Start date
Yes, it would be possible to have a binary sensor (on/off) to know if the counter has started or not.
I confirm this issue with the latest version of esphome.
This does not only affect LilyGo T-CAN485 but all boards equipped with an RGB LED like Atom S3 Lite or ESP32-S3 DevKitC-1 etc.
As a quick fix, edit your board.yaml file and comment out the rmt_channel line, which is now an Arduino-only option.
I still need to assess the impact of this change (for those still using ESP-IDF 4) before releasing a new version.
You can use the example YAML shown by the arrow and configure the YAML to use the LiliGo-T-Connect board.
Keep only BMS 1 to 4. If necessary, send me a PM and I will make the YAML for you.
I'm having no problems compiling this YAML with the latest version of esphome.
Did you follow the esphome installation procedure correctly?
Including the Windows tips?
Installation procedure
Fixed and published on GitHub.
Hi, I got it running so far after flashing. But if i pull the power cable and start it again it does not boot normaly. It just show this. After flashing again it starts working as it should do. What`s wrong? I'am using LILYGO Tcan. 
This is after flashing
This is after flashing
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@netsioux
Please read the doc.
I haven't encountered any problems with T-CAN485 in my last tests.
I noticed that your WiFi signal is not good, which can cause reboots.
I've never had a problem with memory loss after a reboot and having to re-flash, but I've read it several times.
That said, I don't use HA esphome addon to flash my ESP32, I do it from my laptop running Linux.
Please read the doc.
I haven't encountered any problems with T-CAN485 in my last tests.
I noticed that your WiFi signal is not good, which can cause reboots.
I've never had a problem with memory loss after a reboot and having to re-flash, but I've read it several times.
That said, I don't use HA esphome addon to flash my ESP32, I do it from my laptop running Linux.
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Hi.
I've been playing around with installing YamBMS on an ESP32-C3_ETH01-EVO board for a while now.
Since my battery is in a place where WiFi reception is very poor, Ethernet connection is crucial (and POE as an added bonus).
I actually found this board not to be as user-friendly as I expected - mainly because I can't use OTA firmware updates (or maybe someone knows how to get this board to accept OTA from esphome)
So I searched Aliexpress for boards with Ethernet (and POE) support and found ESP32-S3-POE-ETH - I assume it's a waveshare clone.
It has a lot of exposed GPIOs, so plenty of room for expansion.
I'm using this board with isolated M5Stack CAN and RS485 accesorries - for connectivity with 2xPB2A16S20P
I've been using this setup for over two weeks now and I can definitely recommend this board for YamBMS when Ethernet connectivity is needed.
One thing that I can't figure out is obroard RGB LED. Maybe someone more experienced with eshome will figure this out.
For anyone who wants to use the same board, I have included a ready-to-use yaml file (rename txt to yaml) that should be placed in the YamBMS /packages/board directory.
Also add this additional entry in the board selection section of the main YamBMS yaml file:
I've been playing around with installing YamBMS on an ESP32-C3_ETH01-EVO board for a while now.
Since my battery is in a place where WiFi reception is very poor, Ethernet connection is crucial (and POE as an added bonus).
I actually found this board not to be as user-friendly as I expected - mainly because I can't use OTA firmware updates (or maybe someone knows how to get this board to accept OTA from esphome)
So I searched Aliexpress for boards with Ethernet (and POE) support and found ESP32-S3-POE-ETH - I assume it's a waveshare clone.
It has a lot of exposed GPIOs, so plenty of room for expansion.
I'm using this board with isolated M5Stack CAN and RS485 accesorries - for connectivity with 2xPB2A16S20P
I've been using this setup for over two weeks now and I can definitely recommend this board for YamBMS when Ethernet connectivity is needed.
One thing that I can't figure out is obroard RGB LED. Maybe someone more experienced with eshome will figure this out.
For anyone who wants to use the same board, I have included a ready-to-use yaml file (rename txt to yaml) that should be placed in the YamBMS /packages/board directory.
Also add this additional entry in the board selection section of the main YamBMS yaml file:
This way any yaml updates from github shoud be easier.
If I have my rebulk threshold set to 53.3V, it switches to bulk at 53.15V. If I have it set to 53V, then it switches at 52.85V. Is this 0.15V offset expected? I also notice that with the charge voltage set to 55.2V, it charges to 55.4V.
FWIW my BMS generally reads about 0.2V higher than the inverter.
FWIW my BMS generally reads about 0.2V higher than the inverter.
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Thank you for sharing I will check and add your board.
Does that correspond to this Waveshare model ?
ESP32-S3-ETH - Waveshare Wiki
Thank you for sharing I will check and add your board.
Does that correspond to this Waveshare model ?
ESP32-S3-ETH - Waveshare Wiki
www.waveshare.com
I compared the pinout descriptions and board photos and everything looks exacly the same as original Waveshare board.
You've just answered your questions. I had planned to write a post about this, but this project has already taken me a lot of time, and I haven't done it. Obviously, the inverter and BMS must be calibrated for this to work properly. If the inverter can't be calibrated, you can use the inverter offset voltage to correct the requested charge voltage. The code relies on the average BMS voltage and has no insight into the inverter voltage.
I have a question: Can I use "bms_combine_JK-PB_RS485_bms_full.yaml" with LILYGO T-CAN instead of "bms_combine_JK-PB_RS485_bms_minimal.yaml" I want to see the voltages of the individual cells on the dashboard.
update:
Just tried it and it works!
update:
Just tried it and it works!
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I have a question: Can I use "bms_combine_JK-PB_RS485_bms_full.yaml" with LILYGO T-CAN instead of "bms_combine_JK-PB_RS485_bms_minimal.yaml" I want to see the voltages of the individual cells on the dashboard.
update:
Just tried it and it works!
Yes it works but this requires more work from the ESP32.
What do you think, how many bmses can I run with full bms.yaml on one ESP32?
SomethingAppropriate
Cannibalism starts with a kiss.
3 works fine, i bet 5 would work.
You may be sacrificing stability and uptime consistency with any over 3.
This is how it worked for me:
copy the packages folder (Github) via samba to HA Esphome folder
Make a new device in ESPhome builder in HA.
Copy the multi-bms_JK-PB_RS485_mode2_LilyGo-T-CAN485.yaml to the device and overwrite the existing one complete
Compile it and save the file. (do not install it over the air)
Install the file with ESPhome webinstaller on Lilygo T-can
Delete the device in ESPhome builder
Start Lilygo T-can
It will be recognized by HA and then configure it
connect it to your Battery and Inverter and have fun.
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3 is totally fine to me
right now I have one running but I wanna upgrade soon to at least a second bms. It work really good and I'm happy with it. Due to the possibity to set a voltage offset my battery reached the 100% state and went into float mode the first time.
SomethingAppropriate
Cannibalism starts with a kiss.
3 is totally fine to me
Yambms is awesome.
The home assistant features are next gen.
I got 2 Jks in home assistant
I can see all the cells, soc's, and current in graphs. I have 8 months of daily cell voltages now! I can see what each BMS is doing for any load.
All I can tell you is that I'm using YamBMS with 7x JK-PB and an Atom S3 (ESP32-S3).
ESP32 is less powerful, and I don't know how far you can go.
If you have problems, the solution is to reduce the number of entities, which is why I created minimal versions.
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