Support for Smart Batteries with JBD BMS

[Techstyleuk]

I will be receiving a new 300Ah smart battery with a Bluetooth JBD BMS (https://www.docanpower.com/index.php?route=product/product/download&product_id=556&download_id=86)

There appears to be many apps that support JBD and some Node based projects. As such I asked Perplexity to create a Sensor Class and this is what was generated. I don't have the battery yet to test, and I don't know if this is any help for you?

JBDBMS.js.txt

are there other updates needed? for instance a reference in index of sensor classes?

[naugehyde]

It's hard to say without docs on the Docan protocol but maybe it's helpful.

Is there a Docan BMS Bluetooth implementation and/or documentation out there that you could point me to?

[Techstyleuk]

I haven't asked them about the App yet, but as they do not cover it on the Website, I think they may rely on the many generic apps out there for this BMS. I will ask them once they ship my battery - I have been bombarding them with questions for a while and I may be trying their patience!!

I did find a bunch of project using JdbBms.py (https://github.com/rakhmaevao/JbdBms) or https://github.com/tgalarneau/bms

[naugehyde]

I found this https://github.com/fl4p/batmon-ha/blob/master/bmslib/models/jbd.py which I think is the model you're aiming for. If so, let me know.

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On Thu, Jan 2, 2025 at 11:35 AM Jason Greenwood ***@***.***> wrote: I haven't asked them about the App yet, but as they do not cover it on the Website, I think they may rely on the many generic apps out there for this BMS. I will ask them once they ship my battery - I have been bombarding them with questions for a while and I may be trying their patience!! I did find a bunch of project using JdbBms.py ( https://github.com/rakhmaevao/JbdBms) or https://github.com/tgalarneau/bms — Reply to this email directly, view it on GitHub <#12 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ALTAIREFW4M5NXF3DKSTJ432IWIIXAVCNFSM6AAAAABUQN4TF6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKNRYGI3TIOJRHE> . You are receiving this because you commented.Message ID: ***@***.***>

[Techstyleuk]

Some really good references in there.

As soon as I get the Battery (around 10th January) I will see what info I can pull from it with one of the apps and perhaps the Pi. I will have the Pi in my basement with the battery over winter so access will be easier than it was for the Renogy, if you need it.

[naugehyde]

Great. Send Bluetooth captures if you can. The protocol looks similar to the Renogy (transmit a request command on the GATT TX service then wait on a response on the RX service). Not the best way to do it by far but we should be able to get something working. I may need to ssh in to your server to test and finalize the code. Does your server have an Internet gateway?

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On Thu, Jan 2, 2025, 12:52 PM Jason Greenwood ***@***.***> wrote: Some really good references in there. As soon as I get the Battery (around 10th January) I will see what info I can pull from it with one of the apps and perhaps the Pi. I will have the Pi in my basement with the battery over winter so access will be easier than it was for the Renogy, if you need it. — Reply to this email directly, view it on GitHub <#12 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ALTAIRFM6SOGXY5LQVO55LT2IWRIJAVCNFSM6AAAAABUQN4TF6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKNRYGM3DGMJRGU> . You are receiving this because you commented.Message ID: ***@***.***>

[Techstyleuk]

Yes, it will be on my home network all winter, so it will be the same Pi you logged into last time using Zerotier.

[Techstyleuk]

I using the project - https://github.com/tgalarneau/bms, I had to create a virtual environment and then I installed 'bluepy' then ran the commands below and got the following output

(bpenv) pi@openplotter:~/bms $ python jbdbms-4-socket-2temps.py -b A5:C2:37:2C:B3:6F -i 10 -m jbdbms
attempting to connect
connected  A5:C2:37:2C:B3:6F
Error creating socket: [Errno 2] No such file or directory
meter,volts,amps,watts,remain,capacity,cycles
jbdbms,13.41,19.63,263.24,166,300,1
meter,c01,c02,c03,c04,c05,c06,c07,c08
jbdbms,0,0,0,0,0,0,0,0
meter,c09,c10,c11,c12,c13,c14,c15,c16
jbdbms,0,0,0,0,0,0,0,0
meter,cell1,cell2,cell3,cell4
jbdbms,3354,3354,3356,3354
meter,cellmin,cellmax,delta
jbdbms,3354,3356,2

To decode this we have:
jbdbms,13.41,19.63,263.24,166,300,1
jbdbms,<Battery_Voltage>,<Battery_current_+is_charge>,,<remaining_capacity>,<Total_capacity>,

jbdbms,3354,3354,3356,3354
jbdbms,<Cell1_Voltage>, <Cell2_Voltage>, <Cell3_Voltage>, <Cell4_Voltage>

jbdbms,3354,3356,2
jbdbms,<Min_Cell_Voltage>,<Max_Cell_Voltage>, <Max_Cell_Voltage_minus_Min_Cell_Voltage>

I don't see Temperatures, I will look closer at jbdbms

[Techstyleuk]

Here are a couple of Screen shots of the App:

[naugehyde]

Thank you.

I'm going to need a bluetooth capture.

run

bluetoothctl scan on >> jason_bt_cap.log

from a command line for about 3 minutes then dm me the log file.

Thanks!

[Techstyleuk]

Data sent via Discord chat

[naugehyde]

Can you DM the results of:

bluetoothctl info A5:C2:37:2C:B3:6F

Thanks.

[Techstyleuk]

First I ran

bluetoothctl scan on

and got

pi@openplotter:~ $ bluetoothctl scan on
Discovery started
[CHG] Controller D8:3A:DD:C1:94:30 Discovering: yes
[NEW] Device A5:C2:37:2C:B3:6F DP04S007L4S200A
[NEW] Device A4:C1:38:B5:55:F2 LYWSD03MMC
[NEW] Device A4:C1:38:F2:49:3F LYWSD03MMC
[NEW] Device A4:C1:38:43:2B:19 LYWSD03MMC
[NEW] Device 40:B8:9A:1A:68:54 Living Room

and then:

pi@openplotter:~ $ bluetoothctl info A5:C2:37:2C:B3:6F Device A5:C2:37:2C:B3:6F not available
Not sure why it is unavailable, when its not

[naugehyde]

Try letting the scanner run for longer-- until it finds the battery.

[Techstyleuk]

Ran for a while:

^Cpi@openplotter:~ $ bluetoothctl info A5:C2:37:2C:B3:6F Device A5:C2:37:2C:B3:6F (public) Name: DP04S007L4S200A Alias: DP04S007L4S200A Paired: no Bonded: no Trusted: no Blocked: no Connected: no LegacyPairing: no UUID: Unknown (0000ff00-0000-1000-8000-00805f9b34fb) ManufacturerData Key: 0xb36f ManufacturerData Value: 2c 37 c2 a5 ,7.. RSSI: -59

[Techstyleuk]

[naugehyde]

That's very helpful.

Looks like the only identifying characteristic is the Name/Alias. The Manufacturer Data is just the device mac address in reverse.

From what I can see the model name is DP04S007.

I would like to reliably support other BMS from JBD (looks like they have a bunch of different models) but will start with just this one.