Hi all, just in case. Does anyone have extra cell boards v4.21 ? I have 3, so if I could get 1 or 5 more, it would be great (so I can test some LifePo cells for now, before I order the new boards) Ideally if location is between Belgium and The Netherlands - Thanks
but the controller can run up to 128 modules. Doing the math that will suffice to 8 16S banks but i have 13 16S banks.
Also loading 128 modules on the web interface would be a huge demand for the ESP I suppose.
I will try but the web interface will be very cluttered.
That’s a lot of banks! Multiple controllers makes sense.
I know , daisy chaining controllers or aggregating data from multiple controllers would be nice. Since the controller has can bus , I would like to use that feature with my inverters , but since daisy chain is impossible at the moment , I will use them without. But my PV setup is the perfect setup for testing new code for data aggregation , Pylontech like comms. In the end my setup would comprise of 20 16S 100Ah packs , 20 controllers and 320 cell monitoring boards.
Today arrived 25 controllers , 500 V4.5 boards , 25 shunt addon boards , 25 chapulino`s board layout.
I would be more than happy to test some code regarding data aggregation.
I recently lost the SOC info for one of my batteries on the Home tab.
Now I’ve lost all the status info… is this a recent feature?
Can I get it back?
It’s still there in the Tiles tab:
Go to the tiles tab and click on the information you want on the home page.
Continuing the discussion from DIYBMS v4:
Very nice thankyou.
Sadly controller still falls over whenever I browse Storage.
Same on older version on 2nd battery. Config files are there as the OTA update was successful 
Can you describe what you mean by “falls over”? What messages do you see? Does the controller reboot?
The code version you are running includes a fix for the error message you see.
At worst, could you try another memory card and/or format the existing one on a PC, it could be corrupt.
This issue was raised and fixed over here… SD card disappeared · Issue #202 · stuartpittaway/diyBMSv4ESP32 · GitHub
As in the picture above if I browse to the Storage tab, and do nothing, I see the red bar "Cannot communicate… " after a couple of seconds and the controller restarts. I’ve tried other cards seems consistent? Seems to read the card OK after controller update so it sounds like some history on the card is causing it. Nothing else on the card. I’ve got a spare controller on the bench I can experiment with. The problem report you mention seems slightly different and I was seeing that previously although I’m not sure I tried not pressing mount before?
Ok, I would need to see the output of the usb serial console to see the actual error logs.
Hi! If there is anyone that would want to help me make the order online from JLCPCB for the new 4.6 modules. There are a few parts missing from stock, would need help with chosing alternative ones as well as avoiding any other common mistakes. I have a tendency to worry a lot, so would help a ton if someone could help me manage my anxiety when making the choices that need to be made. I can compensate you for your time. Thanks a lot!
Managed to create another small problem… Had trouble reading some old sdcards I had on the bench. The ones I could read:
blkid /dev/sdt1
/dev/sdt1: UUID=“6C50-2EDB” BLOCK_SIZE=“512” TYPE=“vfat” PARTUUID=“f8e36e66-01”
The ones I couldn’t read had no PARTUUID. If I recreate the partition table they get one.
So something subtly different on the old cards partition or filesystem.
Tried that with the offending sdcard and it works fine on the bench but still crashes in the battery.
I (150699) diybms-webreq: API call: monitor2
D (151166) diybms: Send addr=90, func=3, len=8
D (151436) diybms: Recv 97 bytes, id=90, cmd=3
I (151466) diybms-webreq: API call: storage
[143223][W][sd_diskio.cpp:186] sdCommand(): token error [13] 0x11
[143224][E][sd_diskio.cpp:621] ff_sd_status(): Check status failedassert failed: xQueueSemaphoreTake queue.c:1549 (pxQueue->uxItemSize == 0)
Backtrace: 0x40084189:0x3ffe90c0 0x4008e4fd:0x3ffe90e0 0x40095299:0x3ffe9100 0x4008f50d:0x3ffe9230 0x400e9108:0x3ffe9270 0x400edd1f:0x3ffe92a0 0x400ee3b8:0x3ffe92d0 0x4012a4ed:0x3ffe9310 0x4012a6ec:0x3ffe9330 0x4012a725:0x3ffe9350 0x4012a84a:0x3ffe9370 0x4012c84e:0x3ffe93b0 0x400edc13:0x3ffe93f0 0x400e8c18:0x3ffe9420 0x401a2de3:0x3ffe9450 0x400e7359:0x3ffe9470 0x40123d11:0x3ffe9720 0x40122aa0:0x3ffe9750 0x40123372:0x3ffe97f0 0x40121e84:0x3ffe9810 0x401a4b56:0x3ffe9830 0x40121fa9:0x3ffe9850
ELF file SHA256: 837dfffd9b1850d8
Rebooting…
ets Jun 8 2016 00:22:57
Does re-formatting the cards help?
Recreating the partition table and the filesystem made the old sdcards visible.
Recreated both on the card from the battery and it works fine on the spare controller on the bench: visible and no crashes. Put it back in the battery and it crashed as above. Presumably a physical issue of some sort. I should try swapping the display?
Display or the power supply to the controller are possible issues I would think
@Andrew_Congdon if you have a bench supply, one idea would be to try using that for a while to power the controller, you’ll be able to compare amps consumed by the controller and pinpoint unexpected peaks or shorts that get the amps over the limit set in the supply (and reboot the thing)
Hi all,
I am just about to start building the DIY Bms for my solar powerwall and i have a question about pylontech emulation. I hope is the right place to ask and not breaking any forum rules.
My inverter (voltacon conversol max gen1) does not have canbus (the manual states it has but it does not, after days of research and phonecalls with voltacon it has been confirmed only rs485 is available )
Option 1: can i use the emulation through the rs485 port of the DIY controller?
Option 2: can i use a Canbus to Rs485 bidirectional converter to connect DIY bms controller CAN to my inverter’s bms port rs485?
Any help will be much appreciated.
Many thanks
hi and welcome to the forum,
having or not having canbus is one thing.
the main issue is what protocol and instructions your voltacon conversol max gen1 inverter uses to communicate with “its” battery.
Pylontech simulation (as victron one) works with h/w that expect these particular instructions.
I’ve never heard of this voltacon you have, so no idea, just pointing out the general concept.
cheers
V.
basically Voltacon inverters are just another rebranded subsidiary OEM Voltronic (examples of other Voltronic derived invertrs: MPPSolar range, Axpert, Orient Power).
also this inverter does work (the supplier even sells kits of this inverter with pylontech batteries ) with pylontech batteries plus many more others successfully but through the rs485 port.
Tried an external power supply, no change. Changed power cable, tried power to ESP32 and 5V, no change. Put a monitor on the supply line, stable 5V 22mA with display lit and 18mA in screen saver. No change when controller crashes. Tried changing the display to a dimmer model and it crashes every few seconds without browsing! Must be something on the boards themselves… time to swap them out and try to recreate on the bench.