Hello! Was wondering if someone might be able to workout what i’m doing wrong?
I’ve downloaded the latest sourcecode so that i could tweak a couple of the delay counters in the main.cpp (increasing the time until the screen goes into sleep). Which is fairly critical for my application.
However when i build and upload the workspace through PlatformIO, it all works but when i serial in through PuTTY I get a “diybms: LittleFS mount failed” error.
Does anyone have any suggestions as to what i might be doing wrong?!
I wonder if i could ask on github for the official firmware feature of using voltage dividers (on the cells and the shunt input). rubenfm did the modification on his custom firmware for the shunt.
4 banks of 6v nicd connected just to monitor when one dies because some are from 2001
Hello,
It is a very simple modification, I have added a parameter called “vbus_divider” in the setting, currentmonitor, webserver, main files and in the web_src folder some more, I seem to remember.
Part of the modified code was with the //BOTANETA comment, but not all, since I have modified something and deleted it
EDIT: I reflashed the firmware to the one that is 4.5v ref and now its fine. I am guessing that it was assembled by stuart as a 4.5v but flashed with 4.096v ref firmware by mistake. All good now!
Hello! I just got a 4.90 all-in-one that I purchased off of the shopify page going. It appears to not be allowing me to calibrate it and is reading wrong… it reads 2.97 volts per cell when its actually 3.27v per cell. I’m not sure what I did wrong as these came pre-flashed from stuart directly…
They do not listen or respond to my calibration settings either which is a bit annoying, if I could set the multiplier to 1.095 then all would be good.
What do I do? I really hope I don’t have to pull it out of the enclosure as its incredibly tight where it is and would take a lot of work I was hoping to avoid…
Makes sense! And no worries, the issue wasn’t as hard to deal with as I was worried about. Now its only disagreeing with my fluke by 0.01v across the entire pack, so… I think pretty dang accurate!!
Did anybody make a shrinked 4S diybms of the v490? or do you use just the “old” v450? The addon balancer is pretty tempting, but the board is oversized for 4S.
Hello, I have used last firmware 240805 for 4.61 to start comm RS485 with Axpert King II 5kVA. It take aprox 1min to start comm, on inverter is blinking batery - this is OK, but
comm disapear after 30s on inverter is blinking error 61 - no comm with batery
in this short time invertor show almost full charged batery, in real it has 51V only (16pcs LiFePo), pylontech has 15 cells, right? It looks like invertor did not accept settings from DIYbms.
I use A and B on RS485, no ground
Invetor has 50.05 and 19.16 firmware if someone knows what can help
Down here in New Zealand, I’ve just received fresh out of the parcel from JLC these boards beautiful in black soldermask I can confirm D1 was auto-placed incorrectly, however JLC spotted it and reached out to me to confirm which orientation was correct before we entered production, and so we flipped it 180 just in time.
To get through SMA without doing most of the fiddly stuff myself I had to sub in a couple of slightly different parts, incl changing voltage reference AZ432AN to the still-available AZ431L. Hopefully it works out ok!
I also subbed the LEDs for ones selected from the ‘basic parts’ library instead, to save the additional extended-parts fee for each type.
Now I get to tackle the attinys with my oversized 1990s iron!
Wish me luck…
PS, Stuart if you’re reading this, I hope you got the JLC affiliate creds on my order - I did order them from the /RSZ link, but when I tried to use the “JLC-Stuart” coupon code it said invalid code.
so after about 4/5years ive had a failure on the diybms v4.2 a sandisk sd card burnt out stopping it from booting, this system has been on for 24/7 365days a year for like i say since it was released, just had to pop new sd card in (high endurance one this time) and off it went again
Does anybody know if you can connect to a Controller V4.6 without going via a router?
I would like to monitor the BMS on my phone but on my boat there is no WiFi network.
Can I connect to the the ESP32 via a local AP?
I don’t think the controller can do AP mode ( I’m a newbie though, so I may be wrong - please correct me if I am), but you could use a second ESP32 to provide that function on your boat without costing too much more or using much additional power.
I guess another option would be to add an LCD display, but I’m not sure if all the functionality is available from the local display or whether you need to additionally use a web client to get access to it all (others may be able to comment on this?).
Thanks for your reply.
I’ll try adding an AP with a second ESP32 but that adds an additional power consumption to the existing load on the boat. Easy enough to set up and experiment / take some measurements.
I can confirm D1 was auto-placed incorrectly, however JLC spotted it and reached out to me to confirm which orientation was correct before we entered production, and so we flipped it 180 just in time.
