Tom,
I am new to this, what files do I need to download to order from jlpcb? Can you spell out the steps to order the complete kit? Management module and then the BMS modules and then the components. I see the KiCAD files from 28 days ago, do we just create and order and attach that single file?
Thanks,
John
[Try with ATMEGA328P, at this moment an Arduino Uno]
Hi, at this time, controller says: Ignored request errors 319, sent 13320, received 11177.
Does anybody (with attiny841 ones) could tell me what values he/she has? Thanks
NOTE:it is on a breadboard with lots of jumpers and cables, probably, with a board and soldering components I will get better results, but I need a reference from your prototipes. thanks
I donāt think I did it right and I struggled with it for awhile.
As far as the little modules You go to here:
https://github.com/stuartpittaway/diyBMSv4/tree/Version4.2/Circuit jclpcb will need the files listed here. You can play around with it a bit.
They wonāt have all the parts. I donāt believe there is a parts list that doesnāt include them so you may want to go a different route. I found another github entry that somebody made and cobbled the two together.
When things settle down on the design a bit Iām sure we can have a stable guide. Right now everybody is a voluntary guinea pig. 
Depending on your needs/wants/skill level it may be better to wait. If you do want to forge ahead go scrolling up and look for where I mentioned what I used for the missing control board files. It also had some component lists that I ordered: diybms-v4/11292/1131?u=tom_tijerina [Sorry I canāt post more linksā¦] I canāt post a link to the original source or to my postā¦ I mention that I got impatientā¦
I had to make a few changes though as jclpcb didnāt have all the resistors in stock. I went from 1/4w to 1/2w, and they adjusted a bit to make them fit, omitting one set. However Iām in a bit of a bind as my current BMS is sabotaging me. Here is me complaining about my current BMS failing. - YouTube and deciding to use Stuarts.
When I have a bit less going on Iāll see if I can make a video and or document on how to place an order and what is expected to build it. However its important to note that it would quickly become out of date unless we can ensure that we have a stable process. That is a decision that @stuart would need to make and commit to. Iām not sure that now is the best time to decide to do that though.
In my situation, something is better then nothing even if it breaks and I need to fix it because I COULD fix it. Not to mention there is a community of people who he are all cheating off of @stuart in school. 
If you require a working version a commercially available solution would be your better bet. If you were going to make/design your own @stuart has done much of the leg work for you and is worth using. Iām in the later camp. Iām not sure what Iām doing, but Iām sure I can figure it out.
OK, I thing I will continue to read and wait.
Thanks Tom,
John
i use it on a 24kwh nissan leaf battery, i havent had to touch it since install and its been running fine for 6months, batrium has more features but it still has alot of issues, forums are full of issues people are having with batrium
What you mean then is that it is a place without internet access.
That is.I will begin by putting it and monitor only when I go and connect. Stuart has open an issue in github to implement that option, Controller will work without internet access.
After, I will try to use mqtt communication with a GSM module.
That is my idea, but the second part could be wait a bit more.
Thanks
At the end of the day it is each individuals responsibility to determine if the system is suitable for what they are using it for.
I have put diybms through a bunch of tests and even had modules fail. The failures were not a result of stability issues but more of my lack of understanding in regards to having to use the relay module portion to cut off charging current while a cell balances. I did not experience any catastrophic failures that I would regard as dangerous. I have just completed building a 10.6kw pack that will be monitored with diybms. I am putting this pack at a recreational property that I am not at except a weekend here or there. I would not put it there if I wasnāt convinced it worked. But each individual must determine this for themselves.
how to know which component required in how many numbers? please indicate the file
No. Stick to the BOM if you want it to work with the current software
There should be ZERO ignored request errors, and ZERO CRC errors reported.
A lot of work has gone in to getting the ATTINY841 working properly, please donāt start your own journey with the ATMEGA328P - just use whats already tried and tested, the parts are not expensive.
You will start to confuse people who donāt understand you are doing your own thing!
Its in the BOM - look in GITHUB
Agreed!
Hi alcobia,
Iām interested in the remaining boards, i need 14, so i can take the rest?
Thanks, I understand what you are trying to say. Ok, i will not post anything related to ATMEGA328p. I will post if I get something good. With your reference, now I have an objetive.
One last question about your work or your knowledge.
I usually work with wireless communication (FRM69, nrf24,ā¦), I understand that your work has been done by testing a lot. Do you find dificulties testing serial communications with prototype/breadboards and jumpers? When you did the test, did you use prototype boards or always āsolder componentsā ?
Thanks
Hi All,
First of all thank you Stuart for all the nice work!
Not sure this question was already asked here.
I will have multiple (3) blocks of 7S setup, do i need a controller (Wemos) for every serial
setup or can i configure these 21 modules in a 7s3p setup in one Wemos controller?
Thanks in advance!
You can use one controller for that configuration. The controller supports up to 64 modules, 4 banks at 16 modules per bank. So you would use 3 banks with 7 modules per bank.
Nice!
Thanks for the reply.
What is the maximum Balamcing current for this BMSV4?
