Ok thanks
Can we use it to make 200 volt packs ? maybe put them in series ? up to 800 volts ?
Why did you not put the shunt in the negative leg of the battery like most othe BMS do. ?
I really like your design and we will use it in production 48 volt 100 amp packs.
I donāt like ESP32 prefer the pycom boards (python fan)
We have monitoring website and would like to move the data to a sqlite DB .
Could we do a HTTP post every 5 min to dump the data as we extend the clients warranty if its monitored .
Could the controller be built in node red might be fun project.
Sorry for all the questions.
Which chips are a problem .
Thanks for your time and effort.
I think I will order some boards and shunt and CPU to build a test unit
I am also going to do my first open source monitoring project in node red .
Time to give back
Ok, so i did not test this, but found it to be very easy to install influxdb2.x, i stepped away from raspbarian and used a windows vm
I am only struggling to get a gauge for the Total bank voltageā¦
Anyone got a tip?
Stuart I raised a ticket on github, i also found that when the influx server is unavailable/the controller cant write to the server, but influxdb logging is enabled, my controller reboots.
I put that in the ticket too.
Ok, so while testing , so far I have had one spontaneous reboot, but I think it is hard to capture the serial output, because for now it seems the new firmware has made the duration between reboot less predictable and long and the test rig is in my shed, I cannot get a laptop there for very long. Because i got a preassembled controller board from someone with the esp32 module on it, I have a lot of unkowns about the build and its quality, so i have for now ordered at least a new esp32 unit (u) with external antenne.
Did do some testing with relays and rules an that seems to be working ok.
Has anyone here been tinkering with influxdbv2 dashboards? And especially the gauge part (Total bank voltage at last measurement)
Will ahās and current flow also be available via influxdb logging one i have a shunt(module) and attach that?
And are there already shunt boards available (Just one and minus shunt itself but assembled with electronics would perfecto)
Finally, although i do not quite understand all settings, i got my dashboard up and running again
Diybmscontroller to influxdb v2.0 tp grafana
Still looking to drop grafana an viualize only with influxdb to minimize resources;) (windows server 2012 vm with only 2gB ram, already doing an emailserver too)
I could not find a suitable topic regarding alternative/replacement parts. Sorry if sidetracking thread.
I understand many have troubles with chip shortages. I ordered from JLCPCB (modules & controller) when I regarded that a āsolvableā number were missing that I could hand solder. Iām NOT an expert and could use a little help.
AO3400A is missing from v440 modules. Would SQ2318BES (Mouser) be a suitable replacement?
TJA1051T/3 has many variants (2Z, 118, CM118 - cant find meaning) - would any work? Is it necessary? GitHub BOM TJA1057GT/3 also very unavailableā¦
TCA6408 - any replacement and I remember a mention itās not necessary either? Any other alternative?
Is there otherwise a sticky or something to follow except GitHub + YouTube vids? I noticed my D2 diodes are wrong way - happened on topic looking thru forum.
@stuart I am finding that the DiyBMs with the latest code is tripping the shunt or activating the relays when we either power it on or reboot it.
I think the issue for this that when it initially powers on if not all the module pull through fast enough the system reads the pack voltage as too low and activates the shunt, after about up to 1min, all the modules report in and all is well, Can I make a suggestion that on first boot/reboot the controller does not activate any of the rules for atleast 2-3mins, a form of delay ?
Hi @stuart i always thought my lcd was too dark, i only got 2.6v on the led input so i decided to follow the power.
It led me to the r21 resistor, i jumped it so i get 2.9v to the led input and now the display is much better.
Any reason why the r21 resistor exists?
consumption of the lcd goes from 57ma to 3.5ma wih the 180ohm resistor.
A limitation on the TCA9534A?
up to 800 volts ?
