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stuartpittaway / diyBMSv4ESP32

diyBMS v4 code for the ESP32 and new controller hardware
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Cell voltages not transmited to Venus OS #172

Closed red0909 closed 1 year ago

red0909 commented 1 year ago

the new controller firmware at pylontech setting does not report min and max cell voltage to the venus os also no module temperatures

dvcc at the venus os does not work in pylontech mode. victron will force dvcc on(its a victron hardcoded rule for pylontech)

stuartpittaway commented 1 year ago

Ok, are you using pylontech more on a victron system?

The pylontech CANBUS messages do not include as much information as the victron protocol.

If you are using victron kit, also use the victron mode.

red0909 commented 1 year ago

no i cant use victron mode because i have a mixed system sma and victron so pylontech should do it for both maybe you can add a new profile to the two existing named Pylontech + and include the voltage readings in the pylontech protocol

but this does not explain why dvcc does not work on victron system in pylontech mode

new firmware on controller and shunt, 2.92 fw on venus os

i have connected a seplos bms(for testing) in pylontech mode and it reports cell voltages and the dvcc does work too in the venus os and the sma inverter works too

you can send me an experimental controller fw if you want, i can test it

stuartpittaway commented 1 year ago

Ok - I don't have any documentation for the PylonTech CANBUS protocol which includes cell voltages.

DVCC shouldn't require those to function, just the charge voltage (which is supplied).

I wonder if the SEPLOS is mixing the CANBUS messages together (it shouldn't!) ?

Looking at this SEPLOS document... https://solaranzeige.de/phpBB3/download/file.php?id=2373

I can see it transmits 0x370 and 0x371 messages which contain cell information - but these are not part of the PylonTech documentation.

red0909 commented 1 year ago

ok got the victron canbus working with my sunny island the prevent charging is inverted ive opened an other issue. #173

in victron canbus the cell voltages are working, so it is ok for me.

this issue can be closed if there is no way to add the cell voltages to the pylontech protocol

stuartpittaway commented 1 year ago

Do you have any better pylontech documentation?

I'll take a look at #173 thanks for reporting