single cell values in logfile / debugfile

[dakoal]

HI.

I am always logging BMS data of the different BMS's I am using. The single cell voltages are also logged, so I can see in a graph over time if one cell is faster dropping/rising.

Is there a way to get the (even the raw hex values) out of your wonderful piece of code into a /var/log/serial-starter/debug.txt ?

Thank you for your work.

[Louisvdw]

Hi @dakoal There is no such logging currently, but you can add it yourself. Logging to a log file tend to be slow and we poll the BMS data for most batteries every second so I try to keep it as light as possible.

For the battery that you are using, it's driver file will have a refresh_data(self) function. Create your own log function that you can call at the end of this function.

def log_data(self):
   # this will print to screen
   for c in range(self.cell_count):
       print ("Cell {0} voltage    {1}V".format(c, self.cells[c].voltage)

[dakoal]

Ok, I will try. It's a daly BMS. I will see if I can handle this in memory without file operation.

[Louisvdw]

It's a daly BMS.

I hope you have the Sinowealth Daly version. It has the data for each cell. The normal Daly we only use the min/max cell data that the BMS publish. In the log file it will either say "Daly/Sinowealth BMS" or "Daly BMS" connected.

[SanderV4n]

If its a Daly with Sinowealth chip then it should already print the cell voltages to the log.

[dakoal]

If its a Daly with Sinowealth chip then it should already print the cell voltages to the log.

This one: /data/log/dbus-serialbattery.ttyUSB0/current ? There is nothing logged, only if an error occurs.

[Louisvdw]

That is the correct log file for the USB0. You can chech which USB port your battery use in Remote Console uder your battery -> Device -> Connection

[dakoal]

If its a Daly with Sinowealth chip then it should already print the cell voltages to the log.

I think it's not. No single cell values there. But with a selfmade script I can check them.

[SanderV4n]

Here is an example from my log:

root@beaglebone:~# tail -f /data/log/dbus-serialbattery.ttyUSB0/current @40000000614859681c9f27f4 INFO:utils:>>> INFO: current pack current: 0.000000 @40000000614859681d9c391c INFO:utils:>>> INFO: Cell 1 voltage: 3.334000 V @40000000614859681e94ae94 INFO:utils:>>> INFO: Cell 2 voltage: 3.318000 V @40000000614859681f9e2784 INFO:utils:>>> INFO: Cell 3 voltage: 3.334000 V @400000006148596821386adc INFO:utils:>>> INFO: Cell 4 voltage: 3.335000 V

If the info stuff is not in there you might not have a Sinowealth BMS? What is in your log?

[Louisvdw]

@dakoal the latest beta has cell logging as an option. You need to edit the utuls.py line 10 and change the loggin level from WARNING to INFO to activate it. logger.setLevel(logging.INFO) https://github.com/Louisvdw/dbus-serialbattery/releases/tag/v0.9beta1 https://github.com/Louisvdw/dbus-serialbattery/wiki/How-to-install

PS @SanderV4n if you want to keep the same level of logging for your Sinowealth you need to do the same.

[SanderV4n]

@Louisvdw I was looking at your changes, they look good! The logging was mostly for development, so its fine to have it at a lower level.