[Ovmsdev] Quick update on Tazzari CAN Logs

Patrick Kapsch patrick.kapsch at mac.com
Thu Feb 21 23:39:14 HKT 2013

Hi guys,
I just wanted to give you a quick update on my reverse engineering on the Tazzari Zero CAN-Bus. I've put together the Y-Cable-Adapter to attach the service-console as well as the USB-Interface to the Bus (see picture attached). As my dealer needs to get back his tools I borrowed, I wasn't really able to dive deeply into the messages, but I found the SOC and a charge-status that indicates whether or not the car charges. I will hopefully be able to write down all values that are provided by next week. 

This is the state of charge in percentage

0x78A	75 21 F9 EF

0x775	0A A1 F9 EF 00 00 03 E8
Value 100.0%
03 E8 represent 1000 = 100.0 % SOC

Charge Status
Values to determine whether the car charges or not.

0x78A	75 21 F6 E0

0x775	0A A1 F6 E0 00 00 00 63
Value "reset" (not charging)

0x775	0A A1 F6 E0 00 00 00 00
Value "SUV" (charging)
Note: there are more than these two values while the charging comes to an end. I'll know them soon. But for now !=reset should do the job for charging true.

I'm still searching for a way to tell if the car is parked or not. As far as I know by now there is nothing on the Bus that indicates this. Is a GPS-Based determination generally possible? The OVMS would have to check the coordinates periodically and compare them. A charging process indicates a parked car as well, and could turn of the GPS comparison.

Patrick Kapsch

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