Problems with Holley DTZ541

[oeiber]

Hi everybody,
I have a Holley DTZ541 which is connected to my RaspberryPi using a rs485 to serial converter from weidmann elektronik.
In the vzlogger I can see the following log entries. They occour multiple times per hour.

[Nov 23 01:05:52][sml] reopen called. current fd=4

In stdout i can also see these entries multiple times per hour:

libsml: error: unrecognized sequence

Every 1-2 weeks vzlogger does have empty tuples. And the serial interface seems not to be initialized anymore. Then I have to restart vzlogger to get it working again.
I think this is related to the too short sml messages with a length of 4. In the code of libsml I sqw there is a reinit sequence everytime there is a lenght mismatch. Maybe the serial interface doesn't come up properly after reninitialization?

I also have a open pull request with a dump of my holley meter:

devZer0/libsml-testing#22

Thank you for your help!

[r00t-]

@oeiber:
have you considered the comment here, which suggests that your data is corrupt?
devZer0/libsml-testing#22 (comment)
this makes it seem likely that this is a hardware issue.
(ofcourse even then, we might want to make sure vzlogger is as robust as possible.)