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N0ury / dmm_util

dmm_util is a utility for interacting with Fluke 289 and 287 Series multimeters.
MIT License
15 stars 4 forks source link

random download errors #7

Closed tdjastrzebski closed 2 years ago

tdjastrzebski commented 2 years ago

I often got random Invalid block size: xxx should be 146 errors. I tried slowing COM down but it seems Fluke 289 supports 115200bps only.
What seems to help is timeout increase to 100ms in line 522 - 'invalid block size' errors still happen but noticeably much less frequently. Would it be possible to add some retry loop? - providing that the download can be restarted at a given sample.

N0ury commented 2 years ago

I haven't succeeded in reproducing this issue. I have done a long recording, and I can read data easily. I've tried this on Windows 11 and MacOS. It worked fine on both. I'll try again

N0ury commented 2 years ago

I have finally succeeded in reproducing this issue. It should be solved in commit c92b1b1 I have tried it with a 10k measurements recording. This under Windows, Linux end MacOS. @tdjastrzebski can you please try it. Note that it's not yet in PyPi, github only. So you need to clone master repo. README is not up to date. You can run the utility by: git clone https://github.com/N0ury/dmm_util.git cd dmm_util python -m fluke_28x_dmm_util -p COMx........ You can use: -s separator (defaults to tab) -t timeout (defaults to 0.09) Don't put too high value, it would make the download too long

N0ury commented 2 years ago

@tdjastrzebski do you think this issue can be closed?

tdjastrzebski commented 2 years ago

To my surprise, the latest version works quite reliably. Maybe Python version makes a difference. As far as I am concerned, this issue can be closed.