Products > Test Equipment

Brymen firmware updates and changelogs

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metaentity:
Hello EEVblog forum!

I've recently heard that the Brymen BM869s backlighting time has been extended to 240s. Is it true?

Moreover, is there a reliable source to get the changelogs for the firmware updates of Brymen DMMs?

Finally, how to check which firmware version is installed on a given DMM?

Thank you very much for your expertise.

metaentity:
Just received some info from Marco of Welectron. Yes, the backlighting time of the BM869s has been extended to 256s (a change that many users were waiting for).

Alas, there is no publicly available revision history for Brymen firmwares.

SMB784:

--- Quote from: metaentity on January 25, 2021, 11:54:18 pm ---Just received some info from Marco of Welectron. Yes, the backlighting time of the BM869s has been extended to 256s (a change that many users were waiting for).

Alas, there is no publicly available revision history for Brymen firmwares.

--- End quote ---

How does one go about updating the firmware? Judging by what I have read, the microcontroller appears to be one-time programmable, so it doesn't look like it can be updated without a new chip.  I wonder if this issue has been fixed for the 867s as well? I would really like a longer backlight timer.

radiolistener:
yes, the backlight turns off very early, this is very annoying  :rant:

metaentity:
There might be a way, but it's not publicly available and it might throw off the calibration. Joe Smith, during his video reviews of the new Brymen BM786, found a bug in the meter and then Brymen gave him a new updated firmware to update his existing model.

https://youtu.be/Vgmf4mgDyHE

But I think it was an exception because the meter was under testing. I would be in favor of updating my meter at my own risk if Brymen released firmware updates. But I also understand the hassle it would be for Brymen to ship the firmware, explain how to use it, help people who mess up their meter, etc.

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