[GH-ISSUE #385] ZKong/Goodix GR51xx based tags #2438

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sascha_hemi · 2026-03-20T21:06:34+01:00

sascha_hemi commented

2026-03-20 21:06:34 +01:00

Originally created by @silverchris on GitHub (Oct 26, 2024).
Original GitHub issue: https://github.com/OpenEPaperLink/OpenEPaperLink/issues/385

Hey Everyone,
Didn't see a more appropriate place to ask this. I have come into a number of these from a business closure, and am trying to repurpose these.
Before I get too deep into reverse engineering them myself, has anyone already started this process?

They are to be Bluetooth based, at least the ones I have looked at so far.

Originally created by @silverchris on GitHub (Oct 26, 2024). Original GitHub issue: https://github.com/OpenEPaperLink/OpenEPaperLink/issues/385 Hey Everyone, Didn't see a more appropriate place to ask this. I have come into a number of these from a business closure, and am trying to repurpose these. Before I get too deep into reverse engineering them myself, has anyone already started this process? They are to be Bluetooth based, at least the ones I have looked at so far.

sascha_hemi closed this issue

2026-03-20 21:06:34 +01:00

sascha_hemi commented

2026-03-20 21:06:35 +01:00

@atc1441 commented on GitHub (Oct 26, 2024):

Hey. These are not supported or looked into so far

@atc1441 commented on GitHub (Oct 26, 2024): Hey. These are not supported or looked into so far

sascha_hemi commented

2026-03-20 21:06:35 +01:00

@silverchris commented on GitHub (Oct 26, 2024):

Cool, if I find out anything useful, I will try and contribute it or at least notify about it!
I am hoping to figure out the protocol so they don't need to be reflashed, but that is being optimistic. Hoping I can dig out the configuration of the display and such as well.

@silverchris commented on GitHub (Oct 26, 2024): Cool, if I find out anything useful, I will try and contribute it or at least notify about it! I am hoping to figure out the protocol so they don't need to be reflashed, but that is being optimistic. Hoping I can dig out the configuration of the display and such as well.

sascha_hemi commented

2026-03-20 21:06:35 +01:00

@atc1441 commented on GitHub (Oct 26, 2024):

Sounds good

Only thing to note here. We in this project only talk and will do anything custom and nothing stock firmware or Protocol related so a reflash is always needed.
We do not want to annoy any manufacturer with our tinkering.

@atc1441 commented on GitHub (Oct 26, 2024): Sounds good Only thing to note here. We in this project only talk and will do anything custom and nothing stock firmware or Protocol related so a reflash is always needed. We do not want to annoy any manufacturer with our tinkering.

sascha_hemi commented

2026-03-20 21:06:35 +01:00

@silverchris commented on GitHub (Oct 26, 2024):

Of course! I will keep the reverse engineering in it's own repo, and just pass back the useful hardware stuff for OpenEPaperLink.

Hoping there is a non-destructive way to reflash them, as the larger display I opened has the test points facing he screen, and it did not disassembly easily.

The Goodix chips do seem to have a bluetooth firmware recovery method in the rom, though, so I have some hope for that.

@silverchris commented on GitHub (Oct 26, 2024): Of course! I will keep the reverse engineering in it's own repo, and just pass back the useful hardware stuff for OpenEPaperLink. Hoping there is a non-destructive way to reflash them, as the larger display I opened has the test points facing he screen, and it did not disassembly easily. The Goodix chips do seem to have a bluetooth firmware recovery method in the rom, though, so I have some hope for that.

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Reference: starred/OpenEPaperLink#2438