[GH-ISSUE #272] Price tag address changed? #1813

New Issue

sascha_hemi · 2026-03-20T20:06:16+01:00

sascha_hemi commented

2026-03-20 20:06:16 +01:00

Originally created by @ov1d1u on GitHub (Mar 14, 2024).
Original GitHub issue: https://github.com/OpenEPaperLink/OpenEPaperLink/issues/272

One of my price tag had low battery. I replaced the battery but it took me a few tries because the batteries were losing contact as I tried to put the cover back. Because the tag was in sleeping state after installing the batteries, I even shorted out the battery terminals (as instructed). Now it looks like the tag's MAC address changed, it was 0000021b0a593b19 but now it is 0000ffffffff3b19. Did I do some kind of reset while I was trying to put the cover back or is it expected for the address to change when shorting out the battery terminals?

To Reproduce
Steps to reproduce the behavior:

Remove the batteries
Be clumsy while installing the new batteries
Maybe even try to reset the tag by shorting the battery terminals

Expected behavior
The tag's address should not change

Screenshots

The leftmost tag is essentially the same with the rightmost one

Originally created by @ov1d1u on GitHub (Mar 14, 2024). Original GitHub issue: https://github.com/OpenEPaperLink/OpenEPaperLink/issues/272 One of my price tag had low battery. I replaced the battery but it took me a few tries because the batteries were losing contact as I tried to put the cover back. Because the tag was in sleeping state after installing the batteries, I even shorted out the battery terminals (as instructed). Now it looks like the tag's MAC address changed, it was `0000021b0a593b19` but now it is `0000ffffffff3b19`. Did I do some kind of reset while I was trying to put the cover back or is it expected for the address to change when shorting out the battery terminals? **To Reproduce** Steps to reproduce the behavior: 1. Remove the batteries 2. Be clumsy while installing the new batteries 3. Maybe even try to reset the tag by shorting the battery terminals **Expected behavior** The tag's address should not change **Screenshots** <img width="711" alt="Screenshot 2024-03-14 at 09 59 32" src="https://github.com/jjwbruijn/OpenEPaperLink/assets/1385202/45097cce-d26e-49d9-bde0-acf03f646122"> The leftmost tag is essentially the same with the rightmost one

sascha_hemi added the bug label 2026-03-20 20:06:16 +01:00

sascha_hemi closed this issue

2026-03-20 20:06:16 +01:00

sascha_hemi commented

2026-03-20 20:06:17 +01:00

@jjwbruijn commented on GitHub (Mar 16, 2024):

I'm afraid you discovered a hardware voltage glitch! There isn't a whole lot we can do about this; if you run a microcontroller on a bad power supply, it can do all kinds of weird things. Since we don't have proper brown-out detection, there isn't much we can do to fix this.

@jjwbruijn commented on GitHub (Mar 16, 2024): I'm afraid you discovered a hardware voltage glitch! There isn't a whole lot we can do about this; if you run a microcontroller on a bad power supply, it can do all kinds of weird things. Since we don't have proper brown-out detection, there isn't much we can do to fix this.

Sign in to join this conversation.

1 Participants

Notifications

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: starred/OpenEPaperLink#1813