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fix-LF-emulation #221

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Dmytro02
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@Dmytro02 Dmytro02 commented Aug 5, 2024

The original EM4100 tag continuously sends its ID.
The root problem, in my point of view, was that CU started to "feel" the field too far to be able to modulate it deep enough,
and 3 times (LF_125KHZ_BROADCAST_MAX) of repeating takes only about 100ms, CU is still not close enough to the reader.
That is why the emulation worked only if the CU moved past the reader quickly (fly by).

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github-actions bot commented Aug 5, 2024

You are welcome to add an entry to the CHANGELOG.md as well

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github-actions bot commented Aug 5, 2024

Built artifacts for commit 6145f5c

Firmware

Client

@alexbilevskiy
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Havent tested it on a real reader yet, but it definitely works with flipper0! So this is a progress, many thanks!

@Dmytro02
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Dmytro02 commented Aug 7, 2024

Havent tested it on a real reader yet, but it definitely works with flipper0! So this is a progress, many thanks!

@alexbilevskiy Thanks a lot, hope it would be useful. Did you have any related problems before?

@alexbilevskiy
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Did you have any related problems before?

LF emulation didn't work at all on my CU

@xianglin1998
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Has anyone tested and provided more feedback on the test results?

@GameTec-live
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@Dmytro02 in discord REALLY stressed the point that this needs to be reworked in his opinion, so maybe merging as is isnt the best idea?

@Dmytro02
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Dmytro02 commented Aug 12, 2024

It is not. It is just proof of concept. Maybe, if possible, we can rework this part with @doegox (Philippe Teuwen), as I can see he is the main author of this functionality. And together, I believe, we will properly fix the issue.

@mitmarcus
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Did you have any related problems before?

LF emulation didn't work at all on my CU

worked on the bootleg ones

@Dmytro02
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Did you have any related problems before?

LF emulation didn't work at all on my CU

worked on the bootleg ones

Hello @mitmarcus ,
could you please add some more details?

@mitmarcus
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mitmarcus commented Aug 15, 2024

By bootleg I meant a chamele0n

Sadly when I purchased, I got this one instead of the original. However, EM4100X worked countless times without problems on at least 3 separate types of readers ¯⁠\⁠_⁠(⁠ツ⁠)⁠_⁠/⁠¯

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6 participants