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iceman1001
2020-09-17 06:53:27 +02:00
parent 5c31ad2f91
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doc/cloner_notes.md
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@@ -64,8 +64,17 @@ If t55xx write b 2 d 2D782308 1
```
# Sniffing the comms
The T55x7 protocol uses a pwm based protocol for writing to tags. In order to make decoding easier when doing lf sniffing try the new command as seen below instead
The T55x7 protocol uses a pwm based protocol for writing to tags. In order to make decoding easier try the new command as seen below instead. It will try to extract the data written.
```
lf config s <x bytes>
lf t55xx sniff
```
-- if you have a save trace from before, try
data load xxxxxxx.pm3
lf t55xx sniff b
```
It uses the existing `lf sniff` command to collect the data, so setting that first as per normal sniffing is recommended. Once you have a sniff, you can "re-sniff" from the stored sniffed data and try different settings, if you think the data is not clean.
As normal, the cloner may write data past the end of the 40K sample buffer. So using the `lf config s <x bytes>` then re-run the sniff to see if there is more data.