Jose Vicente Campos

[Jose Vicente Campos @Jose4Vi]

@FelipeC31024269 Hola Felipe, acabo de darme cuenta que tu mensaje es de hace 1 año! lo siento mucho no se porque no lo vi

[Jose Vicente Campos @Jose4Vi]

Si te gusta el mundo del NFC, o simplemente tienes curiosidad por aprender, prueba la nueva versión del nfc-laboratory https://t.co/w79ekZ49gQ

[Jose Vicente Campos @Jose4Vi]

@gentilkiwi Hello Benjamin! I am surprised by the good capture you have obtained with a simple NESDR! Thanks!

[Jose Vicente Campos @Jose4Vi]

@gentilkiwi @airspy_com @bvernoux Thank you very much for your work to improve nfc-laboratory Benjamin!

[Jose Vicente Campos @Jose4Vi]

@5ch4um1 @jilles_com Have you tried to decode the bytes of the signal to get valid messages from the reader and card in all possible speeds and modulations? If there is any way to improve the decoding I am interested.

[Jose Vicente Campos @Jose4Vi]

@5ch4um1 @jilles_com the signal simply does not have enough dynamic range to properly detect the symbols, the card responses are very weak compared to the signal level due to the 8 bit resolution, this means that good results are not obtained using RTL-SDR , that's why I recommend using Airspy.

[Jose Vicente Campos @Jose4Vi]

@5ch4um1 @jilles_com There is nothing wrong with a classic RTL-SDR receiver, simply to decode NFC signals it is not the best option due to its bandwidth and the resolution of 8 bits per sample. Especially for the load modulation generated by the card.

[Jose Vicente Campos @Jose4Vi]

@5ch4um1 @jilles_com The main reason to need 10Msps (or more) is the complexity of decoding the card responses at high speeds like 424kbps, it is necessary to determine the shape of each symbol, the niquist frequency is not enough for it.

[Jose Vicente Campos @Jose4Vi]

@giammaiot2 @hydrabus @CyberAntani Hello, I am the author of nfc-laboratory, I think we are a great community in which we all contribute, once the misunderstanding has been clarified, let's continue working to help each other.

[Jose Vicente Campos @Jose4Vi]

@giammaiot2 @cemaxecuter Hello, I am the author of nfc-laboratory if you need help let me know