Momentum-Apps

magspoof_flipper

Very early WIP of MagSpoof for the Flipper Zero. Currently rewriting from the ground up.

Interpolates work from Samy Kamkar's original MagSpoof project, dunaevai135's Flipper hackathon project, and the Flipper team's LF RFID app.

Courses of action to try in the event the LF coil signal is too weak:

• Attempt downstream modulation techniques, in addition to upstream, like the LF RFID worker does when writing
• Introduce a subcarrier at ~125kHz, and OOK modulate it at the desired freq of bits (~4kHz)
• Implement using the timer system, rather than direct-writing to pins
• Use the NFC (HF RFID) coil instead of or in addition to the LF coil (this is promising in my mind; Samsung Wallet's discontinued magstripe emulation would've been over their NFC coil, most likely)
• Scrap all this and stick to using an external module for TX (could likely simplify to just a resistor and some coiled wire, rather than the full H-bridge build)

Other misc things to investigate / build:

• File format, manual add, saving / loading
• Ideal timing / speed
• Precomputing bit output, and then sending ("RedSpoof" by devBioS does this, as they say they had timing issues when computing the bits live)
• Reverse-track emulate?
• Tuning of parameters like pre-signal zeros?
• "Interpacket delay" like the RedSpoof implementation?