LF_MULTIHID — HID 26-Bit Multi-Card Simulator

Author: Shain Lakin Frequency: LF (125 kHz) Hardware: Generic Proxmark3

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What

Cycles through 4 predefined HID 26-bit (H10301) raw card IDs, simulating each one in sequence automatically.

Why

When you have multiple known-valid HID credentials and want to try them all at a reader without manual intervention. Edit the source with your target IDs, compile, and the device will automatically cycle through each one at the reader.

How

The firmware contains 4 hardcoded raw HID values
On startup, it selects the first slot and begins simulating
After each simulation interval, it advances to the next slot
The cycle repeats continuously until exit

LED Indicators

LED	Meaning
A/B/C/D (binary)	Currently selected slot number

Button Controls

Action	Effect
USB command	Exit standalone mode

State Machine

stateDiagram-v2
    [*] --> Sim_Slot0 : Startup

    Sim_Slot0 --> Sim_Slot1 : Auto-advance
    Sim_Slot1 --> Sim_Slot2 : Auto-advance
    Sim_Slot2 --> Sim_Slot3 : Auto-advance
    Sim_Slot3 --> Sim_Slot0 : Auto-advance (cycle)

    Sim_Slot0 --> [*] : USB data received
    Sim_Slot1 --> [*] : USB data received
    Sim_Slot2 --> [*] : USB data received
    Sim_Slot3 --> [*] : USB data received

Customization

Edit the raw ID array in the source code before compiling:

// Example: change these to your target IDs
static const uint32_t ids[] = {
    0x2006EC0C86,  // Slot 0
    0x2006EC0C87,  // Slot 1
    0x2006EC0C88,  // Slot 2
    0x2006EC0C89,  // Slot 3
};

Compilation

make clean
make STANDALONE=LF_MULTIHID -j
./pm3-flash-fullimage

SamyRun — Read/clone/simulate single HID26
HID Corporate Brute — Brute force card numbers
IceHID Collector — Passive multi-format collector

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