Flipper Zero

flipper-zero

Goal: Develop Flipper Application Packages (FAPs) in C, create BadUSB/Ducky scripts, or interface the top GPIO pins with external hardware.

1. FAP Development (C API)

Flipper apps are compiled out-of-tree using ufbt (Micro Flipper Build Tool).

#include <furi.h>
#include <gui/gui.h>

int32_t my_app_app(void* p) {
    UNUSED(p);
    FURI_LOG_I("MY_APP", "Hello Flipper!");
    // Basic infinite loop until exit
    while(1) {
        furi_delay_ms(1000);
    }
    return 0;
}

Compilation: Run ufbt to build the .fap. Run ufbt launch to deploy to a USB-connected Flipper.

2. GPIO Pinout

• Placed on the top edge. 3.3V Logic (5V tolerant on most pins).
• USART: Pins 13 (TX), 14 (RX).
• I2C: Pins 15 (SCL), 16 (SDA). Use the standard Furi Hal functions (furi_hal_gpio_write()) for bit-banging or peripheral API.

3. Sub-GHz

Using the CC1101 chip. You can invoke Sub-GHz transmissions directly in firmware, or using .sub files.

• .sub file format supports raw AM/FM modulation plots (Raw IQ) or pre-parsed protocols like KeeLoq.

4. BadUSB / DuckyScript

Drop standard Ducky Script 1.0/2.0 .txt files onto the MicroSD card under badusb/.

DELAY 1000
GUI r
DELAY 200
STRING cmd
ENTER
DELAY 500
STRING echo "Hacked" > proof.txt
ENTER