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README.md
acc_id_spoof.c

README.md

This program can be used to send bytes on the ACC_ID pin of the iDevice in order to identify as a genuine lightning controller and open the data bus and power line.

This is intended to run on an Arduino but other AVR boards can be used.

Use the acc_id_sniff program to sniff the bytes sent by a genuine controller and copy them in the response array in acc_id_spoof.c (leaving 0xFF bytes for the bytes sent by the iDevice).

The ACC_ID pin must be connected the the pin PD3 of the board (Digital pin 3 of the Arduino Uno, or digital pin 18 of the Arduino Mega). But any other digital pin could be used, you just have to modify the code for that.

The code is not written with the Arduino IDE. Here are instructions for compiling and uploading the code:

  • For Arduino Uno:
avr-gcc -DF_CPU=16000000UL -mmcu=atmega328p -Os -o acc_id_spoof.o acc_id_spoof.c
avr-objcopy -O ihex -R .eeprom acc_id_spoof.o acc_id_spoof.hex
avrdude -V -F -c arduino -p m328p -b 115200 -P /dev/ttyACM0 -U flash:w:acc_id_spoof.hex
  • For Arduino Mega:
avr-gcc -DF_CPU=16000000UL -mmcu=atmega2560 -Os -o acc_id_spoof.o acc_id_spoof.c
avr-objcopy -O ihex -R .eeprom acc_id_spoof.o acc_id_spoof.hex
avrdude -V -F -c stk500v2 -p m2560 -b 115200 -P /dev/ttyACM0 -U flash:w:acc_id_spoof.hex