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@Informatic
Last active November 30, 2018 00:02
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Yi 2 Firmware reverse-engineering

Yes. It's real. These are just my notes after skimming through the firmware. (protip: update API)

Hardware revisions: 12L, 13L Internal version: z16 (it's all over the place)

Features

  • Running A9S, as everyone might've guessed
  • Seems to have EXFAT support in uITRON
  • SuperView
  • RTMP Streaming (Youtube Live)
  • USB serial / ether (will Linux get proper USB gadget?)
  • python2.7 on-board (will most probably be removed on production units but THAT'S FUN)
  • Has dbus. Really.
  • usr/lib/libical.so - not sure what they were smoking, but I like that.
  • 3.10.71 Kernel including USB host modules?
  • Confusing part: whole LTE setup script and stuff? (dank mr ambarella)

telnetd

It's still there, just create empty z16_rtos_console_enable.script file on SD card.

autoexec.ash

Nope, sadly nothing like that, only some random hooks to sdcard/MISC/lte_hook.sh in linux during LTE init. (still giggling about that)

@xamica
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xamica commented Dec 20, 2016

It's still there, just create empty z16_rtos_console_enable.script file on SD card.

Which firmware version you have? I checked this string in my firmware, but found only:
c:\disable_remove_fw_file.script
c:\check_firmware.script
firmware file c:\check_firmware.script doesn't exist!
c:\save_log_enable.script
c:\console_enable.script

Actually, c:\console_enable.script enables telnetd, but in Linux environment, not in RTOS. I checked very old version (1.0.7). available from Yi, but strings are same.

@xamica
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xamica commented Dec 28, 2016

Nobody here?

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