Citaq V8 (RK3368) — variant notes: recovery has no wipe-system option, seeking firmware image

[RandTD]

Adding notes on a Citaq V8 desktop terminal, since this repo covers the
H10 series and the V8 differs in a few ways that matter. Happy to expand any
section or add photos if useful.

Asking

1. Does anyone have a V8 (not H10) update.img, or individual partition
   images for this board?
2. Did V8 units ship with a TF card holding the restore image? If so, what's on
   it?
3. @Dracarys on xda mentioned rkDumper v1.1.1.0 and AndroidTool v2.38 in the
   XDA thread.
   Any reason those wouldn't work against a V8 in MaskROM? Happy to dump mine
   and contribute it here if it's useful — this repo has no V8 data yet.

Device

• Model: Citaq V8, 8" desktop POS (screen + Seiko 80mm printer in one housing)
• Reseller branding: touch2success (UK, now Foodhub). POS app is "MyPOS Manager"
• SoC: RK3368 (silkscreen Rockchip RK3368 SCAKN38015)
• Mainboard silkscreen: GY-N-LTEZ-CT-V8-V01
• RAM: 2x Samsung DDR3 · Storage: Toshiba THGBMFG7C1LBAIL eMMC
• PMIC: RK818-1 · WiFi/BT: AP6212 · WWAN: Huawei MU709s-6 (HSPA+, mini-PCIe)
• Recovery build string:
  Citaq_32-userdebug 5.1.1 LMY49F eng.idylic.20190527.200638 test-keys
• Recovery banner: RYD Recovery system v5.0
• I/O carrier board is separate: STM32F105RBT6 + 2x HR4988 steppers (printer),
  RTL8152B + HELING MT16-S1102NL (ethernet is USB 100M, not native MAC),
  2x GL850G USB hubs

Main difference from the H10-3

The factory reset guide step 5 says to select
"Format/Wipe Cache" and "Format/Wipe System", after which the device is
reimaged from a recovery ROM.

The V8 recovery menu has no wipe-system option. Full menu is:
reboot system now
apply update from ADB
wipe data/factory reset
wipe cache partition
reboot to bootloader
power down
view recovery logs
update zip form sd
update img form sd

So the V8 appears to restore via SD card rather than from an on-device recovery
ROM. Recovery logs failed to mount /mnt/external_sd (No such device) — no TF
card fitted, and I suspect the reseller pulled it before disposal.

Running wipe data + wipe cache + reboot leaves MyPOS Manager intact and still
set as default launcher, so it lives in /system.

Access confirmed

• Hidden micro-USB (JP2) on the mainboard beside the SIM slot = RK3368 OTG
• RESET (K1) and RECOVER (K3) are separate buttons under the SIM/TF cover
• Normal boot enumerates as 2207:0000, mass storage gadget, two empty LUNs
  (Product: T2S V8, Manufacturer: t2s)
• Hold RECOVER + power on → MaskROM, 2207:330a
• In recovery, adb devices reports recovery state and adb push works, but
  adb shell fails — no /sbin/sh, no /system/bin/sh, no busybox/toybox in
  this recovery, so no shell route

Goal is a home automation wall panel. Printer side is already stripped and not
coming back, so I only need the tablet board working.