Update Ktag Clone From 225 To 270 Exclusive ((link)) Page

The primary feature of updating a Ktag clone from version 2.25 to 2.70 is the expansion of available protocols and families, which allows the tool to support a wider range of newer car models and ECUs. Key Benefits of the 2.70 Update

  1. Go to Control Panel > Uninstall "KTAG 2.25".
  2. Delete the folder C:\Program Files (x86)\KTAG.
  3. Open Device Manager. Show hidden devices. Remove any greyed-out "KTAG" USB entries.
  • Modify the existing 225 image by applying binary patches or swapping protocol modules to emulate 270 behavior.
  • Advantages: may retain configuration and bootloader.
  • Disadvantages: error-prone and complex; requires reverse-engineering.

4. Update Procedure (2.25 → 2.68)

4.1 Bootloader Unlock

  • Connected ST-Link to SWD pins (PA13, PA14).
  • Read protection level (RDP) was Level 1.
  • Performed mass erase and set RDP to Level 0 using STM32CubeProgrammer.

: This step can take 5–15 minutes depending on your SD card speed. Do Not Disconnect update ktag clone from 225 to 270 exclusive

  • Power device and watch boot behavior; capture logs if possible.
  • Use host software to confirm device now reports firmware 270 and accepts only 270 flows.