Hi everyone,  
I’m looking for help updating the MCU on my **QIDI X-MAX 3** to get Klipper running properly on the latest supoorted version like raccomended on github.

**Current situation:**

* Klipper is installed on a Raspberry Pi / PC with Python 3.7.
* MCU version is **0.10.0**, while Klipper requires at least **v0.13.0**. wich is installed locally
* When trying to connect Klipper to the printer, the display shows:MCU Protocol Error MCU2: Unable to connect Once the underlying issue is corrected, use the firmware restart command

**What we’ve tried:**

* MCU firmware flash via **SD card**, following the standard procedure:
   1. Compile firmware with `make menuconfig` and `make -j4`.
   2. Create `X_4.bin or mks_skipr.bin` on a FAT32-formatted SD card.
   3. Insert SD card into the MCU slot and power on the printer.
* Result: the firmware does not seem to update, and the MCU still shows connection errors on the printer display. The display shows error messages during the process.
* DFU mode also doesen't seems to work pressing boot and reset

**Questions:**

1. Is it normal that the display shows nothing clear during a DFU/SD flash?
2. Is there an alternative method to force MCU firmware update?
3. Has anyone experienced a similar issue with the QIDI X-MAX 3 and Klipper?
4. After doing this several times the display still shows that error

MCU Protocol Error on QIDI X-MAX 3 with Klipper