# Flashing SD Card not working

**URL:** <https://klipper.discourse.group/t/flashing-sd-card-not-working/792>\
**Category:** General Discussion\
**Created:** [August 30, 2021, 6:05pm UTC](https://klipper.discourse.group/t/flashing-sd-card-not-working/792 "2021-08-30T18:05:42Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![nicedevil](https://avatars.discourse-cdn.com/v4/letter/n/858c86/32.png) [@nicedevil](https://klipper.discourse.group/u/nicedevil)\
**Post date:** [August 30, 2021, 6:05pm UTC](https://klipper.discourse.group/t/flashing-sd-card-not-working/792/1 "2021-08-30T18:05:42Z")

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Heya, I just tryed flashing my MCU’s SD card with the script provided by klipper.  
This is what I have done:

```auto
sudo service klipper stop
cd ~/klipper
git pull
make clean
make menuconfig
make
./scripts/flash-sdcard.sh /dev/ttyACM0 btt-skr-turbo-v1.4

```

it all ends with this:

```auto
Flashing /home/pi/klipper/out/klipper.bin to /dev/ttyACM0
Checking FatFS CFFI Build...
Connecting to MCU...Connected
Checking Current MCU Configuration...Done
MCU needs restart: is_config=1, is_shutdown=0
Attempting MCU Reset...Done
Waiting for device to reconnect....Done
Connecting to MCU...Connected
Initializing SD Card and Mounting file system...

SD Card Flash Error: Failed to Initialize SD Card. Is it inserted?
Traceback (most recent call last):
  File "/home/pi/klipper/scripts/spi_flash/spi_flash.py", line 1159, in main
    spiflash.run()
  File "/home/pi/klipper/scripts/spi_flash/spi_flash.py", line 1111, in run
    self.run_reactor_task(self.run_sdcard_upload)
  File "/home/pi/klipper/scripts/spi_flash/spi_flash.py", line 1095, in run_reactor_task
    k_reactor.run()
  File "/home/pi/klipper/klippy/reactor.py", line 269, in run
    g_next.switch()
  File "/home/pi/klipper/klippy/reactor.py", line 310, in _dispatch_loop
    timeout = self._check_timers(eventtime, busy)
  File "/home/pi/klipper/klippy/reactor.py", line 156, in _check_timers
    t.waketime = waketime = t.callback(eventtime)
  File "/home/pi/klipper/klippy/reactor.py", line 48, in invoke
    res = self.callback(eventtime)
  File "/home/pi/klipper/scripts/spi_flash/spi_flash.py", line 1074, in run_sdcard_upload
    self.mcu_conn.configure_mcu(printfunc=output_line)
  File "/home/pi/klipper/scripts/spi_flash/spi_flash.py", line 910, in configure_mcu
    "Failed to Initialize SD Card. Is it inserted?")
SPIFlashError: Failed to Initialize SD Card. Is it inserted?

```

and yes it is the right /dev/tty\* device and yes the SD card is inserted. Anyone got an idea?

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<div class="post-metadata">

**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\
**Post date:** [August 31, 2021, 5:25am UTC](https://klipper.discourse.group/t/flashing-sd-card-not-working/792/2 "2021-08-31T05:25:55Z")

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Is it your first time flash of Klipper? You can only use the script if Klipper was already flashed on the board before.

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<div class="post-metadata">

**Author:** ![nicedevil](https://avatars.discourse-cdn.com/v4/letter/n/858c86/32.png) [@nicedevil](https://klipper.discourse.group/u/nicedevil)\
**Post date:** [August 31, 2021, 10:25am UTC](https://klipper.discourse.group/t/flashing-sd-card-not-working/792/3 "2021-08-31T10:25:26Z")

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Nope it is installed for about 1/2 a year now

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<div class="post-metadata">

**Author:** ![cheung](https://avatars.discourse-cdn.com/v4/letter/c/f04885/32.png) [@cheung](https://klipper.discourse.group/u/cheung)\
**Post date:** [September 1, 2021, 8:03am UTC](https://klipper.discourse.group/t/flashing-sd-card-not-working/792/4 "2021-09-01T08:03:47Z")

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下载pi的klipper.bin改名成FIRMWARE.bin，装到skr主板的sd卡，开机

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<div class="post-metadata">

**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\
**Post date:** [August 2, 2025, 12:21pm UTC](https://klipper.discourse.group/t/flashing-sd-card-not-working/792/5 "2025-08-02T12:21:36Z")

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