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Flashing the D1 SD card

The D1 runs its own operating system, DryerOS, on a Raspberry Pi behind the control panel. This is how to put it back on the card.

When you need this

Section titled “When you need this”
  • The panel does not reach its Home screen — it hangs at boot or shows an error
  • The card is confirmed corrupted, or the machine has been unresponsive since a power cut
  • Ginger Additive support asks you to

It is not the answer to a dryer that heats oddly or feeds badly. Those are the machine, not the card — see D1 Dryer — maintenance.

What you need

Section titled “What you need”
  • A microSD card reader on a computer
  • Raspberry Pi Imager — raspberrypi.com/software
  • The 1.0.4 image, about 950 MB compressed

  1. Take the card out. It is in the Raspberry Pi behind the D1’s screen. Machine off and unplugged before you open anything

  2. Download the image. From the D1-OS releases page, take the .img.xz:

    2026-07-23-DryerOS-raspberry_pi-arm64-bookworm-1.0.4.img.xz

    There is a matching .sha256 file beside it if you want to check the download arrived intact. Do not unpack it — Raspberry Pi Imager reads .img.xz as it is

  3. Open Raspberry Pi Imager and choose the image by hand. Under Choose OS, scroll to the bottom of the list and pick Use custom, then select the file you downloaded.

    DryerOS is not in the built-in list. Use custom is the only route

  4. Choose the SD card under Choose Storage

  5. Check the hostname reads d1os in Edit Settings. The image brings its own settings, so there is nothing to fill in — but Raspberry Pi Imager remembers what it was given last time, and on a computer that has flashed a printer the field can still say g1os. Left that way the dryer comes up answering to the printer’s name, and on a network with a G1 on it two machines claim the same one

  6. Write the card, then put it back in the Raspberry Pi and reassemble

  7. Power on and check the panel reaches its Home screen

Reaching it afterwards

Section titled “Reaching it afterwards”

The dryer comes up at d1os.local. Open that in a browser on the same network — see D1 specifications.

Section titled “Related notes”