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.

Use 1.0.4 — and do not use 1.0.5

The version to install is 1.0.4, dated 23 July 2026.

1.0.5 has a bug and must not be installed. It sits above 1.0.4 on the releases page, so it is what you get by taking the top of the list. Scroll past it.

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

• A 32 GB microSD card, Class 10, and a card reader on a computer
• Raspberry Pi Imager 1.9.4 — see below, the version matters
• The 1.0.4 image, about 950 MB compressed

Use Imager 1.9.4, not the current one

Raspberry Pi Imager 2.x rebuilt its interface, and the customisation step behaves differently there. Use 1.9.4, released 4 June 2025:

• Windows — imager-1.9.4.exe
• macOS — Raspberry.Pi.Imager-1.9.4.dmg
• Linux — Raspberry_Pi_Imager-1.9.4-x86_64.AppImage

The version is shown in the window title.

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. Open Edit Settings and check three values on the General tab. The image brings its own settings, so the fields arrive filled in — what matters is that they say this:

   • Hostname d1os. Imager remembers what it was given last time, so on a computer that has flashed a printer this can still read g1os. Left that way the dryer answers to the printer’s name, and on a network with a G1 on it two machines claim the same one
   • Username pi
   • Password raspberry. It has to be exactly this — the machine’s own services expect it

6. On the Services tab, enable SSH. Without it there is no way into the machine if anything needs looking at later

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

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

Reaching it afterwards

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

Related notes

• D1 specifications — what the machine is and how it connects
• D1 Dryer — setup and first assembly
• D1 Dryer — maintenance
• G1OS installation — the same job on the printer, which is a different image and a different hostname