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Flashing the firmware

The box runs from its memory card. You write our firmware image to the card once; after that, updates arrive over Wi-Fi from the box's setup page.

What you need

  • The firmware image, netstalgia-0.9.1-sdcard.img.xz (or newer), from Downloads. Use 0.8.9 or later: from that version the box sets itself up on its first start.
  • A microSD card of 2 GB or more. Everything on it will be erased.
  • An image writer for your computer, such as balenaEtcher, or Raspberry Pi Imager with Use custom. Both read the .xz file directly: there is no need to unpack it.

Check the download

Before you flash, make sure the file arrived whole. Its SHA-256 checksum must match the one shown next to it on the Downloads page.

Your computerType this
Windowscertutil -hashfile netstalgia-0.9.1-sdcard.img.xz SHA256
macOSshasum -a 256 netstalgia-0.9.1-sdcard.img.xz
Linuxsha256sum netstalgia-0.9.1-sdcard.img.xz

If the numbers differ, download the file again. Don't flash an image whose checksum doesn't match.

Write the card

  1. Put the microSD card in your computer's card reader.
  2. Start the image writer and choose the .xz file. (In Raspberry Pi Imager: Choose OS, then Use custom.)
  3. Choose the memory card. Check twice that it is the card and not one of your computer's disks.
  4. Write it, and wait for the writer to check the card afterwards.
  5. Eject the card and put it in the Pi.

The image holds no passwords, keys or Wi-Fi settings: every box makes its own on its first start.

Next: first-time setup.

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