Reimaging ssuboard-based machines

The 2018-2019 models of the Sintra, Sintra Forte, and Douro II are powered by the ssuboard, a computer with a removable microSD card for drive swaps, reimaging, and upgrades.

Use this article to create a microSD with the latest disk image for your cryptomat.

⚠️ ‎ NOTE: The latest disk image may not always contain the latest lamassu-machine release. Compare the below listed lamassu-machine release with those at our Server & Machine Updates section to see whether it could use a subsequent update.

Tools needed

• microSD to USB adapter (shipped with the machine or obtained separately)
• microSD card 16 GB or higher (either the cryptomat's existing card or a new one)
• Computer (Linux, Mac, or Windows)
• Keys to the cryptomat
• Access to the server / admin while at the cryptomat

Download the disk image

The latest disk images contain lamassu-machine v7.5.3:

For Sintra (without vault): ee-v7.5.3-ssuboard-sintra-2021.11.03.img.xz
sha256sum: ce1510b252f437a73f71ef34855e1aeec62a3cb888741ce7775dcc9e566a0466 

For Sintra Forte: ee-v7.5.3-ssuboard-sintraforte-2021.11.03.img.xz
sha256sum: 7a0a7adee5b40c32610226c5f0896532c49874a4a871cd04f431230ce6cf26fa

For Douro II (not the original Douro): ee-v7.5.3-ssuboard-douro2-2021.11.03.img.xz
sha256sum: d3970e7dae26e44c0fe4254811f50045c8af1c17ed410db0f9805e21cfa16693 

Do not unpack, unarchive, or mount the file on your computer after downloading.

Flash using Etcher 

Disconnect all external drives and devices connected to your computer, except for the destination microSD drive.

Download and install Etcher (available for Linux, Mac, and Windows): https://etcher.io/

In Etcher, select the image file downloaded earlier, then select the destination microSD drive, and click flash.

Replacing the drive

Unplug wall power from the cryptomat. To fully power down, proceed to unplug the battery pack following the appropriate article below:

• Sintra – Connecting the battery backup
• Sintra Forte – Connecting the battery backup

Locate the ssuboard enclosure and carefully press in on the existing microSD card in the slot underneath the red reset button, gently releasing to eject. It's small, so take care not to drop or lose it after ejecting.

Insert the new microSD card (labelled side facing to the right in the above photo) and push inwards until it clicks.

Booting the Sintra

Plug wall power back to the Sintra. Then, reconnect the battery power pack. Close the door.

The machine will boot to the first-run 'Congratulations' screen. Press the on-screen INIT button. Once on the 'Pairing' screen, use the '+ Add a Machine' panel in the admin to generate a new pairing code and pair with the machine.

‏‏⚠️ ‎ ‎IMPORTANT: Open the bottom cabinet now using your NFC key. The first NFC key that is presented to the machine is imprinted onto it as the authorised key. If you do not do this after booting from a new drive, someone with an NFC key could authorise theirs to open the machine's cabinet.

Updating the server

If this image flash represents an upgrade to your version release (for example, from Crafty Chnemu v7.3 to Defiant Dingirma v7.4), you will also need to update your server to the same version.

Head to our article on upgrading to the latest release, and follow the instructions for updating the server.

Afterwards, test transactions at the machine to ensure all performs as expected.