TASK 04

Flash & boot the software

Select the correct image, verify it, write microSD, and check the first boot.

You need

You’ll have

A verified microSD and a first-boot hardware checklist.

Choose a local build or upstream image

For our UR2 carrier, build with the previous workflow. Do not substitute the historical URT baseline hash for a new UR2 image.
The pinned upstream B13 Mini SD image is a convenient reference release; its stock reader setting is URT and still needs adaptation for this UR2 carrier.
Do not flash an SD .img as a NAND/eMMC update, or a Pro/Max/Pi image onto Mini.

For the exact B13 upstream file below, the expected SHA-256 is 0b6ae5c48c952b614e515c042e58b9b8527c3a8ff8e7a7894ffa9e6196ff4ebf.
For your own build, use its generated checksum manifest; its hash is expected to differ.
A checksum proves file identity. Verify release signatures/signer identity using the upstream guide; the public dev key does not establish exclusive trust.

macOS — hash the selected file

cd ~/Downloads
shasum -a 256 seedsigner-luckfox-pico-mini-sd-SeSi-0.8.7_ShSi-B13-osproduction-signed-devkey.img

Open balenaEtcher, choose Flash from file and select the .img.
Select the removable microSD by its capacity/name. Flashing erases that selected device; remove unrelated external drives first.
Flash and wait for verification to finish. Eject the card. If macOS offers to initialize an unfamiliar Linux partition, choose Ignore.

With power off, insert the card and connect the qualified LCD/camera/ribbon. Insulate module pins under the screen.
Use one regulated 5 V supply. Check screen, all eight keys and a harmless camera QR before testing cards.
Confirm System Info matches your image. A blank screen is a hardware/driver diagnostic, not permission to keep reflashing random images.

UR2 hardware needs /dev/ttyS2:SEC1210UR2 in the reader file. Keep the UART2 console disabled.
On a shell-enabled bench image, inspect the reader file and pcscd status. Production images may deliberately have no shell.
Secure-boot fuse provisioning is separate and irreversible; it is not a step in this first flash.

Inspect on a development image

cat /etc/reader.conf.d/sec1210
/etc/init.d/S60pcscd status

Sources & deeper reference

Checked 12 October 2026. Menu names can vary with firmware.