Add-on dossier

NFC e-paper image-transfer path

A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.

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Flutter & Friends 2025 E-Paper Conference Badge source-backed

badge update workflow

The companion package documents image transfer to the badge through NFC using a Type 4/NfcA tag workflow. This identifies the update surface without exposing a claim about any active radio or every event unit.

Badge: Flutter & Friends 2025 E-Paper Conference Badge
Type: badge update workflow
Status: source-backed
Compatibility: Flutter & Friends e-paper conference-badge target
Source: https://github.com/flutter-and-friends/friends_badge/blob/friends_badge-v0.1.4/docs/NFC_FORMAT.md

Badge context

Related Resources

conference-badge update protocol

NFC data format

Package documentation identifying the badge as an NFC Forum Type 4 tag using NfcA and documenting the passive image-transfer path. Generic active/Bluetooth material is kept separate from the 2025 event-unit assertion.

Badge: Flutter & Friends 2025 E-Paper Conference Badge

event-period companion package release

friends_badge v0.1.4 source

Versioned MIT-licensed Flutter package source that the organizer app locked during the 2025 event period; its description says it controls the Flutter & Friends e-ink conference badge and writes images to e-paper badges.

Badge: Flutter & Friends 2025 E-Paper Conference Badge

image-conversion documentation

Image data format

Package documentation for raw, uncompressed, column-major bitmap data sent to the badge after image conversion.

Badge: Flutter & Friends 2025 E-Paper Conference Badge

implemented target-profile source

BadgeSpecification source

The package's sole implemented target profile is `size3_7inchPassiveBWRY`: 240×416, passive, and black/white/yellow/red.

Badge: Flutter & Friends 2025 E-Paper Conference Badge

organizer-published conference-app commit

Flutter & Friends app Friends Badge feature commit

Dated August 30, 2025 source commit that adds the Friends Badge extra, Android/iOS NFC capability configuration, image-selection flow, e-paper conference-badge wording, and write-to-badge action in the organizer-published conference app.

Badge: Flutter & Friends 2025 E-Paper Conference Badge

organizer-published event schedule source

Flutter & Friends 2025 app schedule

Immutable conference-app schedule source encoding August 31-September 2, 2025 event activity in Stockholm and registration at Kulturhuset Stadsteatern.

Badge: Flutter & Friends 2025 E-Paper Conference Badge

participant-facing app interface

FriendsBadgePage source

Organizer-published page source for the Friends Badge editor: image selection, dither-kernel preview, and the NFC write action are exposed as a conference-app extra.

Badge: Flutter & Friends 2025 E-Paper Conference Badge

source license

friends_badge MIT license

MIT license for the companion-package source. It does not license event branding, a physical badge, original firmware, photographs, screenshots, or conference media.

Badge: Flutter & Friends 2025 E-Paper Conference Badge

Source trail