Add-on dossier
Passive 240×416 four-color e-paper profile
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
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conference-badge update protocol
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
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
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
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
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
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
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
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
GitHub / Flutter & Friends · retrieved 2026-05-15
Primary source for the implemented 240×416 3.7-inch passive black/white/yellow/red e-paper target profile.
Badge: Flutter & Friends 2025 E-Paper Conference Badge
GitHub / Flutter & Friends · retrieved 2026-05-15
Organizer-published source establishing the August 31-September 2, 2025 schedule chronology, Stockholm context, and Kulturhuset registration location.
Badge: Flutter & Friends 2025 E-Paper Conference Badge
GitHub / Flutter & Friends · retrieved 2026-05-15
Primary source for the participant-facing Friends Badge interface, image selection, dither preview, and write-to-badge UI path.
Badge: Flutter & Friends 2025 E-Paper Conference Badge
GitHub / Flutter & Friends · retrieved 2026-05-15
Primary source for raw, uncompressed, column-major bitmap output from the companion package.
Badge: Flutter & Friends 2025 E-Paper Conference Badge
GitHub / Flutter & Friends · retrieved 2026-05-15
Primary source for the NFC Forum Type 4/NfcA description and passive image-transfer protocol. It does not prove physical component choice, final event configuration, or every attendee's use.
Badge: Flutter & Friends 2025 E-Paper Conference Badge
GitHub / Flutter & Friends · retrieved 2026-05-15
Primary organizer-published, dated August 30, 2025 source associating the public app's Friends Badge editor, NFC configuration, e-ink conference-badge language, and write action with the imminent 2025 event.
Badge: Flutter & Friends 2025 E-Paper Conference Badge
GitHub / Flutter & Friends · retrieved 2026-05-15
Primary MIT-license source for the public package code only; it does not establish image reuse, event media, or badge-hardware rights.
Badge: Flutter & Friends 2025 E-Paper Conference Badge
GitHub / Flutter & Friends · retrieved 2026-05-15
Primary versioned companion-package source explicitly describing control of the Flutter & Friends e-ink conference badge and image writing over NFC during the event period.
Badge: Flutter & Friends 2025 E-Paper Conference Badge