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UID:pretalx-coscup-2026-FJ7YKS@pretalx.coscup.org
DTSTART;TZID=CST:20260809T105000
DTEND;TZID=CST:20260809T112000
DESCRIPTION:Consumer IoT devices\, such as digital photo frames\, often rel
 y on heavy operating systems (like Android) and touchscreens just to handl
 e basic setups like Wi-Fi and API configurations. This approach not only c
 omplicates the hardware design but also limits the device's lifespan—onc
 e OS updates stop\, the device often becomes obsolete or a security risk.\
 n\n"Tac Photo" is an open-source digital photo frame project that takes a 
 different approach. By using an ESP32-S3 running FreeRTOS instead of a hea
 vy OS\, the device remains lightweight and functional over the long term w
 ithout requiring frequent software updates.\n\nTo configure the device wit
 hout a screen\, we separated the setup process from the hardware itself. U
 sers configure their settings (Wi-Fi credentials\, cloud sync) on a smartp
 hone app\, which encrypts and writes this data to a standard passive NFC c
 ard. Tapping this physical card to the frame updates its state instantly.\
 n\nIn this session\, I will share the architecture and practical lessons l
 earned from building this system. Participants will explore:\n\n1. Hardwar
 e-Software Integration: Using standard NFC to shift complex UI tasks to a 
 smartphone\, leaving the hardware simple\, single-purposed\, and easy to m
 aintain.\n\n2. Headless Cloud Connections: How to securely transfer encryp
 ted OAuth refresh tokens via NFC to connect to cloud services (like Google
  Photos) without a device-side browser.\n\n3. Longevity & Right to Repair:
  How choosing an RTOS over a full OS\, combined with a minimalist\, open h
 ardware design\, aligns with the Right to Repair movement\, empowering use
 rs to customize and fix their own digital appliances.\n\nThis talk provide
 s a practical framework for developers looking to build simple\, repairabl
 e\, and long-lasting IoT devices using FOSS tools.
DTSTAMP:20260713T132624Z
LOCATION:TR515
SUMMARY:Tangible Interfaces in Open Hardware: The "Calm Tech" Approach to I
 oT Configuration - Masaya Narita\, Kota Mizutani
URL:https://pretalx.coscup.org/coscup-2026/talk/FJ7YKS/
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