{"title":"Build a Transit Display","description":"\u003cp\u003eBuild a glanceable arrival board with NOTE4. This real-world example shows \u003cstrong\u003eTransitInk OS by Zerie55699\u003c\/strong\u003e displaying Hong Kong transit information.\u003c\/p\u003e\n\u003cp\u003eYou are buying the \u003cstrong\u003eNOTE4 Developer Kit\u003c\/strong\u003e hardware. The community project requires compatible firmware, configuration and local transit data; the pictured experience is not preinstalled.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/zectrix.com\/en\/developer.html#transitink-os\"\u003eExplore the project on ZECTRIX\u003c\/a\u003e · \u003ca href=\"https:\/\/github.com\/Zerie55699\/transitink-os\"\u003eProject by Zerie55699\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eCommunity feedback on NOTE4\u003c\/h3\u003e\n\u003cblockquote\u003e\n\u003cp\u003e“The device itself is very cool!”\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp\u003e— \u003ca href=\"https:\/\/x.com\/shantanugoel\/status\/2096939313317712242\"\u003eShantanu Goel (@shantanugoel)\u003c\/a\u003e, sharing his own NOTE4 agent-pager build. This feedback is about NOTE4 hardware, not TransitInk OS.\u003c\/p\u003e","products":[{"product_id":"note4-developer-kit","title":"NOTE4 Developer Kit","description":"\u003cp\u003e\u003cstrong\u003eComplete e-paper hardware. Open reference code. Build it your way.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNOTE4 Devkit is a fully assembled 4.2-inch black-and-white e-paper development device powered by ESP32-S3. It combines fast partial refresh, full-screen 16-level grayscale, wireless connectivity, controls, audio, NFC, battery power, and an enclosed desktop-ready form.\u003c\/p\u003e\n\u003ch2\u003eBuilt for e-paper development\u003c\/h2\u003e\n\u003cp\u003eUse NOTE4 Devkit to prototype dashboards, transit boards, learning tools, control surfaces, information terminals, and other low-power connected devices. The MIT-licensed reference project demonstrates full and partial 1-bit refresh together with full-screen 4bpp grayscale rendering.\u003c\/p\u003e\n\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 4.2-inch black-and-white e-paper, 400 × 300 pixels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eController:\u003c\/strong\u003e SSD2683\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRendering:\u003c\/strong\u003e Full and partial 1bpp refresh; full-screen 4bpp \/ 16-level grayscale\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcessor:\u003c\/strong\u003e ESP32-S3, dual-core Xtensa LX7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory:\u003c\/strong\u003e 16 MB Flash and 8 MB PSRAM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWireless:\u003c\/strong\u003e 2.4 GHz Wi-Fi and BLE 5.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 2,000+ mAh battery with USB Type-C charging and data\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware:\u003c\/strong\u003e Speaker, microphone, NFC, physical buttons, status light, magnetic back, and expansion interface\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 97 × 97 × 8.75 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIn the box:\u003c\/strong\u003e NOTE4 Devkit and one desktop stand\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDevelopment device notes\u003c\/h2\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eThese purchase links are exclusively for developer users.\u003c\/strong\u003e\u003cspan\u003e The Devkits are provided without any commitment or guarantee of software features. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNo commercial product warranty is offered for this development device. Hardware manufacturing defects may be eligible for support, subject to assessment and applicable law. Issues caused by flashing, custom firmware, modification, incompatible accessories, misuse, or expected e-paper behavior are assessed separately.\u003c\/em\u003e\u003c\/p\u003e","brand":"Zectrix Lab","offers":[{"title":"Default Title","offer_id":52204025184554,"sku":null,"price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7962\/1674\/files\/note4weather.jpg?v=1787746670"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7962\/1674\/collections\/note4-transit-display.jpg?v=1791787918","url":"https:\/\/shop.zectrixlab.com\/collections\/build-a-transit-display.oembed","provider":"Zectrix Lab","version":"1.0","type":"link"}