{"id":51277096,"url":"https://github.com/noot/xiao-epaper","last_synced_at":"2026-06-29T21:32:34.842Z","repository":{"id":365844086,"uuid":"1274024349","full_name":"noot/xiao-epaper","owner":"noot","description":"rust firmware lib for seeed xiao 7.5\" epaper","archived":false,"fork":false,"pushed_at":"2026-06-19T06:12:56.000Z","size":1576,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"master","last_synced_at":"2026-06-19T07:24:50.301Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":"","language":"Rust","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/noot.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2026-06-19T05:34:08.000Z","updated_at":"2026-06-19T06:13:00.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/noot/xiao-epaper","commit_stats":null,"previous_names":["noot/xiao-epaper"],"tags_count":null,"template":false,"template_full_name":null,"purl":"pkg:github/noot/xiao-epaper","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/noot%2Fxiao-epaper","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/noot%2Fxiao-epaper/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/noot%2Fxiao-epaper/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/noot%2Fxiao-epaper/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/noot","download_url":"https://codeload.github.com/noot/xiao-epaper/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/noot%2Fxiao-epaper/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":34944147,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-06-29T02:00:05.398Z","response_time":58,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2026-06-29T21:32:34.719Z","updated_at":"2026-06-29T21:32:34.837Z","avatar_url":"https://github.com/noot.png","language":"Rust","funding_links":[],"categories":[],"sub_categories":[],"readme":"# xiao-epaper\n\nRust `no_std` firmware for the [Seeed Studio XIAO 7.5\" ePaper Panel](https://www.seeedstudio.com/XIAO-7-5-ePaper-Panel-p-6416.html).\n\nUC8179 display driver and example firmwares for the 800x480 e-ink display, using `esp-hal` and `embedded-graphics`.\n\n## Hardware\n\n- **MCU:** ESP32-C3 (RISC-V, 160 MHz) via the XIAO ESP32-C3 module\n- **Display:** 7.5\" e-ink, 800x480, UC8179 (GD7965) controller\n- **Interface:** SPI (SCK=GPIO8, MOSI=GPIO10, CS=GPIO3, DC=GPIO5, RST=GPIO2, BUSY=GPIO4)\n\n## Prerequisites\n\nInstall the Rust toolchain, `espflash`, and `just`:\n\n```sh\nrustup target add riscv32imc-unknown-none-elf\ncargo install espflash\ncargo install just\n```\n\n## Setup\n\n```sh\ncp .env.example .env\n# edit .env with your wifi credentials and server IP\n```\n\n## Examples\n\nConnect the XIAO panel via USB-C. All examples flash the firmware and open a serial monitor.\n\n### demo\n\nDraws text, shapes, and a checkerboard pattern.\n\n```sh\njust demo\n```\n\n### png\n\nRenders a PNG image from `assets/image.png`. The build script converts it to 1bpp with Floyd-Steinberg dithering at compile time.\n\n```sh\njust png\n```\n\n### fetch\n\nConnects to wifi, fetches a pre-rendered framebuffer from the image server, and displays it. Partial refresh every minute, full refresh every 5 minutes to clear ghosting. Requires `SSID`, `PASSWORD`, and `SERVER_URL` in `.env`.\n\n```sh\njust server   # in one terminal\njust fetch    # in another\n```\n\n## Image Server\n\nA standalone axum server that converts a PNG to a 1bpp framebuffer and serves it over HTTP.\n\n```sh\njust server                        # serves assets/image.png\njust server ~/Pictures/photo.png   # serves a specific image\n```\n\nListens on `0.0.0.0:3000` by default. Set `PORT` in `.env` to change it (and update `SERVER_URL` to match). The firmware fetches from `GET /framebuffer`.\n\n## Troubleshooting\n\n- **Device not found:** make sure the USB-C cable supports data (not charge-only). Try holding the BOOT button while plugging in to enter bootloader mode.\n- **Display doesn't refresh:** the UC8179 init sequence may need adjustment. Check the busy pin timeout in `src/uc8179.rs`.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnoot%2Fxiao-epaper","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fnoot%2Fxiao-epaper","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnoot%2Fxiao-epaper/lists"}