esp_sensair/CHANGELOG.md

Changelog

All notable changes to this project are documented here. The format follows Keep a Changelog.

[Unreleased]

Added

• Photos (photos/): assembled-board photos (front/back, assembled and soldered), an active CO₂ measurement shot, and a Home Assistant dashboard screenshot. Committed to the tree, embedded in the README, and attached as assets to the v1.0.0 release.

[1.0.0] - 2026-10-19

First public release of the ESP32-C3 CO₂ & environment sensor board (prototype v1).

Added

• Hardware design (KiCad 10): schematic, 2-layer board layout, custom symbol library (esp_sensair_stuff.kicad_sym) and footprint library (esp_sensair_stuff.pretty/) for the ESP32-C3 module, Sensirion S8 and BME280.
• Project-local library tables (fp-lib-table, sym-lib-table) so the design opens with all custom parts resolved on a fresh clone.
• Fabrication data: Gerber X2 plot, Excellon PTH/NPTH drills, Gerber job/stackup file, packaged as a ready-to-upload esp-sensair.zip. These are derived artifacts published as release assets (not committed to the tree).
• Bill of materials (bom/esp-sensair-bom.csv) plus the human-readable BOM in the README.
• Documentation in docs/: schematic PDF, top/bottom layer plots, 3D render.
• Firmware (firmware/): ESPHome configuration and secrets templates (*.example) for the ESP32-C3 (esp-idf), BME280 over I²C and Sensirion S8 over UART, with Home Assistant API (noise encryption) and OTA.
• Licensing: CERN-OHL-S-2.0 for hardware (LICENSE), MIT for firmware, BOM and docs (LICENSE.MIT).
• .gitignore covering KiCad local history/backups/lock files, ESPHome build artifacts, live firmware credentials, and OS/editor noise.
• Documentation and repository tooling for this release (README, changelog, library tables, .gitignore, release packaging) drafted with OpenCode running the Qwen3.8 Flash Next model, reviewed by the maintainer.

Known issues

See the "Known issues and lessons learned (v1 → v2)" section of the README. Highlights: power delivered through the module's USB-C 5 V path, single decoupling capacitor, no mounting holes, no populated I²C pull-ups, unannotated schematic, and leaded HASL. (The + that was in the project name has been removed; the project and fabrication files are now esp-sensair.)