{"id":31523272,"url":"https://github.com/romkey/sensortech","last_synced_at":"2026-04-20T13:38:43.259Z","repository":{"id":313667841,"uuid":"1039158085","full_name":"romkey/sensortech","owner":"romkey","description":"Code and documents for CETI Institute sensor and microcontroller workshops","archived":false,"fork":false,"pushed_at":"2025-09-07T16:55:24.000Z","size":16952,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2025-10-03T16:25:51.026Z","etag":null,"topics":["circuitpython","home-assistant","iot","sensors","zigbee"],"latest_commit_sha":null,"homepage":"https://romkey.com/","language":null,"has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/romkey.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"MIT-LICENSE.txt","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":"2025-08-16T15:51:29.000Z","updated_at":"2025-09-12T18:51:17.000Z","dependencies_parsed_at":"2025-09-07T18:51:06.078Z","dependency_job_id":null,"html_url":"https://github.com/romkey/sensortech","commit_stats":null,"previous_names":["romkey/sensortech"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/romkey/sensortech","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/romkey%2Fsensortech","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/romkey%2Fsensortech/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/romkey%2Fsensortech/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/romkey%2Fsensortech/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/romkey","download_url":"https://codeload.github.com/romkey/sensortech/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/romkey%2Fsensortech/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":32049334,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-04-20T11:35:06.609Z","status":"ssl_error","status_checked_at":"2026-04-20T11:34:48.899Z","response_time":94,"last_error":"SSL_connect returned=1 errno=0 peeraddr=140.82.121.6:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"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":["circuitpython","home-assistant","iot","sensors","zigbee"],"created_at":"2025-10-03T16:13:50.540Z","updated_at":"2026-04-20T13:38:43.252Z","avatar_url":"https://github.com/romkey.png","language":null,"funding_links":[],"categories":[],"sub_categories":[],"readme":"# CETI Institute Sensor Tech Workshop Notes\n\nThis repo contains the slides for two workshops I recently held at [CETI Institute](http://ceti.institute) in Portland, Oregon. It also includes code for a demo.\n\nThe first workshop - [SensorTech](presentations/Sensortech.pdf) - covers broad concepts in sensors - kinds of sensors, things you need to think about, how to prioritize. And ends with a discussions of a sensor I dislike (eCO2 - \"equivalent CO2\", which guesses how  much CO2 there might be in a space) and a sensor I do like (\"Nuclear Event Detector\").\n\nThe second workshop - [Assisted Assisted Living](presentations/Assisted%20Assisted%20Living.pdf) covers a project for monitoring an asissted living space using Home Assistant and Zigbee-based sensors.\n\n## Code\n\nThe [demo](demo/) is written in [CircuitPython](https://circuitpython.org). Run it by  copying the files to a CircuitPython device and restarting it (or use [circremote](https://github.com/romkey/circremote). \n\nYou'll want to connect a true CO2 sensor - the SCD40 or SCD41 - and an \"equivalent CO2\" sensor - CCS811 or ENS160. The code will show live graph of both sensors. Try exposing them to various gasses - especially actual pure CO2 (a SodaStream CO2 cartridge is useful for this) or alcohol - and you'll see how wildly the eCO2 sensor can vary from a true CO2 sensor.\n\n## License\n\nPresentations are licensed [CC BY-NC 4.0](CC-BY-NC-4.0.txt), [Creative Commons Attribution-NonCommercial 4.0 International](https://creativecommons.org/licenses/by-nc/4.0/) by John Romkey, 2025.\n\nThe code is licensed under the [MIT License](MIT-LICENSE.txt).\n\nDatasheets are owned and licensed by the companies that published them.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fromkey%2Fsensortech","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fromkey%2Fsensortech","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fromkey%2Fsensortech/lists"}