{"id":15132830,"url":"https://github.com/sixline/picoeca","last_synced_at":"2026-02-04T17:32:09.292Z","repository":{"id":251425111,"uuid":"837404723","full_name":"Sixline/PicoECA","owner":"Sixline","description":"Raspberry Pi Pico/RP2040 project to read Ethanol % and temperature from a GM flex fuel sensor and transmit via CANBUS.","archived":false,"fork":false,"pushed_at":"2024-08-03T00:32:41.000Z","size":2340,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2025-04-05T21:45:03.002Z","etag":null,"topics":["canbus","ethanol","flex","flexfuel","fuel","pico","raspberry-pi","rp2040"],"latest_commit_sha":null,"homepage":"","language":"C","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"gpl-3.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/Sixline.png","metadata":{"files":{"readme":"README.MD","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","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}},"created_at":"2024-08-02T22:41:09.000Z","updated_at":"2024-08-03T00:32:44.000Z","dependencies_parsed_at":"2024-12-19T04:32:09.395Z","dependency_job_id":"c839b431-f63b-44ef-85ec-ec1cf19936c4","html_url":"https://github.com/Sixline/PicoECA","commit_stats":{"total_commits":3,"total_committers":1,"mean_commits":3.0,"dds":0.0,"last_synced_commit":"edd2c7ddb5a39b79015f0fff0255d63e2c89ef01"},"previous_names":["sixline/picoeca"],"tags_count":1,"template":false,"template_full_name":"Sixline/PicoECA-temp","purl":"pkg:github/Sixline/PicoECA","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Sixline%2FPicoECA","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Sixline%2FPicoECA/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Sixline%2FPicoECA/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Sixline%2FPicoECA/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/Sixline","download_url":"https://codeload.github.com/Sixline/PicoECA/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Sixline%2FPicoECA/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":262893665,"owners_count":23380712,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","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":["canbus","ethanol","flex","flexfuel","fuel","pico","raspberry-pi","rp2040"],"created_at":"2024-09-26T04:40:39.320Z","updated_at":"2026-02-04T17:32:09.263Z","avatar_url":"https://github.com/Sixline.png","language":"C","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Pico Ethanol Content Analyzer - Raspberry Pi Pico/RP2040\n\nThis will read the frequency(Ethanol %) and low pulse time(C Temp) of a standard GM Ethanol content sensor, print it to USB serial, and then transmit a CANBUS message.\n\nUses the PIO for CANBUS, using this library: https://github.com/KevinOConnor/can2040\n\nCANBUS message format can be set to whatever. Default is set to mirror the Zeitronix format. It will transmit 50% Ethanol, max temperature, and a faulted sensor state for any error condition. The error conditions being a disconnected or failed sensor, too low of a frequency(below 0%), and too high of a frequency(above 100%).\n\n![Wiring Diagram.png](https://github.com/Sixline/PicoECA/blob/31fcc2172cd30a571ddddda284e793472f792b68/Wiring%20Diagram.png)\n\nTested with:\n* VDO / CONTINENTAL SE1004S or GM 13577429. Connector for the sensor is a Delphi 13511132. Cheap connectors on AliExpress work great.\n* Texas Instruments SN65HVD230 CANBUS transceiver. Again, cheap breakout boards on AliExpress. Depending on your application you may not may not need a 120 Ohm termination resistor. The boards I bought from AliExpress included them.\n* QS-1205CME-3A buck converter, from AliExpress, to step down the vehicle 12V to 5V needed for the Pico.\n\nTotal cost was around $100.\n\n![Completed Module.png](https://github.com/Sixline/PicoECA/blob/31fcc2172cd30a571ddddda284e793472f792b68/Completed%20Module.png)\n\n```\nOutput Ethanol Content: % (Frequency Hz - 50)\nFuel temperature °C: [41.5 x low pulsewidth (ms)] - 81.25\nSelf diagnostics: Embedded (fuel contamination more likely as readings increase above 150Hz)\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsixline%2Fpicoeca","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsixline%2Fpicoeca","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsixline%2Fpicoeca/lists"}