{"id":17836861,"url":"https://github.com/mdaskalov/dcf77transmitter","last_synced_at":"2026-01-15T22:15:06.189Z","repository":{"id":220881806,"uuid":"752692492","full_name":"mdaskalov/DCF77Transmitter","owner":"mdaskalov","description":"DCF77 Transmitter for Tasmota using PWM","archived":false,"fork":false,"pushed_at":"2024-02-16T19:07:12.000Z","size":18,"stargazers_count":2,"open_issues_count":1,"forks_count":2,"subscribers_count":1,"default_branch":"main","last_synced_at":"2025-04-02T14:51:59.587Z","etag":null,"topics":["berry","dcf77","tapp","tasmota","timecode","transmitter"],"latest_commit_sha":null,"homepage":"","language":"Berry","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/mdaskalov.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}},"created_at":"2024-02-04T14:49:08.000Z","updated_at":"2025-01-22T12:38:31.000Z","dependencies_parsed_at":"2024-10-27T21:32:40.457Z","dependency_job_id":"31866a56-9b4f-468f-881a-3ef20444775e","html_url":"https://github.com/mdaskalov/DCF77Transmitter","commit_stats":null,"previous_names":["mdaskalov/dcf77transmitter"],"tags_count":3,"template":false,"template_full_name":null,"purl":"pkg:github/mdaskalov/DCF77Transmitter","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2FDCF77Transmitter","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2FDCF77Transmitter/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2FDCF77Transmitter/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2FDCF77Transmitter/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/mdaskalov","download_url":"https://codeload.github.com/mdaskalov/DCF77Transmitter/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2FDCF77Transmitter/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":28472624,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-01-15T22:13:38.078Z","status":"ssl_error","status_checked_at":"2026-01-15T22:12:11.737Z","response_time":62,"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":["berry","dcf77","tapp","tasmota","timecode","transmitter"],"created_at":"2024-10-27T20:44:05.828Z","updated_at":"2026-01-15T22:15:06.175Z","avatar_url":"https://github.com/mdaskalov.png","language":"Berry","funding_links":[],"categories":[],"sub_categories":[],"readme":"## General \n\nSimulates the [DCF77](https://en.wikipedia.org/wiki/DCF77) time code signal on a GPIO pin. It uses PWM with carrier frequency set to 25.833 kHz (third harmonic) as Tasmota limits the max PWM frequency to 50kHz (look for `PWM_MAX` in the source code). Also draws a digital clock on the dislplay if LVGL is supported.\n\n\n## Installation\nUpload the Tasmota appication `DCF77Transmitter.tapp` to the file system and reboot. The application run in the background and the transmitted data is written in the logs:\n\n```\nDCF: Sun 04.02.24 16:02 CET: 0-00000000000000-000101-00100001-0110101-001000-111-01000-001001001\n```\n\nTo build manually, execute following in the repo directory\n```\nrm -f DCF77Transmitter.tapp; zip -j -0 DCF77Transmitter.tapp src/*.be\n```\n## Configuration\nThe signal is submitted to the first configured PWM pin, check with: `gpio.pin(gpio.PWM1)` \n\nFollowing parameter could be configured in the `persist` module:\n\n`dcf77_offset` - integer (default: 60): Time offset of the transmitted time in seconds (by default next minute)\n\n`dcf77_dst` - boolean (default: false): By default the local time is submitted as CET. Set to `true` to submit it as CEST.\n\n## Antenna\nBest results are achieved if you connect a ferrite antenna over 330 ohm resistor and a capactior to ground.\n\nIt also works with analog beeper or even with a led connected to the GPIO pin. \n\nNormally the clock gets syncrhonized in about two minutes depending on the distance and signal strength.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmdaskalov%2Fdcf77transmitter","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmdaskalov%2Fdcf77transmitter","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmdaskalov%2Fdcf77transmitter/lists"}