{"id":17836839,"url":"https://github.com/mdaskalov/esp32-dcf77-transmitter","last_synced_at":"2025-10-28T18:03:51.229Z","repository":{"id":215943802,"uuid":"739865341","full_name":"mdaskalov/esp32-dcf77-transmitter","owner":"mdaskalov","description":"DCF77 Transmitter for ESP32","archived":false,"fork":false,"pushed_at":"2024-02-11T13:56:38.000Z","size":26,"stargazers_count":3,"open_issues_count":0,"forks_count":1,"subscribers_count":1,"default_branch":"main","last_synced_at":"2025-03-29T17:41:31.521Z","etag":null,"topics":["dcf77","esp32","platformio"],"latest_commit_sha":null,"homepage":"","language":"C++","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":"2024-01-06T19:26:20.000Z","updated_at":"2024-11-26T05:51:15.000Z","dependencies_parsed_at":"2024-01-07T15:47:28.770Z","dependency_job_id":"aa46bb86-77e5-449b-b3d4-8c5c578c72ae","html_url":"https://github.com/mdaskalov/esp32-dcf77-transmitter","commit_stats":null,"previous_names":["mdaskalov/esp32-dcf77-transmitter"],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2Fesp32-dcf77-transmitter","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2Fesp32-dcf77-transmitter/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2Fesp32-dcf77-transmitter/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2Fesp32-dcf77-transmitter/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/mdaskalov","download_url":"https://codeload.github.com/mdaskalov/esp32-dcf77-transmitter/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":250301371,"owners_count":21408154,"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":["dcf77","esp32","platformio"],"created_at":"2024-10-27T20:44:03.047Z","updated_at":"2025-10-28T18:03:51.166Z","avatar_url":"https://github.com/mdaskalov.png","language":"C++","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 frequency set to 77.5 kHz to simulate the carrier signal. The time is synchronized using NTP server.\n\n## Installation\nConfigure your Wi-Fi credentials in the `defaults_override.ini` file. \n\nIf missing, the file will be created on the initial build (see `override_copy.py`). \n\nBy default generic ESP32 board (`esp32dev`) is used where only the `DCF77_GPIO` is configured. \n\nIt is also possible to show the time and the transmitted data on an attached display using the `TFT_eSPI` library. \n\nSelect one of the pre-configured environments in the `platformio.ini` or create one for your device.\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%2Fesp32-dcf77-transmitter","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmdaskalov%2Fesp32-dcf77-transmitter","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmdaskalov%2Fesp32-dcf77-transmitter/lists"}