{"id":16239350,"url":"https://github.com/nopnop2002/esp-idf-pcf8563","last_synced_at":"2025-09-09T15:47:37.251Z","repository":{"id":108987845,"uuid":"197199164","full_name":"nopnop2002/esp-idf-pcf8563","owner":"nopnop2002","description":"PCF8563 RTC Driver for 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esp-idf-pcf8563\nPCF8563 RTC Driver for esp-idf\n\n# Installation\n```\ngit clone https://github.com/nopnop2002/esp-idf-pcf8563\ncd esp-idf-pcf8563\nidf.py menuconfig\nidf.py flash\n```\n\n# Wireing  \n\n|PCF8563||ESP32|ESP32S2/S3/H2|ESP32Cn|\n|:-:|:-:|:-:|:-:|:-:|\n|SCL|--|GPIO22|GPIO02|GPIO06|\n|SDA|--|GPIO21|GPIO01|GPIO05|\n|GND|--|GND|GND|GND|\n|VCC|--|3.3V|3.3V|3.3V|\n\nYou can change GPIO using menuconfig.   \n\n# Set Clock Mode   \n\nThis mode set RTC initial value using NTP time Server.   \nyou have to set these config value using menuconfig.   \n\n![config-pcf8563-1](https://user-images.githubusercontent.com/6020549/61298760-c38da700-a819-11e9-858c-a1ef2f03cf18.jpg)\n\n![config-pcf8563-2](https://user-images.githubusercontent.com/6020549/81560443-61b3b480-93cc-11ea-8763-c3d2bfab0fe3.jpg)\n\nyou have to set gpio \u0026 NTP Server using menuconfig.   \n\n![config-pcf8563-11](https://user-images.githubusercontent.com/6020549/61298824-de601b80-a819-11e9-8ccd-7d6b03fc3259.jpg)\n\n![config-pcf8563-12](https://user-images.githubusercontent.com/6020549/61298840-e3bd6600-a819-11e9-8bc2-1c36525bc2b6.jpg)\n\n\n# Get Clock Mode   \n\nThis mode take out the time from a RTC clock.   \nyou have to change mode using menuconfig.   \n\n![config-pcf8563-11](https://user-images.githubusercontent.com/6020549/61298824-de601b80-a819-11e9-8ccd-7d6b03fc3259.jpg)\n\n![config-pcf8563-13](https://user-images.githubusercontent.com/6020549/61298918-0d768d00-a81a-11e9-996a-a2660af4f665.jpg)\n\n![pcf8563-13](https://user-images.githubusercontent.com/6020549/61298923-10717d80-a81a-11e9-91c4-2136030eb2eb.jpg)\n\n\n# Get the time difference of NTP and RTC   \n\nThis mode get time over NTP, and take out the time from a RTC clock.   \nCalculate time difference of NTP and RTC.   \nyou have to change mode using menuconfig.   \n\n![config-pcf8563-11](https://user-images.githubusercontent.com/6020549/61298824-de601b80-a819-11e9-8ccd-7d6b03fc3259.jpg)\n\n![config-pcf8563-14](https://user-images.githubusercontent.com/6020549/61298984-35fe8700-a81a-11e9-80e0-7399fdbbff43.jpg)\n\n![pcf8563-14](https://user-images.githubusercontent.com/6020549/61298986-38f97780-a81a-11e9-99ab-6c4954373735.jpg)\n\n\n# Time difference of 1 week later.   \n\n![pcf8563-1week](https://user-images.githubusercontent.com/6020549/61800860-c5361b00-ae68-11e9-8b7d-ed64529f25fe.jpg)\n\n\n# Time difference of 1 month later.   \n\n![pcf8563-1month](https://user-images.githubusercontent.com/6020549/63231385-021de380-c256-11e9-9872-17ccc8a698b9.jpg)\n\n# Comparison with other RTCs\nThis module has a large time lag.   \nI recommend the DS3231 RTC.   \nhttps://github.com/nopnop2002/esp-idf-ds3231\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnopnop2002%2Fesp-idf-pcf8563","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fnopnop2002%2Fesp-idf-pcf8563","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnopnop2002%2Fesp-idf-pcf8563/lists"}