https://github.com/nopnop2002/esp-idf-pcf8563

PCF8563 RTC Driver for esp-idf
https://github.com/nopnop2002/esp-idf-pcf8563

esp-idf esp32 pcf8563 rtc

Last synced: about 1 month ago
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PCF8563 RTC Driver for esp-idf

• Host: GitHub
• URL: https://github.com/nopnop2002/esp-idf-pcf8563
• Owner: nopnop2002
• Created: 2019-07-16T13:26:52.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2024-09-13T11:48:12.000Z (8 months ago)
• Last Synced: 2025-03-17T09:04:57.565Z (about 1 month ago)
• Topics: esp-idf, esp32, pcf8563, rtc
• Language: C
• Homepage:
• Size: 17.6 KB
• Stars: 11
• Watchers: 0
• Forks: 7
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# esp-idf-pcf8563

PCF8563 RTC Driver for esp-idf

# Installation

```

git clone https://github.com/nopnop2002/esp-idf-pcf8563

cd esp-idf-pcf8563

idf.py menuconfig

idf.py flash

```

# Wireing  

|PCF8563||ESP32|ESP32S2/S3/H2|ESP32Cn|

|:-:|:-:|:-:|:-:|:-:|

|SCL|--|GPIO22|GPIO02|GPIO06|

|SDA|--|GPIO21|GPIO01|GPIO05|

|GND|--|GND|GND|GND|

|VCC|--|3.3V|3.3V|3.3V|

You can change GPIO using menuconfig.   

# Set Clock Mode   

This mode set RTC initial value using NTP time Server.   

you have to set these config value using menuconfig.   

![config-pcf8563-1](https://user-images.githubusercontent.com/6020549/61298760-c38da700-a819-11e9-858c-a1ef2f03cf18.jpg)

![config-pcf8563-2](https://user-images.githubusercontent.com/6020549/81560443-61b3b480-93cc-11ea-8763-c3d2bfab0fe3.jpg)

you have to set gpio & NTP Server using menuconfig.   

![config-pcf8563-11](https://user-images.githubusercontent.com/6020549/61298824-de601b80-a819-11e9-8ccd-7d6b03fc3259.jpg)

![config-pcf8563-12](https://user-images.githubusercontent.com/6020549/61298840-e3bd6600-a819-11e9-8bc2-1c36525bc2b6.jpg)

# Get Clock Mode   

This mode take out the time from a RTC clock.   

you have to change mode using menuconfig.   

![config-pcf8563-11](https://user-images.githubusercontent.com/6020549/61298824-de601b80-a819-11e9-8ccd-7d6b03fc3259.jpg)

![config-pcf8563-13](https://user-images.githubusercontent.com/6020549/61298918-0d768d00-a81a-11e9-996a-a2660af4f665.jpg)

![pcf8563-13](https://user-images.githubusercontent.com/6020549/61298923-10717d80-a81a-11e9-91c4-2136030eb2eb.jpg)

# Get the time difference of NTP and RTC   

This mode get time over NTP, and take out the time from a RTC clock.   

Calculate time difference of NTP and RTC.   

you have to change mode using menuconfig.   

![config-pcf8563-11](https://user-images.githubusercontent.com/6020549/61298824-de601b80-a819-11e9-8ccd-7d6b03fc3259.jpg)

![config-pcf8563-14](https://user-images.githubusercontent.com/6020549/61298984-35fe8700-a81a-11e9-80e0-7399fdbbff43.jpg)

![pcf8563-14](https://user-images.githubusercontent.com/6020549/61298986-38f97780-a81a-11e9-99ab-6c4954373735.jpg)

# Time difference of 1 week later.   

![pcf8563-1week](https://user-images.githubusercontent.com/6020549/61800860-c5361b00-ae68-11e9-8b7d-ed64529f25fe.jpg)

# Time difference of 1 month later.   

![pcf8563-1month](https://user-images.githubusercontent.com/6020549/63231385-021de380-c256-11e9-9872-17ccc8a698b9.jpg)

# Comparison with other RTCs

This module has a large time lag.   

I recommend the DS3231 RTC.   

https://github.com/nopnop2002/esp-idf-ds3231