RTC Clock - tnl3pdx/SleepBud GitHub Wiki

Libraries that are used for RTC implementation:

• NTPClient
• ESP32 Wifi
• I2C RTC
• Wire (I2C)

Datasheet

• Datasheet

10/31/2024 (Truong)

I2C connection

• To calculate resistor for I2C pullup, used https://www.ti.com/lit/an/slva689/slva689.pdf?ts=1730373190625 as reference.
• For testing, used 5k for pullup

RTC interface

• DS3231 has a simple library called RTC (https://github.com/cvmanjoo/RTC)
• Allows for easy setup of time, date, and alarms.

11/8/2024 (Truong)

Parameters

• For integration, needed to have saved parameters that can be used to pick if the clock needed an update to the WiFi server.
• Used Parameters to save values such as time update, sleep time, and UTC offset for RTC.