Datasheet

RTC with CircuitPython

Wiring

Wiring it up is easy, connect

GND to GND on your board

VCC to the logic level power of your board - every CircuitPython board uses 3.3V

SDA to the SDA i2c data pin

SCL to the SCL i2c clock pin

There are internal 10K pull-ups on the PCF8523 on SDA and SCL to the VCC voltage

Adafruit CircuitPython Library Install

To use the RTC sensor with your Adafruit CircuitPython board you'll need to install

the Adafruit_CircuitPython_PCF8523 module on your board.

First make sure you are running the latest version of Adafruit CircuitPython for your board.

Next you'll need to install the necessary libraries to use the hardware--carefully follow the steps to find and install these

libraries from Adafruit's CircuitPython library bundle. Our introduction guide has a great page on how to install the

library bundle for both express and non-express boards.

Remember for non-express boards like the, you'll need to manually install the necessary libraries from the bundle:

adafruit_bus_device folder

adafruit_register folder

adafruit_pcf8523.mpy

Before continuing make sure your board's lib folder or root filesystem has the adafruit_pcf8523.mpy module,

the adafruit_register folder, and the adafruit_bus_device folder copied over.