PICO RTC DS3231 User Manual

Windows
Download and unzip the demo (https://files.waveshare.com/upload/2/26/Pico-rtc-ds323
1_code.zip) to your Windows desktop, refer to Raspberry Pi's guides to set up the
Windows software environment settings.
Press and hold the BOOTSEL button of Pico, connect the USB of Pico to the PC with a
MicroUSB cable. Import c or python program into Pico to make it run.
Use the serial tool to view the virtual serial port of Pico's USB enumeration to check the
print information, the DTR needs to be opened, the baud rate is 115200, as shown in the
picture below:

PICO RTC DS3231 Specifications

General

Chip	DS3231
Interface	I2C
Operating Voltage	2.3V to 5.5V
Temperature Range	-40°C to +85°C
Battery	CR2032
Battery Backup	Yes
Battery Voltage	3V
RTC Clock Frequency	32.768 kHz
Type	Real-Time Clock
Accuracy	±2ppm from 0°C to +40°C, ±3.5ppm from -40°C to +85°C
Alarms	Two programmable alarms
Square Wave Output	1 Hz