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The Pico-RTC-DS3231 is an RTC expansion module specialized for Raspberry Pi Pico. It incorporates high precision RTC chip DS3231 and uses an I2C bus for communication. More external sensors are allowed to be connected thanks to the stackable design.
Please refer to Raspberry Pi's guide: https://www.raspberrypi.org/documentation/rp2040/getting-started/
1. Open a terminal of Raspberry Pi
2. Download and unzip the demo codes to directory Pico C/C++ SDK
#Note that the directory of SDK may be different for different users, you need to check the actual directory. Generally, it should be ~/pico/. wget -P ~/pico https://www.waveshare.com/w/upload/e/e8/Pico-rtc-ds3231.zip cd ~/pico unzip Pico-rtc-ds3231.zip
1. Hold the BOOTSEL button of Pico, and connect the USB interface of Pico to Raspberry Pi then release the button.
2. Compile and run the pico-rtc-ds3231 examples
cd ~/pico/pico-rtc-ds3231/c/build/ cmake .. make sudo mount /dev/sda1 /mnt/pico && sudo cp rtc.uf2 /mnt/pico/ && sudo sync && sudo umount /mnt/pico && sleep 2 && sudo minicom -b 115200 -o -D /dev/ttyACM0
3. Open a terminal and user minicom to check the sensor's information.
1. Refer to Raspberry Pi's guides to setup Micropython firmware for Pico
2. Open the Thonny IDE, and drag the demo to IDE and run on Pico as below.
3. Click the "run" icon to run the MicroPython demo codes.