เชื่อมต่อ RTC DS3231 กับ Raspberry Pi

Wiring RTC DS3231 with Raspberry Pi.
Following commands are used in video but I highly recommend to watch the whole clip and following the instruction neatly.
1. Initialization
sudo apt-get update
sudo apt-get install python-smbus
sudo apt-get install i2c-tools

2. Enabling the kernel interface
sudo raspi-config

3. Modify the module file
sudo nano /etc/modules
then add the following three lines:
i2c-bcm2708
i2c-dev
i2c-ds1307

4. Testing the i2c bus
sudo i2cdetect -y 1

5. Loading the driver when booting
sudo nano /boot/config.txt
add the following line:
dtoverlay=i2c-rtc,ds3231

6. Disabling the fake hardware clock
sudo apt-get -y remove fake-hwclock
sudo update-rc.d -f fake-hwclock remove

7. Starting the original hardware clock
sudo nano /lib/udev/hwclock-set
then commend the first three lines

8. Finallization
to test reading date-time from RTC:
sudo hwclock -r
to write the system time to RTC:
sudo hwclock -w
to set time from RTC to the system:
sudo hwclock -s

Music:
This Feeling - Atch https://soundcloud.com/atch-music

Видео เชื่อมต่อ RTC DS3231 กับ Raspberry Pi канала GeekSloth