Raspberry Pi PiCoolFAN4 User Manual page 23

PiCoolFAN4
In order to make the HW RTC installed follow the below procedure step by step.
1. Ensure to run below line
sudo apt-get -y install i2c-tools
2. Edit by running the following line
sudo nano /etc/modules
and check, make sure to have the following items in the file and add what is missing:
i2c-bcm2708
i2c-dev
rtc-ds1307
3. Edit by running the following line
sudo nano /boot/config.txt
4. and add the following to this file:
enable_uart=1
dtoverlay=i2c-rtc,ds1307
5. Edit by running the following line
sudo nano /etc/rc.local
6. and add the following line before "exit 0"
sleep 4; hwclock -s &
7. Reboot system by
sudo reboot
8. Remove the fake-hwclock which interferes with the RTC hwclock
sudo apt-get -y remove fake-hwclock
sudo update-rc.d -f fake-hwclock remove
9. Run
sudo nano /lib/udev/hwclock-set
10. and comment out these three lines:
Designed by www.pimodules.com
Firmware Code 0x14
manufactured in co-operation with
Print Date 10.11.2019
www.thepihut.com