Additional Feature Setup; Hw Real Time Clock - Raspberry Pi PiCoolFAN4 User Manual

PiCoolFAN4 Firmware Code 0x14 Print Date 10.11.2019

Additional Feature Setup

HW Real Time Clock

As it has been mentioned above there is no need to do anything in software installation for the basic
operation of the PiCoolFAN4. However this small PCB is equipped with plenty of additional features, that;
if used, user can benefits of their advantages. The most frequently used is the Hardware Battery Backed
Real Time Clock. Follow below description in order to make it easy used on your system.
After plug-in the PiCoolFAN4 and start the Raspberry Pi, you can see existing the following addresses on
2
the I C space simply by typing the following command:
sudo i2cdetect -y 1
If an RTC has been installed previously the address 0x68 will be visible as UU, or if it is the first installation
it will be visible as 68. In addition the other visible address will be the 60 (0x60) that is the basic address
where Raspberry Pi is interacting with the PiCoolFAN4. The address 0x60 could be different if other
alternative firmware has been loaded. The available addresses are : 0x30, 0x40, and 0x50. Please kindly
notice that these addresses if used are part of Advanced Installation procedures.
In order to use HW RTC user will need to fit-in a coin backup battery CR1220 or CR1225. It is 3V Lithium
battery. User can use any other locally ordered similar batteries, however as we and all distributors are
selecting always the best parts therefore we suggest to buy from them directly when buying the
PiCoolFAN4.
Then, after coin battery installation it is needed to follow the standard HW RTC installation. The used IC
is the DS1307, here below is described a sample installation of it.
Please kindly notice that functionality of Hardware RTC is independent of any other functionalities of
PiCoolFAN4.
Designed by www.pimodules.com manufactured in co-operation with www.thepihut.com