Software installation and configuration
All features of Iono Pi are controlled via dedicated GPIO pins, the I
2
C bus and the SPI
interface, and can be used with any operating system, programming language or
framework compatible with Raspberry Pi.
The following software installation notes are based on the Raspberry Pi OS (formerly
Raspbian) operating system.
Installing the Real Time Clock software
The RTC is based on the Microchip MCP79410 module and is connected to the Raspberry
Pi via its I
2
C serial bus.
Before downloading the installation utility, you should enable I
2
C and install the “i2c-tools”
package.
To enable I
2
C, run the “raspi-config” configuration utility:
$
sudo raspi-config
Then go to "Interfacing Options" (or "Advanced Options" on older Raspbian versions),
"I2C" and select "Yes" to enable the I
2
C interface.
To install the "i2c-tools" package:
$
sudo apt-get update
$
sudo apt-get install i2c-tools
With these prerequisite installs completed, you should download and run Iono Pi’s RTC
installation script:
$
cd
$
wget http://sferalabs.cc/files/strato/rtc-install
$
chmod 755 rtc-install
$
sudo ./rtc-install
If the script completes with no errors, delete the installation script and reboot:
$
rm rtc-install
$
sudo reboot
Testing the Real Time Clock
Assuming you are connected to the Internet and your Pi was able to reach a public NTP
(Network Time Protocol) server, you should see the current date and time using the “date”
command:
$
date
Thu Dec 10 18:02:32 CET 2015
Also check the date and time stored in the hardware clock:
$
sudo hwclock -r
Thu 10 Dec 2015 06:03:01 PM CET -0.546570 seconds
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Iono Pi User Guide
