Category Archives: Raspberry Pi

Raspberry Pi Chromium

The information below will help you setup a Raspberry Pi 2 or 3 to automatically load a predefined webpage in Chromium from boot with no user interaction.

Why:

Instead of using a costly full blown MS Windows desktop PC we can use a Raspberry Pi that not only costs hundreds of pounds less to buy but also consumes a minor percentage of power that a full desktop uses as well as being small enough to attach to the rear of the display device.

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Raspberry Pi Slideshow .PPT .PPTX .ODP

The information below will help you to setup a Raspberry Pi with Raspbian OS that will play a slideshow/PowerPoint presentation using a PPT/PPTX or ODP file.

The system will be setup to automatically login to a desktop, load Libre Office Impress (PowerPoint alternative) and run a slide show presentation with custom slide show settings defined.

Why:

Instead of using a costly full blown MS Windows desktop PC we can use a Raspberry Pi that not only costs hundreds of pounds less to buy but also consumes a minor percentage of power that a full desktop uses as well as being small enough to attach to the rear of the display device.

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Raspberry Pi Enable Cron

By default,  Cron is disabled meaning anything entered into  ‘crontab’ wont be run.

To enable this function, follow the steps below:

Once logged into the Pi use the below command to open up the ‘rsyslog.conf’ file in the Nano editor

cd/etc
sudo nano rsyslog.conf

Once the rsyslog is loaded into nano, navigate to the below section and un-comment the ‘cron’ option

#
# First some standard log files.  Log by facility.
#
auth,authpriv.*              /var/log/auth.log
*.*;auth,authpriv.none          -/var/log/syslog
cron.*                          /var/log/cron.log
daemon.*                        -/var/log/daemon.log
kern.*                          -/var/log/kern.log
lpr.*                           -/var/log/lpr.log
mail.*                          -/var/log/mail.log
user.*                          -/var/log/user.log

Save the document by pressing CTRL + O and then CTRL+X  close the editor.

Reboot the Raspberry Pi:

sudo reboot

Raspberry Pi Real Time Clock (RTC)

How to setup a Real Time Clock on a Raspberry Pi B v1.1

 

If you didn’t know, the Raspberry Pi doesn’t hold the time very well, this is because there is no on board Real Time Clock.

1pc-DS3231-Precision-RTC-Module-Memory-Module-for-Arduino-Raspberry-Pi-

To keep the devices time accurate we need to add a module that holds the time whenever the RPi has no power running to it and then updates the RPi with the time saved on the battery powered module when the full power is restored and the system starts running again.

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