Introduction

This project describes a Raspberry Pi - time-lapse setup for the ARES beam line building project at DESY.

Installation:
git clone http://inetsrv.no-ip.org:3000/mwio/time-lapse_ARES_DESY.git

ARES project setup status

Part I:

Part II:

Raspberry Pi Setup:

Raspberry Pi ... Model
Raspberry Pi Gehäuse
Camera Module (standard version)
16GB Samsung Pro microSDHC I Karte

Installation des Betriebsystems auf dem Raspberry Pi:
Introduction: Installing operating system images on the Raspberry Pi

Playing audio Message - shell script

For this job we will use aplay. is a command-line soundfile recorder for the ALSA soundcard driver. It supports several file formats and multiple soundcards with multiple devices. Make a new file called "audio_message.sh" for example. This file will contain the following lines:

aplay /home/pi/Documents/ARES_TimeLapse/ARES_FotoText.wav

Taking a Photo - shell script

For this job we will use raspistill. raspistill is a command line tool for capturing still photographs with the camera module. Make a new file called "take_photo.sh" for example. This file will contain the following lines:

#!/bin/sh
raspistill -o /home/pi/Documents/ARES_TimeLapse/pic-`date +"%Y.%m.%d-%H:%M:%S"`.jpg -l /home/pi/Documents/Beamline-timeruffer/latest.jpg

Cronjob

Introduction: Crontab Syntax und Tutorial in Linux

Crontab Syntax:
◦ ◦ ◦ ◦ ◦ auszuführender Befehl
┬ ┬ ┬ ┬ ┬
│ │ │ │ │
│ │ │ │ └──── Wochentag (0-7, Sonntag ist 0 oder 7)
│ │ │ └────── Monat (1-12)
│ │ └──────── Tag (1-31)
│ └────────── Stunde (0-23)
└──────────── Minute (0-59)

1) Used code for the ARES-time-lapse-crontab - Playing audio Message:
59 14 * * * /time-lapse_ARES_DESY/src/audio_message.sh
Jeden Tag um 14:59 Uhr wird das Audiofile "audio_message.sh" abgespielt.

2) Used code for the ARES-time-lapse-crontab - Taking a photo:
* 15 * * * /time-lapse_ARES_DESY/src/take_photo.sh
Jeden Tag um 15:00 Uhr, wird die Datei "take_photo.sh" abgespielt, um ein Foto zu schießen.

List active Crontab(s)
~ crontab -l

Remove active Crontab(s)
~ crontab -r

ToDo's

Add the right Cronjob file and description.