Camera Module take pictures every 30 sec to SD card

Question

I have the camera module for the raspberry pi. I need to know, how do I program the pi to take an image every 30 seconds and save the images to the inserted 64gb SD card.

Answer 1

You could just use the raspistill's built in timelapse option:

raspistill -t 30000 -tl 2000 -o image%04d.jpg

That will take a picture every 2 seconds over a total period of 30 seconds with the files named image1.jpg, image0002.jpg...image0015.jpg. The %04d will be changed into a four-digit number with leading zeros added. I.e. %08d would give you an eight-digit number.

Answer 2

One way is to create a bash script and cron job.

Create a bash script inside /home/pi directory using your favourite text editor and name it takephoto.sh for example.

#!/bin/bash
DATE=$(date +"%Y-%m-%d_%H%M")
raspistill -o /home/pi/stills/$DATE.jpg

Then when you saved it you need to set the execute flag on the file with the following command.

chmod +x takephoto.sh

Create a directory, like /home/pi/stills, the same as in the bash script. Now from /home/pi you can test the script by executing it using ./takephoto.sh

You should have an image created inside the still folder with the timestamp.

Now you can setup a cron job to execute the script with the interval you require.