datawall_pi

Making a Datawall on the Pi

Datawalls can be constructed on the pi to be displayed on a screen, hosted locally or uploaded to an internet service such as email, reddit, etc.

Due to the limitations of the Raspberry Pi this can be a slow process, it's recommended to make datawalls via the GUI where possible. If it's taking a very long time check your log files aren't needlessly long and consider trimming if they are.

• Optimization of this script is on the TODO list

Making the Datawall

To construct a datawall locally you need to have a datawall module and the associated preset datawall preset. These can then be supplied to modular_datawall.py found in the ~/Pigrow/scripts/visualisations folder, note if writing your own modules and presets once they're working in the GUI ensure to copy them to the appropriate folders on the pi.

modular_datawall.py preset=selflog module=selflog 

Will read the required information, load the logs, create the graphs and assemble a selflog datawall which will be saved to ~/Pigrow/graphs/datawall.png

The outpath can be set using

out=/home/<USERNAME>/Pigrow/graphs/selflog_dw.png 

Note: Depending on the size of the logs, complexity of the datawall and version of the raspberry pi this may take some time to complete, if updating a display do not schedule datawall creation without checking each job will have time to complete before the next one tries to start - standard datawall modules are not intended as a live display.

Creating only graphs

The datawall script can be run without a datawall module supplied, in this case the graphs listed in the preset file will be created in the ~/Pigrow/graphs folder named datawall_graph_.png (this will be upgraded to improve graph naming soon)