Download Web part from Git Hub
If you have a Raspberry PI, you can download a full image with everything installed.
Based on Raspbian, the user is 'pi' and passwords are always 'raspberry'.
Mdm related passwords are 'mdmpassword' and server key is '0000'
In order to write this image use a 4GB sd card and this software
Server url will be http://yourIP
After inserint the SD in your raspberry, go to http://yourip/phpMyAdmin/
and add the field name to the bbdd. Look for help at documents section
and update web part with 2.0.0. version
Download image 1.1.0 from here