Yesterday, I have my opentherm gateway soldered and connected and everything works fine.
My next step is to put the generated data via PHP in a database (MySQL) from where I can created the graphs.
Before I go creating it myself, I am wondering if there might be someone who has already created a database model and some PHP code what I could use.
For example what I like to created (My site):
http://www.chamiri.nl/drupal7/