It is no secret that making sure that you data is flowing is biggest concern for reliable statistics (and pretty pictures). Fortunately systemd now available on all popular Linux distributions so we do not have to write much.
Now that we have Raspberry Pi 2 Model B, Aeotec Z-Stick and Aeotec Z-Wave Home Energy Meters it is time to get the talking to each other. Pairing Aeotec Z-Stick and Aeotec Z-Wave Home Energy Meters is a no-brainer, just follow instructions in the box. Getting RaspberryPi effectively communicating to Aeotec Z-Stick is a bit less trivial.
If you look at Laravel 5.2, you'll find that it has Middleware called "throttle". This particular middleware is capable of limiting requests and works using internal cache system.