Do you have the Spark hooked up to one or more RJ11 temperature sensors, and if so then is it also hooked up to one or more actuators (a heating element, a freezer, etc) on the output side? Also, is the Spark connected via USB cable to the Raspberry Pi? And if so what do you see on the screen of the Spark unit? And have you visited the default web page of the RPi from a browser on the same LAN? The answers to these questions will help direct the help you get from the community.