Quantity   Component name
1 × Raspberry Pi Pick your version. This is being built on Raspbian Jessie
1 × SD Card At least 4GB, we're not using anything less than 8GB since we're gonna need storage
1 × BMP180 I2C Temperature and Pressure Sensor https://www.adafruit.com/products/1603 However, I'm now using an Ebay GY-80 or GY-87 board with a slew of additional I2C sensors on it
1 × 5V 2A USB power supply I've tested down to .7A power supplies with no real problem, but I'm also not using wireless or other power draws on the board