Other people have given you this advice already: Play around with an arduino for a while until you get comfortable with the hardware/software interface. If you'

Other people have given you this advice already: Play around with an arduino for a while until you get comfortable with the hardware/software interface. If you're looking to incorporate sensors, get a few breakout boards from sparkfun (doesn't really matter what sensors) - one that you read as a voltage level from the ADC (analog to digital converter), and one that uses I2C, SPI, or another serial interface. On the Bluetooth LE side, you CAN get a shield that sits on top of your Arduino, but it'll be bulky and power hungry. There's a company called Bluegiga that makes a BLE stack called the BLE112. Basically, it's an arduino and a BLE module in a package the size of a postage stamp. Not something you'd want to go into production with (doesn't get much below $15, regardless of quantity), but you can run it off of a coin cell battery for years, and it's got all the serial and analog interfaces you'd expect. You can get a breakout board for around $50 assembled - google 'ble112 breakout inmojo'. Good luck! Build cool stuff.