Quantity   Component name
1 × RFM12 Wireless module Not the simplest, but by far the most versatile
1 × Trinket Pro 3v
1 × DHT11/22 Humidity Sensor Has built-in thermometer, but not too accurate
1 × BMP011 Pressure Sensor Accuracy is incredible, accurate altitude to within a few feet, so great for a weather station
1 × DS1820 Thermometers 12 bit precision, very accurate and low power