Quantity   Component name
1 × Hackaday.io Trinket Pro An ATmega328 that's easy to connect to a battery or power from USB.
1 × SparkFun Humidity and Temperature Sensor Breakout - HIH6130 The Honeywell HumidIcon Digital Humidity/Temperature Sensor HIH6130 is a digital output-type relative humidity (RH) and temperature sensor combined in the same package. This allows the RH measurement to be temperature compensated and provides a second, standalone temperature sensor output.
1 × SparkFun Altitude/Pressure Sensor Breakout - MPL3115A2 The MPL3115A2 is a MEMS pressure sensor that provides Altitude data to within 30cm (with oversampling enabled). The sensor outputs are digitized by a high resolution 24-bit ADC and transmitted over I2C, meaning it’s easy to interface with most controllers. Pressure output can be resolved with output in fractions of a Pascal, and Altitude can be resolved in fractions of a meter.
1 × SparkFun UV Sensor Breakout - ML8511 This sensor detects 280-390nm light most effectively. This is categorized as part of the UVB (burning rays) spectrum and most of the UVA (tanning rays) spectrum. It outputs a analog voltage that is linearly related to the measured UV intensity (mW/cm2).
1 × SparkFun OpenLog Power up this device and it will start logging any received serial data at 9600bps.
1 × Basic 16x2 Character OLED - Yellow on Black This is a basic 5V 16 character by 2 line OLED display with yellow text on a black background.
1 × Piezo Speaker - PC Mount 12mm 2.048kHz This is a small 12mm round speaker that operates around the audible 2kHz range.
1 × Altoids Tin Traditional project box with curiously strong mints.