They also only implement serial sending (so the Arduino receives) so far, although they mention the next step would be to build the other side of the connection.

An Arduino Uno provides the processing power and drives the serial monitor. A joystick and a Hitachi H48C accelerometer are mounted on a breadboard and wired to the Uno.

Full instructions on how to build your very own DIY Arduino air pollution monitor have been kindly published to the Thingyverse website and can be accessed via the link below.

If you are a software and hardware developer working with serial ports, you often need a reliable serial port monitor that allows you to capture, display, analyze, record, and replay all serial port ...

He uses a cheap, $12 sensor with an Arduino and a Radiation shield and monitors the data on his computer.