Before diving into the driver, it is crucial to understand what the device is. The H21-USB is a 4-channel, weather-resistant data logger. Unlike simple USB thumb-drive loggers, the H21-USB uses a standard USB cable (Type B to Type A) to connect to a PC. It records data from Smart Sensors (temperature, relative humidity, 4-20 mA, etc.) and stores up to 1.5 million measurements.
– You might need to install Onset USB Driver (included in HOBOware installer, or request from Onset support).
: For Windows, the driver typically installs automatically the first time
