wiki

l use HOBO data loggers to monitor temperature and humidity and log each at 30-second intervals. It saves the readings so that I can read the via a Bluetooth wireless connection with the HOBOconnect app on my mobile phone.

The data logger is in a solar radiation shield to reduce heating of the sensor from direct sunlight.

I pay attention to the high and low temperatures, the average high temperature and the average low temperature, and summarize by month. During season changes I evaluate the temperature readings to make decisions about when to sow or transplant, or to arrange for cover material to protect the plants. Such information serves well in a new season or at the end of a season.