For a short development period and low development cost, a temperature and humidity measuring device with high precise and storage performance in greenhouse is developed by proteus software,.

In order to obtain higher measurement accuracy and less uncertainty during the nano scale resolution measurement, the demands on the environment measurement and control, such as air pressure, humidity, temperature, vibration and so on, should be met, specially stricter for the temperature and humidity measurement and control in the ultra high precision nanometer measurement.

This article describes how to design and implement temperature and humidity measurement systems based on PSOC chip and USB communication.