Abstract
In order to ensure food security, a design scheme about temperature and humidity data logger for small refrigerator that could monitor temperature and humidity of the environment in real time was proposed. The recorder uses 32-bit RX631designed by Company RENESAS as the controller chip and the paper will show the hardware and software of the product in detail and draw a conclusion. The recorder had a lot of advantages such as a larger range about temperature measurement, getting the information of temperature, humidity and working state whenever possible, even sending relevant information to users in time by GSM.
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