温度传感器采用DALLAS公司继DS1820之后推出的一种改进型智能温度传感器DS18B20，其测温范围为-55至125摄氏度。分辨率最大可到0.0625摄氏度。可根据实际要求通过简单的编程实现9到12位的数字值读数，采用单线与单片机通信，减少了外部的硬件电路，具有易用和成本低的特点-Temperature Sensor DS1820 used DALLAS, following after the company introduced an improved version of the smart temperature sensor DS18B20, its temperature measurement range of-55 to 125 degrees. Maximum resolution to 0.0625 degrees. According to actual requirements to achieve through a simple programming 9-12 reading the digital value, using one-way and single-chip communications, a decrease of external hardware with easy-to-use and low cost