单总线上挂4路DS18B20温度传感器，采用轮流采集温度方式，送显1602液晶，包中有keil原工程以及Protues仿真图，以及source insight 工程-Single bus hanging temperature sensor DS18B20. 4, the take turns collection temperature way, gives show 1602 LCD, package has the original project and Protues keil sim