Single-bus multi-point temperature measurement system, a single bus, it uses a single transmission clock signal lines also transmit both data and data transmission is a two-way it has to save I/O port line resources to facilitate simple structure and low-cost expansion and maintenance of the bus and many other advantages of . All the DS18B20 this system are connected to the P1.1 port on the microcontroller. With an LCD screen display, from the microcontroller port connected to the eight switches P3, with the right DS18B20 numbers correspond to. When there is no switch is pressed, the screen displays " which NO you want press which key" , To Look at 1:00 at the temperature of the press a few keys, No.

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