程序描述：网络远端温度感测器，这个范例中使用到　

（1）8051 的Port 1连接到LCD显示器，PORT 3的P3.3、P3.4和P3.5分别连接到LCD显示器的控制线，程序执行时可以让LCD显示器显示出时间和日期。

（2）温度感测组件AD590经由ADC0804将感测到的温度，转换成数位数据，然后经由PORT 0输入8051。

（3）igangcai 8051的第10和第11只脚RXD和TXD分别连线到MAX232，然后连接到PC的COM埠。

　(4) 当PC端经由RS232传送S时，接下来PC送出的下　个byte就用来设定PORT 3的输出。

　(5) 当PC端经由RS232传送T时，接下来PC连续送出五个bytes，这五个bytes是 "年月日时分"，这是 PC 用来设定实验板的时间日期。

　(6) 8051每　分钟就读入ADC0804转换的数字温度数据，然后通过RS232传送给PC端，再由PC端通过网络传送到远端的电脑。-Program descr iption: network remote temperature sensor, this example uses the to (1) the 8051 port 1 to PORT 3 LCD monitor, the P3.3, P3.4 and P3.5 to LCD monitor control line, the program execution can make LCD monitor shows the time and date.

(2) temperature-sensing component AD590 via ADC0804 to sensing to temperature, converted to digital data, and then enter via PORT 0 8051.

(3) igangcai 8051 of clauses 10 and 11 foot TXD and RXD cabled to MAX232 respectively, and then connect to the PC s COM port.

　(4) when transmitted via RS232 PC-s, the next PC out of the next byte is used to set the output PORT 3.

　(5) when transmitted via RS232 PC-T, the next PC continuous sent out five bytes, the five bytes is the date-time " , this is the PC used to set the time and date the experimental Board.

　(6) the 8051 per minute enrolment ADC0804 conversion of digital temperature data, and then transmitted to the PC via RS232, then by the PC-side passed over the network to the remote compute