The monitoring of rainfall is an important reference factor in agriculture, transportation, etc. Therefore, it is very necessary to use the rainfall monitoring system for monitoring. The system is a master-slave distribution system composed of a PC and a single-chip microcomputer. The rainfall monitor is based on a single-chip microcomputer and has rainfall information collection, rainfall alarm, information storage and communication functions. The management department uses the PC as the main unit of the system and can set the system host or extension according to the rainfall monitor installation status.
Rainfall monitor for the transmission of serial remote data, the communication speed can reach different interface standards, different distances, different line quality will be different, even at the same line at different times can be the best The communication rate will also vary depending on the external environment affecting its line quality. If the information can be transmitted at an optimal rate (fast and reliable communication rate) at each time period, the utilization efficiency of the line and the reliability of the data communication must be improved.
Rainfall monitor to achieve the optimization of the communication rate, the first thing to be solved is the adaptive baud rate of both parties. Simple and reliable use of software methods to achieve automatic detection of baud rate and optimization in the dynamic, so that neither additional hardware support, but also less software overhead, but also improve the convenience and compatibility of baud rate demodulation This is of great practical significance.
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