Using the PIC18F97J60 high-performance single-chip microcomputer integrated with Ethernet controller, a new type of pressure detection instrument with integrated Ethernet interface is proposed and implemented. According to the characteristics and working principle of the PIC18F97J60 single-chip microcomputer, the pressure sensor signal conditioning circuit, Butterworth low-pass filter circuit and Ethernet interface circuit are designed, and an application based on the Ethernet protocol stack is developed. Actual use shows that the pressure detection instrument can be directly connected to the Ethernet, realizing the real-time online reading and network transmission of pressure detection data compatible with both TCP/IP protocol and UDP protocol message formats.
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