Design of Handheld Communicator Based on HART Protocol As a transitional protocol in fieldbus, HART protocol has become a de facto industrial standard. This article designs a handheld communicator based on HART protocol. The hardware design of the handheld communicator is elaborated in detail, and specific solutions are given to the difficult parts of its hardware design. At the same time, the article also introduces the software design of HART protocol in the handheld communicator. The handheld communicator designed by this scheme is now used for field communication of intelligent instruments. Practice has proved that it has met the communication requirements of fieldbus.
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