Using arduino editor, realize modbus- RTU agreement, only need to call a simple interface will be able to achieve the corresponding function code

ModbusMaster-master
...................\.gitignore
...................\.ruby-gemset
...................\.ruby-version
...................\CONTRIBUTING.md
...................\COPYING
...................\Gemfile
...................\HISTORY.md
...................\INSTALL
...................\ModbusMaster.cpp
...................\ModbusMaster.h
...................\README.md
...................\Rakefile
...................\STYLE.md
...................\VERSION
...................\doc
...................\...\Doxyfile
...................\...\ModbusMaster reference-0.10.0.pdf
...................\...\ModbusMaster reference-0.10.1.pdf
...................\...\ModbusMaster reference-0.10.2.pdf
...................\...\ModbusMaster reference-0.10.3.pdf
...................\...\ModbusMaster reference-0.11.0.pdf
...................\...\ModbusMaster reference-0.9.0.pdf
...................\...\ModbusMaster reference-0.9.1.pdf
...................\...\README.txt
...................\examples
...................\........\Basic
...................\........\.....\Basic.pde
...................\........\PhoenixContact_nanoLC
...................\........\.....................\PhoenixContact_nanoLC.pde
...................\keywords.txt
...................\library.properties
...................\util
...................\....\crc16.h
...................\....\word.h

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