testing-stepbystep-linux.txt

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Linux General Installation & Hardware Requirements
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1)Raspbian or Ubuntu

- sudo apt-get update -y && sudo apt-get upgrade -y
- modprobe usbserial (load linux kernel modules - FTDI, CP210X, PL2303 or CH340G USB chipset)

2)Hardware

- RS485 Cable ( shielded twisted pair - 2 wire)
- RS485 to USB Convertor
- Modbus Enabled Energy Meter(Modbus - RTU with Registry Mappings)


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libmodbus Installation
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1) Installing dependancies.

sudo apt-get install -y autoconf libtool

2) Clone libmodbus master branch by,

git clone https://github.com/stephane/libmodbus/

3) Enter the directory.

cd libmodbus

4) ./autogen.sh && ./configure –prefix=/usr && make && sudo make install

./autogen.sh && ./configure prefix=/usr && make && sudo make install

sudo ldconfig

5) To test the libmodbus, try examples under tests folder.

To compile code, use, gcc -o filename filename.c pkg-config –libs –cflags lidmodbus

pkg-config --libs --cflags libmodbus

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C Program Compile
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1) Compile code

gcc -o modbus-loop-working -I/usr/local/include/modbus/ modbus-loop-working.c -lmodbus

2)Execute the code

./modbus-loop-working