wget http://libmodbus.org/site_media/build/libmodbus-3.0.5.tar.gz
sudo chmod 755 libmodbus-3.0.5.tar.gz
tar zxvf libmodbus-3.0.5.tar.gz -C .
cd libmodbus-3.0.5/
./configure
make
sudo make install

apt-get install python-pip python-dev
pip install pymodbus

make all
ls -l ./bin

python ./modbusemulator/modbusemulator.py --emu-type tcp --slave-id 1 --host 127.0.0.1 --port 55688

./bin/tcpmodbuscli

./bin/rtumodbuscli