I want to make a system where there is a server (arduino mega) it is connected to a slave (arduino uno) through Ethernet shields. and the website is available on arduino mega to view values.
Now i would like to add a temp sensor on the slave and display the value on the website. website is up and running but i want to implement MODBUS TCP between the server and slave, im stuck i dont knw how to start? A simple example for understanding? Any help would be great.
I have read the spec of MODBUS and the implementation guide im new to ardunio i cant seem to make out how to start implementing MODBUS TCP :S