GitHub - abhinavgupta/Modbus-protocol-RS485: Implementation of Modbus protocol for a data logger project back that I worked back in my 3rd year of college. This is a low overhead wireless communication protocol based of differential data communication viz. RS485. The code is written for Arduino environment but care has been taken that the code can be portable on virtually any type of machine. The codes are written by adressing the register addresses directly in the code.

abhinavgupta / Modbus-protocol-RS485 Public

Implementation of Modbus protocol for a data logger project back that I worked back in my 3rd year of college. This is a low overhead wireless communication protocol based of differential data communication viz. RS485. The code is written for Arduino environment but care has been taken that the code can be portable on virtually any type of machi…

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Name		Name	Last commit message	Last commit date
Latest commit History 1 Commits
Arduino Sketches		Arduino Sketches
ModbusSlave		ModbusSlave
mbslave_lib_example		mbslave_lib_example
mbslave_pde_example		mbslave_pde_example
Makefile		Makefile
README		README
mbm.c		mbm.c
modbus_rtu.c		modbus_rtu.c
modbus_rtu.h		modbus_rtu.h

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1 - Open either sketch on your Arduino IDE:
	- mbslave_pde_example.pde is programed in C. The complete modbus implementation is inside the sketch. Nothing else is needed.
	- mbslave_lib_example.pde uses the ModbusSlave library. The library is included in this directory as the directory ModbusSlave. See Arduino 		  library reference on the internet to see how to install the library. 
	
2 - upload your selected sketch into your arduino.

3 - on your linux console, change to the directory where you unpacked mbslave_examples.tar.gz file, and type:
make
this will create the Modbus master file mbm. 

4 - Run the executable:
./mbm

You will see the led of your arduino turn off (if it was on), then turn on
for 2 seconds, then blink quite fast for 3 secs, and then blink slower for
6 seconds.

You can of course use other Modbus master implementations for your test.

Other things to be noticed is the PDE Sketches folder. This is version 1.0 implementation of MODBUS protocol. The c file in the folder can be used with certain modifications as a universal file that can run on virutally any microcontroller.