I want to use Advance HMI with arduino use RS232 serial communication

[mdjumethun]

I have arduino board (without Ethernet shield). I want Advance HMI with arduino use RS232 serial communication . How doing it?
Please give driver . please help me

[Alejandro]

Hi..,

Arduino Has a MODBUS RTU library, you can dowload this library frome Arduino oficial web side. Then you have to install the library in arduino IDE.  try this library in Arduino to communicate with Advanced HMI via Modbus Rtu...!, this library work very well with NMODBUS a free control for Visual Studio. thanks..!

[neptun2002]

Hi..

there are to many libraries for Modbus RTU but I found that this one is practical it needs some improvement but it works

pleas have a look to the following link also there is example ready to use

https://code.google.com/p/arduino-modbus-slave/downloads/list

thanks