Hi my name is Robert and I need to use modbus in mbed microcontroller
(c++).
<pre>But I need tcp slave and serial master, libraries you provide to mbed
doesn't support two instances.</pre>
I would my program uses tcp and serial because I need to establish communications between server (tcp) and Serial controller. Imagine, Is a traductor, I wait tcp petitions and when tcp petition arrives I traduce it in a serial communication context and the program send data of the packet to the serial port and receive a response to the device use modbus protocol in all cases.

Thanks

 

You may use our Open Source library.
The according Modbus class can be found here:
http://pvbrowser.org/pvbrowser/sf/manual/rllib/html/classrlModbus.html

The library is part of our http://pvbrowser.org project.
You can get the standalone library here:
http://pvbrowser.de/pvbrowser/tar/rllib.tar.gz

The Modbus class supports
- serial line and TCP
- RTU and Ascii protocol
- Master and Slave