A class to manage Modbus frames and another to make a Modbusserver. Both classes are fully portable. An example of a modbusserver is given. The code is very simple and comprehensive.
Note ; Qt includes some classes related to Modbus since Qt 5.6.
Compiere MFG+SCM Manufacturing Extended System (MES). Include Shop Floor Control, Supply chain management, Quality management, modbus interface, iReport barcode extension etc. Support batch and on demand manufacturing. Works alone or connected to ERP.
An OPC-XML compliant server for the MODBUS protocol used in process controllers and PLCs. It will provide low-cost access to plant data and support futher development of Open SCADA applications. Based on the OpenDA (opc-xml) project.