modbus tcp port
> So it looks like you have read my request too fast.
Maybe, sorry.
> Then this unique modbus tcp port is based on uIP which is just another lightweight ethernet stack but not lwIP stack
In case if nobody comes forward with lwIP port of FreeModbus, I think you shouldn’t be too fast to dismiss this Chinese example. The whole “port” is in this directory, it’s just a couple of hundreds lines of code. It must be relatively easy to change the uIP functions with the lwIP functoins and you will have your lwIP port of FreeModbus. Or at least it might give you the idea how to create your own port. It’s straightforward, you must implement some callback functions of the transport layer.