Does anyone have already implemented zeroMQ as reliable message solution on cortexM3 nodes? I'm trying to understand if it is possible and to have a memory footprint idea of this. I will have freeRTOS OS maybe. Thanks for ideas and suggestions. Nicola
See this thread on the zeromq-dev list. It seems the 0MQ source makes extensive use of POSIX API, so would take some porting to be supported on a non POSIX OS. Moreover it requires a TCP/IP stack which may have a larger footprint that 0MQ itself.
For a port FreeRTOS may not be a good starting point - you'd either have to implement a porting layer to map the POSIX API calls to your RTOS and network stack, or modify the 0MQ source directly (which would make accepting updates problematic).
There are a number of RTOS with POSIX or POSIX-like APIs. Amongst free/open-source RTOS NuttX may be a better bet. It has a POSIX like API and a BSD sockets API stack.