Could you post your current code? If I get a chance I will load it on my N+ this weekend and have a look.
Thanks Charles,
But I found the way to solve the issue
We need to disable IP_SOF_BROADCAST_RECV define in opt.h. This a filter at pcb level to drop any broadcast.
Instead of changing the firmware, I also see that we can leave this define as it is, and enable the pcb options SOF_BROADCAST to also solve this issue. I just need to find the way to enable it at C# level.
Pascal