lwIP 2.2.0 Lightweight IP stack

Debugging memory pool sizes

If you have issues with lwIP and you are using memory pools, check that your pools are correctly sized.
To debug pool sizes, #define LWIP_STATS and MEMP_STATS to 1. Check the global variable lwip_stats.memp[] using a debugger. If the "err" member of a pool is > 0, the pool may be too small for your application and you need to increase its size.