[SNMP]define SNMP_MAX_COMMUNITY_STR_LEN

modules/Ethernet/lwipopts.h

@@ -156,6 +156,8 @@ a lot of data that needs to be copied, this should be set high. */
 //#define SNMP_TRAP_DESTINATIONS          1
 //#define SNMP_PRIVATE_MIB                1
 //#define SNMP_SAFE_REQUESTS              1
+
+#define SNMP_MAX_COMMUNITY_STR_LEN        19
      
 
 /* ---------- UDP options ---------- */