Hello, I test the evapi modules function , but not full operation ,only receive not send to client I capture the important setup parameters are as follows: debug=3 loadmodule "evapi.so" #----- evapi params ----- # modparam("evapi", "bind_addr", "0.0.0.0:8448") modparam("evapi", "netstring_format", 0) modparam("evapi", "workers", 4) event_route[evapi:connection-new] { evapi_relay("{ \"event\": \"test\",\n \"data\": { \"fU\": \"fU\" }\n}"); xlog("L_WARN", "new connection from $evapi(srcaddr):$evapi(srcport)\n"); } scene : One client connected kamailio server x.x.x.x:8448 use nc tools , I get garbled , kamailioserver not sent to me client , Because this is the right format to display josn ? sh-4.2# nc -n x.x.x.x 8448 ; øX±š^C any suggestions or missing something ? my syslog : Mar 28 14:31:37 SIP /home/pkg/kamailio-4.2.3/sbin/kamailio[297164]: DEBUG: evapi [evapi_dispatch.c:385]: evapi_accept_client(): new connection - pos[0] from: [x.x.x.x:56215] Mar 28 14:31:37 SIP /home/pkg/kamailio-4.2.3/sbin/kamailio[297164]: DEBUG: evapi [evapi_dispatch.c:531]: evapi_relay(): relaying event data [{ "event": "test",#012 "data": { "fU": "fU" }#012}] Mar 28 14:31:37 SIP /home/pkg/kamailio-4.2.3/sbin/kamailio[297164]: DEBUG: evapi [evapi_dispatch.c:561]: evapi_relay(): sent [0x7f939ab158f8] [{ "event": "test",#012 "data": { "fU": "fU" }#012}] (44) Mar 28 14:31:37 SIP /home/pkg/kamailio-4.2.3/sbin/kamailio[297164]: WARNING: <script>: new connection from x.x.x.x:56215 kamailio server : root@SIP:/etc/init.d# dpkg -l | grep libev-dev ii libev-dev 1:4.11-1 amd64 static library, header files, and docs for libev root@SIP:/etc/init.d# uname -a Linux SIP 3.2.0-4-amd64 #1 SMP Debian 3.2.46-1+deb7u1 x86_64 GNU/Linux root@SIP:/home/pkg/kamailio-4.2.3/sbin# ./kamailio -V version: kamailio 4.2.3 (x86_64/linux) flags: STATS: Off, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, F_MALLOC, DBG_F_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown compiled on 15:13:09 Mar 27 2015 with gcc 4.7.2 download : http://www.kamailio.org/pub/kamailio/latest/src/kamailio-4.2.3_src.tar.gz