diff --git a/config.mk b/config.mk
index 3b19465..61c11c2 100644
--- a/config.mk
+++ b/config.mk
@@ -4,4 +4,5 @@ PUBLISHER_ADDR=localhost
 
 ##### Logger/Publisher
 LOGGERS_DIR=./logs
-LOG_INTERVAL=30
\ No newline at end of file
+LOG_INTERVAL=30
+KEY=node1
\ No newline at end of file
diff --git a/src/client.c b/src/client.c
index 35a62c6..cd01232 100644
--- a/src/client.c
+++ b/src/client.c
@@ -15,10 +15,11 @@ int main (int argc, char *argv [])
     exit(1);
   }
 
+  //----- Arguments
   char *ip=argv[1];
   int port=atoi(argv[2]);
 
-  //  Socket to talk to server
+  //----- Init ZMQ
   void *context = zmq_ctx_new ();
   void *subscriber = zmq_socket (context, ZMQ_SUB);
   char bindto[30];
@@ -31,12 +32,14 @@ int main (int argc, char *argv [])
   rc = zmq_setsockopt (subscriber, ZMQ_SUBSCRIBE,
                         ZMQ_TOKEN, strlen(ZMQ_TOKEN));
 
-
-
-  char buffer[10];
-  zmq_recv (subscriber, buffer, 10, 0);
-  printf("Received!");
-
+  //----- Listen
+  char buffer[ZMQ_MSG_SIZE];
+  int size;
+  while(1){
+    size=zmq_recv (subscriber, buffer, ZMQ_MSG_SIZE-1, 0);
+    buffer[size < ZMQ_MSG_SIZE ? size : ZMQ_MSG_SIZE - 1] = '\0';
+    printf("Received: %s\n",buffer);
+  }
 
 
 
diff --git a/src/publisher.c b/src/publisher.c
index 51096ef..45a248e 100644
--- a/src/publisher.c
+++ b/src/publisher.c
@@ -11,15 +11,16 @@
 
 // Global:
 char *__logdir;
+char *__key;
 int __loginterval;
 int __port;
 
-void publish(void *publisher, char *filepath, char* client, int interval);
+void publish(void *publisher, char *filepath, char* client, long int interval);
 
 int main (int argc, char *argv [])
 {
-    if(argc != 4){
-        printf("Usage: %s <abslogdir> <loginterval> <port>",argv[0]);
+    if(argc != 5){
+        printf("Usage: %s <abslogdir> <loginterval> <port> <key>",argv[0]);
         exit(1);
     }
 
@@ -27,6 +28,7 @@ int main (int argc, char *argv [])
     __logdir=argv[1];
     __loginterval=atoi(argv[2]);
     __port=atoi(argv[3]);
+    __key=argv[4];
 
     //----- Prepare our context and publisher
     void *context = zmq_ctx_new ();
@@ -88,7 +90,9 @@ int main (int argc, char *argv [])
     return 0;
 }
 
-void publish(void *publisher, char *filepath, char* client, int interval){
+void publish(void *publisher, char *filepath, char* client, long int interval){
     printf("Publish!\n");
-    zmq_send (publisher, ZMQ_TOKEN, strlen(ZMQ_TOKEN), 0);
+    char buffer[ZMQ_MSG_SIZE];
+    sprintf(buffer,"%s\n%s\n%ld",ZMQ_TOKEN,__key,interval);
+    zmq_send (publisher, buffer, ZMQ_MSG_SIZE, 0);
 }
\ No newline at end of file
diff --git a/src/utils.h b/src/utils.h
index 15b71b1..79d1a9a 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -9,6 +9,7 @@
 #define INA260_SYSFS "/sys/kernel/ina260"
 #define INA260_POWER_REGISTER "registers/power"
 #define ZMQ_TOKEN "ina260-zmq-publisher"
+#define ZMQ_MSG_SIZE 255
 
 #define STR(symbol) #symbol
 #define STRINGIFY(symbol) STR(symbol)