diff --git a/hdlc/client.c b/hdlc/client.c
index cc9071f..854c25b 100644
--- a/hdlc/client.c
+++ b/hdlc/client.c
@@ -12,6 +12,11 @@ bool FLAG_FILL_BUFFER2 = false;
 bool FLAG_FILL_BUFFER3 = false;
 bool FLAG_FILL_BUFFER4 = false;
 
+bool FLAG_SEND_BUFFER1 = false;
+bool FLAG_SEND_BUFFER2 = false;
+bool FLAG_SEND_BUFFER3 = false;
+bool FLAG_SEND_BUFFER4 = false;
+
 #define ERR_INVALID_DATA_SIZE -1
 #define ERR_ALL_BUFFERS_FILL -2
 
@@ -69,23 +74,47 @@ int get_frame(struct Client* client, uint8_t buffer[], size_t lenBuffer){
     switch (client->state) {
         case CONNECTING:
             if (client->connecting_frame_timeout <= 0){
-                control_send.frame = HDLC_FRAME_ACK;
+                control_send.frame = S_FRAME;
                 control_send.seq_no = 1;
 
                 int ret = hdlc_frame_data(&control_send, NULL, 0, buffer, &lenBuffer);
                 if (ret < 0){
-                    printf("err in get_frame ACK: %d\n", ret);
+                    printf("err in get_frame S_FRAME: %d\n", ret);
                 }
 
                 client->connecting_frame_timeout = CONNECT_FRAME_PERIOD;
             }
             break;
         case READY_STATE:
-            control_send.frame = HDLC_FRAME_DATA;
+            control_send.frame = I_FRAME;
             control_send.seq_no = 1;
-            int ret = hdlc_frame_data(&control_send, buffer_data[0], SIZE_DATA_BUFFER, buffer, &lenBuffer);
-            if (ret < 0){
-                printf("err in get_frame DATA: %d\n", ret);
+            if (FLAG_FILL_BUFFER1 && !FLAG_SEND_BUFFER1){
+                int ret = hdlc_frame_data(&control_send, buffer_data[0], SIZE_DATA_BUFFER, buffer, &lenBuffer);
+                if (ret < 0){
+                    printf("err in get_frame I_FRAME: %d\n", ret);
+                }
+                FLAG_SEND_BUFFER1 = true;
+            }
+            if (FLAG_FILL_BUFFER2 && !FLAG_SEND_BUFFER2){
+                int ret = hdlc_frame_data(&control_send, buffer_data[1], SIZE_DATA_BUFFER, buffer, &lenBuffer);
+                if (ret < 0){
+                    printf("err in get_frame I_FRAME: %d\n", ret);
+                }
+                FLAG_SEND_BUFFER2 = true;
+            }
+            if (FLAG_FILL_BUFFER3 && !FLAG_SEND_BUFFER3){
+                int ret = hdlc_frame_data(&control_send, buffer_data[2], SIZE_DATA_BUFFER, buffer, &lenBuffer);
+                if (ret < 0){
+                    printf("err in get_frame I_FRAME: %d\n", ret);
+                }
+                FLAG_SEND_BUFFER3 = true;
+            }
+            if (FLAG_FILL_BUFFER4 && !FLAG_SEND_BUFFER4){
+                int ret = hdlc_frame_data(&control_send, buffer_data[3], SIZE_DATA_BUFFER, buffer, &lenBuffer);
+                if (ret < 0){
+                    printf("err in get_frame I_FRAME: %d\n", ret);
+                }
+                FLAG_SEND_BUFFER4 = true;
             }
             break;
     }