diff --git a/BLEh.c b/BLEh.c
index 55bfc7a..00e953b 100644
--- a/BLEh.c
+++ b/BLEh.c
@@ -19,6 +19,7 @@
 #define TAG "BLEh"
 
 static uint16_t conn_handle;
+static uint8_t conn_state;
 
 static struct ble_gatt_svc_def* gatt_svr_svcs;
 static uint16_t svcs_num;
@@ -72,14 +73,17 @@ static int ble_gap_event(struct ble_gap_event *event, void* arg){
     case BLE_GAP_EVENT_CONNECT:
       if(event->connect.status)
         ble_advertise();
-      else
+      else{
         conn_handle = event->connect.conn_handle;
+        conn_state = 1;
+      }
     break;
     case BLE_GAP_EVENT_DISCONNECT:
+      conn_state = 0;
       ble_advertise();
     break;
     case BLE_GAP_EVENT_SUBSCRIBE:
-      ESP_LOGI(TAG, "Subscribe %d", event->subscribe.attr_handle);
+      ESP_LOGI(TAG, "Subscribe %d %d", event->subscribe.attr_handle, event->subscribe.cur_notify);
       uint8_t* target_state = get_notify_state(event->subscribe.attr_handle);
       if(target_state == NULL)
         ESP_LOGE(TAG, "Unknown notification requested");
@@ -212,6 +216,8 @@ void print_service(struct ble_gatt_svc_def* svcs){
 }
 
 void notify(uint16_t svc_ind, uint16_t chr_ind, void* value, size_t value_size){
+  if(!conn_state) return;
+
   uint16_t handle = get_att_handle(svc_ind, chr_ind);
   
   uint8_t state = *get_notify_state_from_indices(svc_ind, chr_ind);
diff --git a/include/simple_gatt_value_server.h b/include/simple_gatt_value_server.h
index fd06926..e50c319 100644
--- a/include/simple_gatt_value_server.h
+++ b/include/simple_gatt_value_server.h
@@ -6,9 +6,18 @@
 #include "BLEh.h"
 #include <stdint.h>
 
-typedef void* gatt_value_server_handle_t;
+struct serve_conf {
+  uint8_t* value;
+  size_t value_size;
+  struct char_pres_format* format;
+  uint16_t svc_ind;
+  uint16_t chr_ind;
+};
 
-gatt_value_server_handle_t simple_gatt_value_server(void* values, int values_num, size_t values_size, struct char_pres_format format, struct ble_gatt_svc_def* svc, uint16_t svc_ind, ble_uuid_t* uuid);
+typedef struct serve_conf** gatt_value_server_handle_t;
+
+gatt_value_server_handle_t simple_gatt_value_server(void* values, size_t values_size, int values_num, struct char_pres_format* format[], struct ble_gatt_svc_def* svc, uint16_t svc_ind, ble_uuid_t* uuid);
+gatt_value_server_handle_t simple_gatt_identical_values_server(void* values, size_t values_size, int values_num, struct char_pres_format* format, struct ble_gatt_svc_def* svc, uint16_t svc_ind, ble_uuid_t* uuid);
 void simple_gatt_value_server_deinit();
 
 void simple_gatt_value_server_notify(gatt_value_server_handle_t handle, int values_num);
\ No newline at end of file
diff --git a/simple_gatt_value_server.c b/simple_gatt_value_server.c
index 7247c6f..00c06b5 100644
--- a/simple_gatt_value_server.c
+++ b/simple_gatt_value_server.c
@@ -11,22 +11,13 @@
 
 #include "BLE_UUID.h"
 #include "BLEh.h"
+#include "simple_gatt_value_server.h"
 
 #define TAG "GATT value server"
 
-struct serve_conf {
-  uint8_t* value;
-  size_t value_size;
-  struct char_pres_format* format;
-  uint16_t svc_ind;
-  uint16_t chr_ind;
-};
-
 static struct serve_conf** serve_confs;
-typedef struct serve_conf** gatt_value_server_handle_t;
 
 static uint16_t svcs_num = 0;
-struct char_pres_format* formats;
 struct ble_gatt_chr_def** chars;
 struct ble_gatt_dsc_def** descrs;
 
@@ -53,21 +44,18 @@ int read_handler(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_acc
 
 ble_uuid_t* char_pres_format = BLE_UUID16_DECLARE(CHAR_PRES_FORMAT);
 
-gatt_value_server_handle_t simple_gatt_value_server(uint8_t* values, size_t value_size, int values_num, struct char_pres_format format, struct ble_gatt_svc_def* svc, uint16_t svc_ind, ble_uuid_t* char_uuid){
+gatt_value_server_handle_t simple_gatt_value_server(void* values, size_t value_size, int values_num, struct char_pres_format* format[], struct ble_gatt_svc_def* svc, uint16_t svc_ind, ble_uuid_t* char_uuid){
   struct ble_gatt_chr_def* chrs = malloc((values_num + 1) * sizeof(struct ble_gatt_chr_def));
 
-  formats = realloc(formats, (svcs_num + 1) * sizeof(struct char_pres_format));
   chars = realloc(chars, (svcs_num + 1) * sizeof(struct ble_gatt_chr_def*));
   chars[svcs_num] = chrs;
 
-  memcpy(&formats[svcs_num], &format, sizeof(format));
-
   for(int i = 0; i < values_num; i++){
     serve_confs = realloc(serve_confs, (serve_num + 1) * sizeof(struct serve_conf*));
     serve_confs[serve_num] = malloc(sizeof(struct serve_conf));
     serve_confs[serve_num]->value = values+(i*value_size);
     serve_confs[serve_num]->value_size = value_size;
-    serve_confs[serve_num]->format = &formats[svcs_num];
+    serve_confs[serve_num]->format = format[i];
     serve_confs[serve_num]->svc_ind = svc_ind;
     serve_confs[serve_num]->chr_ind = i;
 
@@ -103,10 +91,16 @@ gatt_value_server_handle_t simple_gatt_value_server(uint8_t* values, size_t valu
   return &serve_confs[serve_num - values_num];
 }
 
+gatt_value_server_handle_t simple_gatt_identical_values_server(void* values, size_t values_size, int values_num, struct char_pres_format* format, struct ble_gatt_svc_def* svc, uint16_t svc_ind, ble_uuid_t* uuid){
+  struct char_pres_format* formats[values_num];
+  for(int i = 0; i < values_num; i++) formats[i] = format;
+
+  return simple_gatt_value_server(values, values_size, values_num, formats, svc, svc_ind, uuid);
+}
+
 void simple_gatt_value_server_deinit(){
   for(int i = 0; i < serve_num; i++) free(serve_confs[i]);
   free(serve_confs);
-  free(formats);
   for(int i = 0; i < svcs_num; i++)
     free(chars[i]);
   free(chars);