diff --git a/example/libusb/ble_client.c b/example/libusb/ble_client.c
index 654caad49..36fecd6d3 100644
--- a/example/libusb/ble_client.c
+++ b/example/libusb/ble_client.c
@@ -293,7 +293,7 @@ static le_command_status_t send_gatt_read_blob_request(le_peripheral_t *peripher
     return att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->handle, peripheral->attribute_handle, peripheral->attribute_offset);
 }
 
-static le_command_status_t send_gatt_write_characteristic_value_request(le_peripheral_t * peripheral){
+static le_command_status_t send_gatt_write_attribute_value_request(le_peripheral_t * peripheral){
     return att_write_request(ATT_WRITE_REQUEST, peripheral->handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value);
 }
 
@@ -526,7 +526,7 @@ static void handle_peripheral_list(){
                 break;
             
             case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE:
-                status = send_gatt_write_characteristic_value_request(peripheral);
+                status = send_gatt_write_attribute_value_request(peripheral);
                 if (status != BLE_PERIPHERAL_OK) break;
                 peripheral->state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT;
                 break;
@@ -572,6 +572,12 @@ static void handle_peripheral_list(){
                 if (status != BLE_PERIPHERAL_OK) break;
                 peripheral->state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT;
                 break;
+
+            case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR:
+                status = send_gatt_write_attribute_value_request(peripheral);
+                if (status != BLE_PERIPHERAL_OK) break;
+                peripheral->state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT;
+                break;
                 
             case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION:
                 status = send_gatt_write_client_characteristic_configuration_request(peripheral);
@@ -881,6 +887,29 @@ le_command_status_t le_central_read_long_characteristic_descriptor(le_peripheral
     return BLE_PERIPHERAL_OK;
 }
 
+le_command_status_t le_central_write_characteristic_descriptor(le_peripheral_t *peripheral, le_characteristic_descriptor_t * descriptor, uint16_t length, uint8_t * value){
+    
+    peripheral->attribute_handle = descriptor->handle;
+    peripheral->attribute_length = length;
+    peripheral->attribute_offset = 0;
+    peripheral->attribute_value = value;
+    
+    peripheral->state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR;
+    gatt_client_run();
+    return BLE_PERIPHERAL_OK;
+}
+
+le_command_status_t le_central_write_long_characteristic_descriptor(le_peripheral_t *peripheral, le_characteristic_descriptor_t * descriptor, uint16_t length, uint8_t * value){
+    peripheral->attribute_handle = descriptor->handle;
+    peripheral->attribute_length = length;
+    peripheral->attribute_offset = 0;
+    peripheral->attribute_value = value;
+    
+    peripheral->state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR;
+    gatt_client_run();
+    return BLE_PERIPHERAL_OK;
+}
+
 
 static void gatt_client_run(){
     if (state == W4_ON) return;
@@ -1438,6 +1467,9 @@ static void att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *pa
                     peripheral->state = P_CONNECTED;
                     send_gatt_complete_event(peripheral, GATT_CLIENT_CHARACTERISTIC_CONFIGURATION_COMPLETE, 0);
                     break;
+                case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:
+                    send_gatt_complete_event(peripheral, GATT_CHARACTERISTIC_DESCRIPTOR_WRITE_RESPONSE, 0);
+                    break;
                 default:
                     break;
             }
diff --git a/example/libusb/ble_client.h b/example/libusb/ble_client.h
index dea80deb9..84cc98aab 100644
--- a/example/libusb/ble_client.h
+++ b/example/libusb/ble_client.h
@@ -123,7 +123,10 @@ typedef enum {
     
     P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY,
     P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT,
-
+    
+    P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR,
+    P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT,
+    
     P_W2_CANCEL_CONNECT,
     P_W4_CONNECT_CANCELLED,
     P_W2_DISCONNECT,
diff --git a/include/btstack/hci_cmds.h b/include/btstack/hci_cmds.h
index 6b54529fb..801c82ddb 100644
--- a/include/btstack/hci_cmds.h
+++ b/include/btstack/hci_cmds.h
@@ -247,7 +247,10 @@ extern "C" {
 #define GATT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT        0xC2
 #define GATT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT   0xC3
 #define GATT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_COMPLETE 0xC4
-
+#define GATT_CHARACTERISTIC_DESCRIPTOR_WRITE_RESPONSE      0xC5
+#define GATT_LONG_CHARACTERISTIC_DESCRIPTOR_WRITE_RESPONSE 0xC6
+#define GATT_LONG_CHARACTERISTIC_DESCRIPTOR_WRITE_COMPLETE 0xC7
+    
 // data: event(8), len(8), status (8), hci_handle (16), attribute_handle (16)
 #define ATT_HANDLE_VALUE_INDICATION_COMPLETE        	   0xBF