diff --git a/knx_iot_virtual_pb.c b/knx_iot_virtual_pb.c
index 826d407..77fbe2e 100644
--- a/knx_iot_virtual_pb.c
+++ b/knx_iot_virtual_pb.c
@@ -516,7 +516,7 @@ get_OnOff_1(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -624,7 +624,7 @@ get_InfoOnOff_1(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -783,7 +783,7 @@ get_OnOff_2(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -891,7 +891,7 @@ get_InfoOnOff_2(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -1050,7 +1050,7 @@ get_OnOff_3(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -1158,7 +1158,7 @@ get_InfoOnOff_3(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -1317,7 +1317,7 @@ get_OnOff_4(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -1425,7 +1425,7 @@ get_InfoOnOff_4(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
diff --git a/knx_iot_virtual_sa.c b/knx_iot_virtual_sa.c
index d0fdcf0..ba3216f 100644
--- a/knx_iot_virtual_sa.c
+++ b/knx_iot_virtual_sa.c
@@ -559,7 +559,7 @@ get_OnOff_1(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -731,7 +731,7 @@ get_InfoOnOff_1(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -839,7 +839,7 @@ get_OnOff_2(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -1011,7 +1011,7 @@ get_InfoOnOff_2(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -1119,7 +1119,7 @@ get_OnOff_3(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |
@@ -1291,7 +1291,7 @@ get_InfoOnOff_3(oc_request_t *request, oc_interface_mask_t interfaces,
           char mystring[100];
           snprintf(mystring,99,"urn:knx:sn:%s%s",oc_string(device->serialnumber),
            oc_string(request->resource->uri));
-          oc_rep_i_set_text_string(root, 9, mystring);
+          oc_rep_i_set_text_string(root, 0, mystring);
         }
         // resource types
         if ((strncmp(m, "rt", m_len) == 0) |