diff --git a/oepl-esp-ap-proto.h b/oepl-esp-ap-proto.h
old mode 100644
new mode 100755
index babb547a..d5fa336d
--- a/oepl-esp-ap-proto.h
+++ b/oepl-esp-ap-proto.h
@@ -26,3 +26,10 @@ struct espAvailDataReq {
     struct AvailDataReq adr;
 } __packed;
 
+struct espTagReturnData {
+    uint8_t checksum;
+    uint8_t src[8];
+    uint8_t len;
+    struct tagReturnData returnData;
+} __packed;
+
diff --git a/oepl-proto.h b/oepl-proto.h
old mode 100644
new mode 100755
index fa93e374..33ea3528
--- a/oepl-proto.h
+++ b/oepl-proto.h
@@ -56,6 +56,8 @@ struct MacFrameBcast {
     uint8_t src[8];
 } __packed;
 
+#define PKT_TAG_RETURN_DATA 0xE1
+#define PKT_TAG_RETURN_DATA_ACK 0xE2
 #define PKT_AVAIL_DATA_SHORTREQ 0xE3
 #define PKT_AVAIL_DATA_REQ 0xE5
 #define PKT_AVAIL_DATA_INFO 0xE6
@@ -123,9 +125,14 @@ struct blockData {
     uint8_t data[];
 } __packed;
 
-struct burstMacData {
-    uint16_t offset;
-    uint8_t targetMac[8];
+#define TAG_RETURN_DATA_SIZE 90
+
+struct tagReturnData {
+    uint8_t checksum;
+    uint8_t partId;
+    uint64_t dataVer;
+    uint8_t dataType;
+    uint8_t data[TAG_RETURN_DATA_SIZE];
 } __packed;
 
 #define BLOCK_PART_DATA_SIZE 99
@@ -177,4 +184,3 @@ struct ledFlash {
     uint8_t repeats;
     uint8_t spare;
 } __packed;
-