diff --git a/armsrc/appmain.c b/armsrc/appmain.c
index 9e8a9d72b..9771939d3 100644
--- a/armsrc/appmain.c
+++ b/armsrc/appmain.c
@@ -1169,7 +1169,7 @@ void UsbPacketReceived(uint8_t *packet, int len) {
 			LED_B_OFF();
 			break;
 		}
-		case CMD_WIPE_FLASH_MEM:
+		case CMD_WIPE_FLASH_MEM: {
 			LED_B_ON();
 			uint8_t page = c->arg[0];
 			uint8_t initalwipe = c->arg[1];
@@ -1186,6 +1186,7 @@ void UsbPacketReceived(uint8_t *packet, int len) {
 			cmd_send(CMD_ACK, isok, 0, 0, 0, 0);
 			LED_B_OFF();
 			break;
+		}
 		case CMD_DOWNLOAND_FLASH_MEM: {
 
 			LED_B_ON();
@@ -1197,8 +1198,6 @@ void UsbPacketReceived(uint8_t *packet, int len) {
 			// arg0 = startindex
 			// arg1 = length bytes to transfer
 			// arg2 = RFU
-			//Dbprintf("transfer to client parameters: %" PRIu32 " | %" PRIu32 " | %" PRIu32, startidx, numofbytes, c->arg[2]);
-
 			for (size_t i = 0; i < numofbytes; i += USB_CMD_DATA_SIZE) {
 				len = MIN((numofbytes - i), USB_CMD_DATA_SIZE);
 				
@@ -1215,6 +1214,23 @@ void UsbPacketReceived(uint8_t *packet, int len) {
 			LED_B_OFF();
 			break;
 		}
+		case CMD_INFO_FLASH_MEM: {
+
+			LED_B_ON();
+			rdv40_validation_t *info = (rdv40_validation_t*)BigBuf_malloc( sizeof(rdv40_validation_t) );
+			
+			bool isok = Flash_ReadData(FLASH_MEM_SIGNATURE_OFFSET, info->signature, FLASH_MEM_SIGNATURE_LEN);
+
+			if (FlashInit()) {
+				Flash_UniqueID( info->flashid);
+				FlashStop();
+			}
+			cmd_send(CMD_ACK, isok, 0, 0, info, sizeof(rdv40_validation_t));
+			BigBuf_free();
+			
+			LED_B_OFF();			
+			break;
+		}
 #endif
 		case CMD_SET_LF_DIVISOR:
 		  	FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
diff --git a/include/common.h b/include/common.h
index fe5eaeb59..8fdb45ab0 100644
--- a/include/common.h
+++ b/include/common.h
@@ -4,7 +4,7 @@
 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
 // at your option, any later version. See the LICENSE.txt file for the text of
 // the license.
-
+//
 //-----------------------------------------------------------------------------
 // Interlib Definitions
 //-----------------------------------------------------------------------------
@@ -46,6 +46,35 @@ extern int MF_DBGLEVEL;
 #endif
 #define RAMFUNC __attribute((long_call, section(".ramfunc")))
 
+// RDV40 Section
+#ifndef FLASH_MEM_BLOCK_SIZE
+# define FLASH_MEM_BLOCK_SIZE   256
+#endif
+
+#ifndef FLASH_MEM_MAX_SIZE
+# define FLASH_MEM_MAX_SIZE     0x3FFFF
+#endif
+
+#ifndef FLASH_MEM_ID_LEN
+# define FLASH_MEM_ID_LEN			8
+#endif
+
+#ifndef FLASH_MEM_SIGNATURE_LEN
+# define FLASH_MEM_SIGNATURE_LEN	128
+#endif
+
+#ifndef FLASH_MEM_SIGNATURE_OFFSET
+# define FLASH_MEM_SIGNATURE_OFFSET	(FLASH_MEM_MAX_SIZE - FLASH_MEM_SIGNATURE_LEN)
+#endif
+
+
+// RDV40,  validation structure to help identifying that client/firmware is talking with RDV40
+typedef struct {
+	uint8_t magic[4];
+	uint8_t flashid[FLASH_MEM_ID_LEN];
+	uint8_t signature[FLASH_MEM_SIGNATURE_LEN];
+} __attribute__((__packed__)) rdv40_validation_t;
+
 
 #ifdef __cplusplus
 }
diff --git a/include/usb_cmd.h b/include/usb_cmd.h
index 477258c58..ea8d45461 100644
--- a/include/usb_cmd.h
+++ b/include/usb_cmd.h
@@ -67,12 +67,13 @@ typedef struct{
 #define CMD_DOWNLOAD_EML_BIGBUF											  0x0110
 #define CMD_DOWNLOADED_EML_BIGBUF										  0x0111
 
-// For Flash memory operations
+// RDV40, Flash memory operations
 #define CMD_READ_FLASH_MEM												  0x0120
 #define CMD_WRITE_FLASH_MEM												  0x0121
 #define CMD_WIPE_FLASH_MEM												  0x0122
 #define CMD_DOWNLOAND_FLASH_MEM											  0x0123
 #define CMD_DOWNLOADED_FLASHMEM											  0x0124
+#define CMD_INFO_FLASH_MEM												  0x0125
 
 // For low-frequency tags
 #define CMD_READ_TI_TYPE                                                  0x0202