diff --git a/slsReceiverSoftware/CMakeLists.txt b/slsReceiverSoftware/CMakeLists.txt
index 98f3574b2..79c9b6c73 100644
--- a/slsReceiverSoftware/CMakeLists.txt
+++ b/slsReceiverSoftware/CMakeLists.txt
@@ -18,6 +18,12 @@ include_directories(
     ../slsDetectorCalibration
 )
 
+add_library(zmq STATIC IMPORTED )
+
+set_target_properties(zmq PROPERTIES
+    IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/include/libzmq.a
+)
+
 add_library(slsReceiverStatic STATIC
     ${SOURCES}
     ${HEADERS}
@@ -45,4 +51,6 @@ set_target_properties(slsReceiver PROPERTIES
 target_link_libraries(slsReceiver
     slsReceiverShared
     pthread
+    zmq
+    rt
 )
diff --git a/slsReceiverSoftware/src/UDPStandardImplementation.cpp b/slsReceiverSoftware/src/UDPStandardImplementation.cpp
index 22e9ef00c..b3b81318d 100644
--- a/slsReceiverSoftware/src/UDPStandardImplementation.cpp
+++ b/slsReceiverSoftware/src/UDPStandardImplementation.cpp
@@ -16,9 +16,10 @@
 #include <iostream>
 #include <string.h>
 #include <stdint.h>
-#include <ctime>
+#include <time.h>
 
 #include <zmq.h>	//zmq
+#include <sstream>
 
 using namespace std;
 
@@ -1669,7 +1670,7 @@ void UDPStandardImplementation::startDataCallback(){cprintf(MAGENTA,"start data
 
 	//set current thread value  index
 	int ithread = currentThreadIndex;
-
+	struct timespec begin,end;
 
     // server address to bind
     char hostName[100] = "tcp://127.0.0.1:";
@@ -1686,22 +1687,24 @@ void UDPStandardImplementation::startDataCallback(){cprintf(MAGENTA,"start data
 		memset(buffer,0xFF,oneframesize);
 		int bufferoffset = 0;
 		int size = 0;
-		int offset=0;
-		int currentfnum = 0;
+		int offset = 0;
+		int currentfnum = -1;
 		uint64_t fnum = 0;
 		uint32_t pnum = 0;
 
-		void *context = zmq_ctx_new();
-		// create a publisher
-		void *zmqsocket = zmq_socket(context, ZMQ_PUSH);
-		// bind
-		zmq_bind(zmqsocket,hostName);
+		bool randomSendNow = true;
 
+
+		void *context = zmq_ctx_new();
+		void *zmqsocket = zmq_socket(context, ZMQ_PUSH);		// create a publisher
+		zmq_bind(zmqsocket,hostName);		// bind
 		//let calling function know thread started and obtained current (after sockets created)
 		if(!zmqThreadStarted)
 			zmqThreadStarted = true;
 
-		currentfnum = -1;
+	    const char *type = "float64";
+	    const char *shape= "[1024, 512]";
+
 		/* inner loop - loop for each buffer */
 		//until mask reset (dummy pcaket got by writer)
 		while((1 << ithread) & dataCallbackThreadsMask){
@@ -1720,8 +1723,16 @@ void UDPStandardImplementation::startDataCallback(){cprintf(MAGENTA,"start data
 				/*if (checkJoinThread()){for different scans
 					break;
 				}*/
+				ostringstream header;
+			    header << "{\"htype\":[\"chunk-1.0\"], "
+			           << "\"type\":" << "\"" << type << "\", "
+			           << "\"shape\":" << shape
+			           << "}";
+			    //send header
+			    zmq_send(zmqsocket, header.str().c_str(), header.str().length(), ZMQ_SNDMORE);
+			    sleep(1);
+			    //send data
 				zmq_send (zmqsocket, "end", 3, 0);
-				//cprintf(BLUE,"sent done\n");
 
 				pthread_mutex_lock(&statusMutex);
 				dataCallbackThreadsMask^=(1<<ithread);
@@ -1729,10 +1740,25 @@ void UDPStandardImplementation::startDataCallback(){cprintf(MAGENTA,"start data
 				continue;
 			}
 
+			//random and the timer is on (randomSendNow is false)
+			if(!frameToGuiFrequency){
+				if(!randomSendNow){
+					clock_gettime(CLOCK_REALTIME, &end);
+#ifdef DEBUG
+					cprintf(BLUE,"%d Elapsed time:%f seconds\n",ithread,( end.tv_sec - begin.tv_sec )	+ ( end.tv_nsec - begin.tv_nsec ) / 1000000000.0);
+#endif
+					//still less than 250 ms, keep waiting
+					if((( end.tv_sec - begin.tv_sec )	+ ( end.tv_nsec - begin.tv_nsec ) / 1000000000.0) < 0.250)/**fixed 250 ms*/
+						continue;
+					//done with timer, look into data
+					randomSendNow = true;
+				}
+			}
 
 			size = guiNumPackets[ithread]*onePacketSize;
 			offset=0;
 
+			//copy packet by packet -getting rid of headers, -in the right order(padding missing packets)
 			while(offset < size){
 
 				//until getting frame number is not error
@@ -1753,7 +1779,24 @@ void UDPStandardImplementation::startDataCallback(){cprintf(MAGENTA,"start data
 				if(pnum == packetsPerFrame){
 					memcpy(buffer+((pnum-1)*oneDataSize), latestData[ithread]+offset+8,oneDataSize);
 					offset+= onePacketSize;
+					ostringstream header;
+				    header << "{\"htype\":[\"chunk-1.0\"], "
+				           << "\"type\":" << "\"" << type << "\", "
+				           << "\"shape\":" << shape
+				           << "}";
+				    //send header
+				    zmq_send(zmqsocket, header.str().c_str(), header.str().length(), ZMQ_SNDMORE);
+				    sleep(1);
+				    //send data
 					zmq_send(zmqsocket, buffer, oneframesize, 0);
+#ifdef DEBUG
+					cprintf(BLUE,"%d sent (last packet)\n",ithread);
+#endif
+					//start clock after sending
+					if(!frameToGuiFrequency){
+						randomSendNow = false;
+						clock_gettime(CLOCK_REALTIME, &begin);
+					}
 					memset(buffer,0xFF,oneframesize);
 					currentfnum = -1;
 				}
@@ -1761,7 +1804,24 @@ void UDPStandardImplementation::startDataCallback(){cprintf(MAGENTA,"start data
 				else {
 					//next frame
 					if(fnum > currentfnum){
+						ostringstream header;
+					    header << "{\"htype\":[\"chunk-1.0\"], "
+					           << "\"type\":" << "\"" << type << "\", "
+					           << "\"shape\":" << shape
+					           << "}";
+					    //send header
+					    zmq_send(zmqsocket, header.str().c_str(), header.str().length(), ZMQ_SNDMORE);
+					    sleep(1);
+					    //send data
 						zmq_send(zmqsocket, buffer, oneframesize, 0);
+#ifdef DEBUG
+					cprintf(BLUE,"%d sent (last packet)\n",ithread);
+#endif
+						//start clock after sending
+						if(!frameToGuiFrequency){
+							randomSendNow = false;
+							clock_gettime(CLOCK_REALTIME, &begin);
+						}
 						memset(buffer,0xFF,oneframesize);
 						currentfnum = fnum;
 					}