diff --git a/RELEASE.txt b/RELEASE.txt
index 4d51875b4..b606a0420 100755
--- a/RELEASE.txt
+++ b/RELEASE.txt
@@ -73,7 +73,8 @@ vetoalg
 vetostream
 serialnumber (put)
 dbitpipeline
-readnlines->partialread
+readnlines->readnrows
+serialnumber->moduleid
 
 setting number of udp interfaces from 1 to 2, didnt get image in gui 
 
diff --git a/python/src/detector.cpp b/python/src/detector.cpp
index 337630046..f34c141fd 100644
--- a/python/src/detector.cpp
+++ b/python/src/detector.cpp
@@ -73,9 +73,6 @@ void init_det(py::module &m) {
              (Result<int>(Detector::*)(sls::Positions) const) &
                  Detector::getModuleId,
              py::arg() = Positions{})
-        .def("setModuleId",
-             (void (Detector::*)(int, sls::Positions)) & Detector::setModuleId,
-             py::arg(), py::arg() = Positions{})
         .def("getReceiverVersion",
              (Result<int64_t>(Detector::*)(sls::Positions) const) &
                  Detector::getReceiverVersion,
diff --git a/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer b/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer
index 2399bd3b8..a46b62898 100755
Binary files a/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer and b/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer differ
diff --git a/slsDetectorServers/eigerDetectorServer/Beb.c b/slsDetectorServers/eigerDetectorServer/Beb.c
index caf0ec7b1..629d0ba44 100644
--- a/slsDetectorServers/eigerDetectorServer/Beb.c
+++ b/slsDetectorServers/eigerDetectorServer/Beb.c
@@ -127,44 +127,14 @@ int Beb_SetHeaderData(uint64_t src_mac, uint32_t src_ip, uint16_t src_port,
     uint32_t src_lsb = ((src_mac >> 0) & BIT32_MASK);
     memcpy(&(udp_header.src_mac[0]), &src_msb, sizeof(src_msb));
     memcpy(&(udp_header.src_mac[2]), &src_lsb, sizeof(src_lsb));
-    for (int i = 0; i < 6; ++i) {
-        LOG(logDEBUG1,
-            ("src mac[%d]: %02x\n", i, (uint8_t *)udp_header.src_mac[i]));
-    }
-
     memcpy(&(udp_header.src_ip[0]), &src_ip, sizeof(udp_header.src_ip));
-    for (int i = 0; i < 4; ++i) {
-        LOG(logDEBUG1,
-            ("src ip[%d]: %02x\n", i, (uint8_t *)udp_header.src_ip[i]));
-    }
-
     memcpy(&(udp_header.src_port[0]), &src_port, sizeof(udp_header.src_port));
-    for (int i = 0; i < 2; ++i) {
-        LOG(logDEBUG1,
-            ("src port[%d]: %02x\n", i, (uint8_t *)udp_header.src_port[i]));
-    }
-
-        uint32_t dst_msb = ((dst_mac >> 16) & BIT32_MASK);
-        uint16_t dst_lsb = ((dst_mac >> 0) & BIT16_MASK);
-        memcpy(&(udp_header.dst_mac[0]), &dst_msb, sizeof(dst_msb));
-        memcpy(&(udp_header.dst_mac[4]), &dst_lsb, sizeof(dst_lsb));
-        for (int i = 0; i < 6; ++i) {
-            LOG(logDEBUG1,
-                ("dst mac[%d]: %02x\n", i, (uint8_t *)udp_header.dst_mac[i]));
-        }
-
+    uint32_t dst_msb = ((dst_mac >> 16) & BIT32_MASK);
+    uint16_t dst_lsb = ((dst_mac >> 0) & BIT16_MASK);
+    memcpy(&(udp_header.dst_mac[0]), &dst_msb, sizeof(dst_msb));
+    memcpy(&(udp_header.dst_mac[4]), &dst_lsb, sizeof(dst_lsb));
     memcpy(&(udp_header.dst_ip[0]), &dst_ip, sizeof(udp_header.dst_ip));
-    for (int i = 0; i < 4; ++i) {
-        LOG(logDEBUG1,
-            ("dst ip[%d]: %02x\n", i, (uint8_t *)udp_header.dst_ip[i]));
-    }
-
-        memcpy(&(udp_header.dst_port[0]), &dst_port,
-               sizeof(udp_header.dst_port));
-        for (int i = 0; i < 2; ++i) {
-            LOG(logDEBUG1,
-                ("dst port[%d]: %02x\n", i, (uint8_t *)udp_header.dst_port[i]));
-        }
+    memcpy(&(udp_header.dst_port[0]), &dst_port, sizeof(udp_header.dst_port));
 
     Beb_AdjustIPChecksum(&udp_header);
 
@@ -1022,18 +992,19 @@ int Beb_GetBebFPGATemp() {
     return temperature;
 }
 
-void Beb_SetDetectorNumber(uint32_t detid) {
+int Beb_SetModuleId(uint32_t detid) {
     if (!Beb_activated)
-        return;
+        return OK;
 
     uint32_t swapid = Beb_swap_uint16(detid);
     // LOG(logINFO, "detector id %d swapped %d\n", detid, swapid));
     u_int32_t *csp0base = 0;
     int fd = Beb_open(&csp0base, XPAR_PLB_GPIO_TEST_BASEADDR);
     if (fd < 0) {
-        LOG(logERROR, ("Set Detector ID FAIL\n"));
-        return;
+        LOG(logERROR, ("Set module id FAIL\n"));
+        return FAIL;
     } else {
+        // left
         uint32_t value = Beb_Read32(csp0base, UDP_HEADER_A_LEFT_OFST);
         value &= UDP_HEADER_X_MSK; // to keep previous x value
         Beb_Write32(csp0base, UDP_HEADER_A_LEFT_OFST,
@@ -1042,8 +1013,11 @@ void Beb_SetDetectorNumber(uint32_t detid) {
         value = Beb_Read32(csp0base, UDP_HEADER_A_LEFT_OFST);
         if ((value & UDP_HEADER_ID_MSK) !=
             ((swapid << UDP_HEADER_ID_OFST) & UDP_HEADER_ID_MSK)) {
-            LOG(logERROR, ("Set Detector ID FAIL\n"));
+            LOG(logERROR, ("Set module id FAIL\n"));
+            Beb_close(fd, csp0base);
+            return FAIL;
         }
+        // right
         value = Beb_Read32(csp0base, UDP_HEADER_A_RIGHT_OFST);
         value &= UDP_HEADER_X_MSK; // to keep previous x value
         Beb_Write32(csp0base, UDP_HEADER_A_RIGHT_OFST,
@@ -1052,11 +1026,14 @@ void Beb_SetDetectorNumber(uint32_t detid) {
         value = Beb_Read32(csp0base, UDP_HEADER_A_RIGHT_OFST);
         if ((value & UDP_HEADER_ID_MSK) !=
             ((swapid << UDP_HEADER_ID_OFST) & UDP_HEADER_ID_MSK)) {
-            LOG(logERROR, ("Set Detector ID FAIL\n"));
+            LOG(logERROR, ("Set module id FAIL\n"));
+            Beb_close(fd, csp0base);
+            return FAIL;
         }
         Beb_close(fd, csp0base);
     }
-    LOG(logINFO, ("Detector id %d set in UDP Header\n\n", detid));
+    LOG(logINFO, ("Module id %d set in UDP Header\n\n", detid));
+    return OK;
 }
 
 int Beb_SetQuad(int value) {
diff --git a/slsDetectorServers/eigerDetectorServer/Beb.h b/slsDetectorServers/eigerDetectorServer/Beb.h
index 152db2dd5..c4449b540 100644
--- a/slsDetectorServers/eigerDetectorServer/Beb.h
+++ b/slsDetectorServers/eigerDetectorServer/Beb.h
@@ -42,14 +42,14 @@ int Beb_StopAcquisition();
 int Beb_RequestNImages(int ten_gig, unsigned int nimages,
                        int test_just_send_out_packets_no_wait);
 int Beb_GetBebFPGATemp();
-void Beb_SetDetectorNumber(uint32_t detid);
+int Beb_SetModuleId(uint32_t detid);
 int Beb_SetQuad(int value);
 int Beb_GetQuad();
 int *Beb_GetDetectorPosition();
 int Beb_SetDetectorPosition(int pos[]);
 int Beb_SetNextFrameNumber(uint64_t value);
 int Beb_GetNextFrameNumber(uint64_t *retval, int tengigaEnable);
-void Beb_SetPartialReadout(int value);
+void Beb_SetReadNRows(int value);
 int Beb_GetNumberofDestinations(int *retval);
 int Beb_SetNumberofDestinations(int value);
 
diff --git a/slsDetectorServers/eigerDetectorServer/CMakeLists.txt b/slsDetectorServers/eigerDetectorServer/CMakeLists.txt
index e663d4569..a0f660f2e 100644
--- a/slsDetectorServers/eigerDetectorServer/CMakeLists.txt
+++ b/slsDetectorServers/eigerDetectorServer/CMakeLists.txt
@@ -100,3 +100,4 @@ install(TARGETS eigerDetectorServerSlaveBottom_virtual
 
 
 configure_file(config_eiger.txt ${CMAKE_BINARY_DIR}/bin/config_eiger.txt COPYONLY)
+configure_file(detid_eiger.txt ${CMAKE_BINARY_DIR}/bin/detid_eiger.txt COPYONLY)
diff --git a/slsDetectorServers/eigerDetectorServer/FebControl.c b/slsDetectorServers/eigerDetectorServer/FebControl.c
index f44c768b6..6ca0b85ae 100644
--- a/slsDetectorServers/eigerDetectorServer/FebControl.c
+++ b/slsDetectorServers/eigerDetectorServer/FebControl.c
@@ -57,7 +57,7 @@ void Feb_Control_FebControl() {
         malloc(Feb_Control_trimbit_size * sizeof(int));
 }
 
-int Feb_Control_Init(int master, int normal, int module_num) {
+int Feb_Control_Init(int master, int normal) {
     Feb_Control_master = master;
     Feb_Control_normal = normal;
     Feb_Interface_SetAddress(Feb_Control_rightAddress, Feb_Control_leftAddress);
diff --git a/slsDetectorServers/eigerDetectorServer/FebControl.h b/slsDetectorServers/eigerDetectorServer/FebControl.h
index 14f1fb731..d600a6ca8 100644
--- a/slsDetectorServers/eigerDetectorServer/FebControl.h
+++ b/slsDetectorServers/eigerDetectorServer/FebControl.h
@@ -6,7 +6,7 @@
 // setup
 void Feb_Control_activate(int activate);
 void Feb_Control_FebControl();
-int Feb_Control_Init(int master, int normal, int module_num);
+int Feb_Control_Init(int master, int normal);
 int Feb_Control_OpenSerialCommunication();
 void Feb_Control_CloseSerialCommunication();
 int Feb_Control_CheckSetup();
diff --git a/slsDetectorServers/eigerDetectorServer/Makefile b/slsDetectorServers/eigerDetectorServer/Makefile
index 04370b148..10b0793ff 100755
--- a/slsDetectorServers/eigerDetectorServer/Makefile
+++ b/slsDetectorServers/eigerDetectorServer/Makefile
@@ -34,6 +34,7 @@ $(PROGS):  $(OBJS)
 	$(CC)  	-o $@  $^ $(CFLAGS) $(LDLIBS) 
 	mv $(PROGS) $(DESTDIR)
 	cp config_eiger.txt $(DESTDIR)
+	cp detid.txt $(DESTDIR)
 	
 
 hv9m_blackfin_server:9mhvserial_bf.c
diff --git a/slsDetectorServers/eigerDetectorServer/bin/eigerDetectorServer_developer b/slsDetectorServers/eigerDetectorServer/bin/eigerDetectorServer_developer
index fd354a1d6..808f51423 100755
Binary files a/slsDetectorServers/eigerDetectorServer/bin/eigerDetectorServer_developer and b/slsDetectorServers/eigerDetectorServer/bin/eigerDetectorServer_developer differ
diff --git a/slsDetectorServers/eigerDetectorServer/detid.txt b/slsDetectorServers/eigerDetectorServer/detid.txt
new file mode 100755
index 000000000..b21aaed88
--- /dev/null
+++ b/slsDetectorServers/eigerDetectorServer/detid.txt
@@ -0,0 +1 @@
+beb001
\ No newline at end of file
diff --git a/slsDetectorServers/eigerDetectorServer/detid_eiger.txt b/slsDetectorServers/eigerDetectorServer/detid_eiger.txt
new file mode 100755
index 000000000..b21aaed88
--- /dev/null
+++ b/slsDetectorServers/eigerDetectorServer/detid_eiger.txt
@@ -0,0 +1 @@
+beb001
\ No newline at end of file
diff --git a/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
index 91f481ab2..eb44e5aaa 100644
--- a/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
@@ -46,9 +46,6 @@ unsigned int nimages_per_request = 1;
 int top = 0;
 int master = 0;
 int normal = 0;
-#ifndef VIRTUAL
-uint32_t detid = 0;
-#endif
 
 int eiger_highvoltage = 0;
 int eiger_theo_highvoltage = 0;
@@ -222,25 +219,8 @@ u_int64_t getFirmwareAPIVersion() {
 #endif
 }
 
-void readDetectorNumber() {
-#ifndef VIRTUAL
-    char output[255];
-    FILE *sysFile = popen(IDFILECOMMAND, "r");
-    fgets(output, sizeof(output), sysFile);
-    pclose(sysFile);
-    sscanf(output, "%u", &detid);
-    if (isControlServer) {
-        LOG(logINFOBLUE, ("Detector ID: %u\n", detid));
-    }
-#endif
-}
-
-u_int32_t getDetectorNumber() {
-#ifdef VIRTUAL
-    return 0;
-#else
-    return detid;
-#endif
+int getModuleId(int *ret, char *mess) {
+    return getModuleIdInFile(ret, mess, ID_FILE);
 }
 
 u_int64_t getDetectorMAC() {
@@ -322,7 +302,14 @@ u_int32_t getDetectorIP() {
 void initControlServer() {
     LOG(logINFOBLUE, ("Configuring Control server\n"));
     if (!updateFlag && initError == OK) {
-        readDetectorNumber();
+#ifndef VIRTUAL
+        int modid = getModuleIdInFile(&initError, initErrorMessage, ID_FILE);
+#else
+        getModuleIdInFile(&initError, initErrorMessage, ID_FILE);
+#endif
+        if (initError == FAIL) {
+            return;
+        }
         getModuleConfiguration();
 #ifndef VIRTUAL
         sharedMemory_lockLocalLink();
@@ -330,7 +317,7 @@ void initControlServer() {
         Feb_Interface_FebInterface();
         Feb_Control_FebControl();
         // same addresses for top and bottom
-        if (!Feb_Control_Init(master, normal, getDetectorNumber())) {
+        if (!Feb_Control_Init(master, normal)) {
             initError = FAIL;
             sprintf(initErrorMessage, "Could not intitalize feb control\n");
             LOG(logERROR, (initErrorMessage));
@@ -355,7 +342,7 @@ void initControlServer() {
         LOG(logDEBUG1, ("Control server: FEB Initialization done\n"));
         Beb_SetTopVariable(top);
         Beb_Beb();
-        Beb_SetDetectorNumber(getDetectorNumber());
+        Beb_SetModuleId(modid);
         LOG(logDEBUG1, ("Control server: BEB Initialization done\n"));
 #endif
         // also reads config file and deactivates
@@ -376,14 +363,13 @@ void initStopServer() {
     usleep(WAIT_STOP_SERVER_START);
     LOG(logINFOBLUE, ("Configuring Stop server\n"));
     // exit(-1);
-    readDetectorNumber();
     getModuleConfiguration();
     sharedMemory_lockLocalLink();
     Feb_Control_SetMasterVariable(master);
     Feb_Interface_FebInterface();
     Feb_Control_FebControl();
     // same addresses for top and bottom
-    Feb_Control_Init(master, normal, getDetectorNumber());
+    Feb_Control_Init(master, normal);
     sharedMemory_unlockLocalLink();
     LOG(logDEBUG1, ("Stop server: FEB Initialization done\n"));
 #endif
diff --git a/slsDetectorServers/eigerDetectorServer/slsDetectorServer_defs.h b/slsDetectorServers/eigerDetectorServer/slsDetectorServer_defs.h
index 9a9d9bdce..125891d14 100644
--- a/slsDetectorServers/eigerDetectorServer/slsDetectorServer_defs.h
+++ b/slsDetectorServers/eigerDetectorServer/slsDetectorServer_defs.h
@@ -2,7 +2,13 @@
 #include "sls/sls_detector_defs.h"
 
 #define REQUIRED_FIRMWARE_VERSION (27)
-#define IDFILECOMMAND             "more /home/root/executables/detid.txt"
+// virtual ones renamed for consistency
+// real ones keep previous name for compatibility (already in production)
+#ifdef VIRTUAL
+#define ID_FILE "detid_eiger.txt"
+#else
+#define ID_FILE "detid.txt"
+#endif
 #define CONFIG_FILE               ("config_eiger.txt")
 #define WAIT_STOP_SERVER_START    (1 * 1000 * 1000)
 
diff --git a/slsDetectorServers/gotthard2DetectorServer/CMakeLists.txt b/slsDetectorServers/gotthard2DetectorServer/CMakeLists.txt
index 6fbb6a8d1..9cebb9e9f 100644
--- a/slsDetectorServers/gotthard2DetectorServer/CMakeLists.txt
+++ b/slsDetectorServers/gotthard2DetectorServer/CMakeLists.txt
@@ -40,3 +40,4 @@ install(TARGETS gotthard2DetectorServer_virtual
 )
 
 configure_file(config_gotthard2.txt ${CMAKE_BINARY_DIR}/bin/config_gotthard2.txt COPYONLY)
+configure_file(detid_gotthard2.txt ${CMAKE_BINARY_DIR}/bin/detid_gotthard2.txt COPYONLY)
diff --git a/slsDetectorServers/gotthard2DetectorServer/Makefile b/slsDetectorServers/gotthard2DetectorServer/Makefile
index 000d778bb..1238ad467 100755
--- a/slsDetectorServers/gotthard2DetectorServer/Makefile
+++ b/slsDetectorServers/gotthard2DetectorServer/Makefile
@@ -33,6 +33,7 @@ $(PROGS): $(OBJS)
 	$(CC) -o $@ $^ $(CFLAGS)  $(LDLIBS)  
 	mv $(PROGS) $(DESTDIR)
 	cp config_gotthard2.txt $(DESTDIR)
+	cp detid_gotthard2.txt $(DESTDIR)
 	rm $(main_src)*.o	
 
 clean:
diff --git a/slsDetectorServers/gotthard2DetectorServer/RegisterDefs.h b/slsDetectorServers/gotthard2DetectorServer/RegisterDefs.h
index 009a8d1eb..4da6dea3f 100644
--- a/slsDetectorServers/gotthard2DetectorServer/RegisterDefs.h
+++ b/slsDetectorServers/gotthard2DetectorServer/RegisterDefs.h
@@ -127,7 +127,6 @@
 
 #define MOD_ID_OFST                         (0)
 #define MOD_ID_MSK                          (0x0000FFFF << MOD_ID_OFST)
-#define MOD_MAX_VAL                         (0xFFFF)
 
 /* ASIC registers --------------------------------------------------*/
 
diff --git a/slsDetectorServers/gotthard2DetectorServer/bin/gotthard2DetectorServer_developer b/slsDetectorServers/gotthard2DetectorServer/bin/gotthard2DetectorServer_developer
index 6eb954320..c3de81e50 100755
Binary files a/slsDetectorServers/gotthard2DetectorServer/bin/gotthard2DetectorServer_developer and b/slsDetectorServers/gotthard2DetectorServer/bin/gotthard2DetectorServer_developer differ
diff --git a/slsDetectorServers/gotthard2DetectorServer/detid_gotthard2.txt b/slsDetectorServers/gotthard2DetectorServer/detid_gotthard2.txt
new file mode 100755
index 000000000..274c0052d
--- /dev/null
+++ b/slsDetectorServers/gotthard2DetectorServer/detid_gotthard2.txt
@@ -0,0 +1 @@
+1234
\ No newline at end of file
diff --git a/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c
index 127dc370f..8c45ae8ed 100644
--- a/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c
@@ -287,15 +287,15 @@ u_int32_t getDetectorNumber() {
     return bus_r(MCB_SERIAL_NO_REG);
 }
 
-int getModuleId() { return ((bus_r(MOD_ID_REG) & MOD_ID_MSK) >> MOD_ID_OFST); }
-
-void setModuleId(int arg) {
-    LOG(logINFOBLUE, ("Setting Module Id to 0x%x\n", arg));
-    bus_w(MOD_ID_REG, bus_r(MOD_ID_REG) & ~MOD_ID_MSK);
-    bus_w(MOD_ID_REG, bus_r(MOD_ID_REG) | ((arg << MOD_ID_OFST) & MOD_ID_MSK));
+int getModuleId(int *ret, char *mess) {
+    return ((bus_r(MOD_ID_REG) & ~MOD_ID_MSK) >> MOD_ID_OFST);
 }
 
-int getMaxModuleId() { return MOD_MAX_VAL; }
+void setModuleId(int modid) {
+    LOG(logINFOBLUE, ("Setting module id in fpga: %d\n", modid))
+    bus_w(MOD_ID_REG, bus_r(MOD_ID_REG) & ~MOD_ID_MSK);
+    bus_w(MOD_ID_REG, bus_r(MOD_ID_REG) | ((modid << MOD_ID_OFST) & MOD_ID_MSK));
+}
 
 u_int64_t getDetectorMAC() {
 #ifdef VIRTUAL
@@ -419,7 +419,6 @@ void setupDetector() {
     sharedMemory_setStatus(IDLE);
     setupUDPCommParameters();
 #endif
-
     // pll defines
     ALTERA_PLL_C10_SetDefines(REG_OFFSET, BASE_READOUT_PLL, BASE_SYSTEM_PLL,
                               PLL_RESET_REG, PLL_RESET_READOUT_MSK,
@@ -477,6 +476,14 @@ void setupDetector() {
     if (readConfigFile() == FAIL) {
         return;
     }
+
+    // set module id in register
+    int modid = getModuleIdInFile(&initError, initErrorMessage, ID_FILE);
+    if (initError == FAIL) {
+        return;
+    }
+    setModuleId(modid);
+
     setBurstMode(DEFAULT_BURST_MODE);
     setFilterResistor(DEFAULT_FILTER_RESISTOR);
     setCDSGain(DEFAILT_CDS_GAIN);
diff --git a/slsDetectorServers/gotthard2DetectorServer/slsDetectorServer_defs.h b/slsDetectorServers/gotthard2DetectorServer/slsDetectorServer_defs.h
index 3cba7b4fd..2cc45638f 100644
--- a/slsDetectorServers/gotthard2DetectorServer/slsDetectorServer_defs.h
+++ b/slsDetectorServers/gotthard2DetectorServer/slsDetectorServer_defs.h
@@ -3,6 +3,7 @@
 
 #define REQRD_FRMWRE_VRSN (0x210527)
 #define KERNEL_DATE_VRSN  "Wed May 20 13:58:38 CEST 2020"
+#define ID_FILE           "detid_gotthard2.txt"
 
 #define CTRL_SRVR_INIT_TIME_US (300 * 1000)
 
diff --git a/slsDetectorServers/gotthardDetectorServer/bin/gotthardDetectorServer_developer b/slsDetectorServers/gotthardDetectorServer/bin/gotthardDetectorServer_developer
index a28d141a0..94c0a4721 100755
Binary files a/slsDetectorServers/gotthardDetectorServer/bin/gotthardDetectorServer_developer and b/slsDetectorServers/gotthardDetectorServer/bin/gotthardDetectorServer_developer differ
diff --git a/slsDetectorServers/jungfrauDetectorServer/bin/jungfrauDetectorServer_developer b/slsDetectorServers/jungfrauDetectorServer/bin/jungfrauDetectorServer_developer
index ea5a9c819..3b7140044 100755
Binary files a/slsDetectorServers/jungfrauDetectorServer/bin/jungfrauDetectorServer_developer and b/slsDetectorServers/jungfrauDetectorServer/bin/jungfrauDetectorServer_developer differ
diff --git a/slsDetectorServers/moenchDetectorServer/bin/moenchDetectorServer_developer b/slsDetectorServers/moenchDetectorServer/bin/moenchDetectorServer_developer
index 944552b2a..6859be991 100755
Binary files a/slsDetectorServers/moenchDetectorServer/bin/moenchDetectorServer_developer and b/slsDetectorServers/moenchDetectorServer/bin/moenchDetectorServer_developer differ
diff --git a/slsDetectorServers/mythen3DetectorServer/CMakeLists.txt b/slsDetectorServers/mythen3DetectorServer/CMakeLists.txt
index 20476adfb..ea43df079 100644
--- a/slsDetectorServers/mythen3DetectorServer/CMakeLists.txt
+++ b/slsDetectorServers/mythen3DetectorServer/CMakeLists.txt
@@ -41,4 +41,5 @@ install(TARGETS mythen3DetectorServer_virtual
     RUNTIME  DESTINATION ${CMAKE_INSTALL_BINDIR}
 )
 
-configure_file(DefaultPattern_mythen3.txt ${CMAKE_BINARY_DIR}/bin/DefaultPattern_mythen3.txt COPYONLY)
\ No newline at end of file
+configure_file(DefaultPattern_mythen3.txt ${CMAKE_BINARY_DIR}/bin/DefaultPattern_mythen3.txt COPYONLY)
+configure_file(detid_mythen3.txt ${CMAKE_BINARY_DIR}/bin/detid_mythen3.txt COPYONLY)
diff --git a/slsDetectorServers/mythen3DetectorServer/Makefile b/slsDetectorServers/mythen3DetectorServer/Makefile
index 254fbd570..9c6c8827b 100755
--- a/slsDetectorServers/mythen3DetectorServer/Makefile
+++ b/slsDetectorServers/mythen3DetectorServer/Makefile
@@ -34,6 +34,7 @@ $(PROGS): $(OBJS)
 	$(CC) -o $@ $^ $(CFLAGS)  $(LDLIBS)  
 	mv $(PROGS) $(DESTDIR)
 	cp DefaultPattern_mythen3.txt $(DESTDIR)
+	cp detid_mythen3.txt $(DESTDIR)
 	rm $(main_src)*.o
 
 clean:
diff --git a/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer b/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer
index 883084b96..3c4cc76a8 100755
Binary files a/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer and b/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer differ
diff --git a/slsDetectorServers/mythen3DetectorServer/detid_mythen3.txt b/slsDetectorServers/mythen3DetectorServer/detid_mythen3.txt
new file mode 100755
index 000000000..274c0052d
--- /dev/null
+++ b/slsDetectorServers/mythen3DetectorServer/detid_mythen3.txt
@@ -0,0 +1 @@
+1234
\ No newline at end of file
diff --git a/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
index 9180efeef..3d8c99b13 100644
--- a/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
@@ -274,28 +274,17 @@ u_int16_t getHardwareVersionNumber() {
             MCB_SERIAL_NO_VRSN_OFST);
 }
 
-void readDetectorNumber() {
-#ifndef VIRTUAL
-    if (initError == FAIL) {
-        return;
-    }
-    FILE *fd = fopen(ID_FILE, "r");
-    if (fd == NULL) {
-        sprintf(initErrorMessage, "No %s file found.\n", ID_FILE);
-        LOG(logERROR, ("%s\n\n", initErrorMessage));
-        initError = FAIL;
-        return;
-    }
-    char output[255];
-    fgets(output, sizeof(output), fd);
-    sscanf(output, "%u", &detID);
-    if (isControlServer) {
-        LOG(logINFOBLUE, ("Detector ID: %u\n", detID));
-    }
+u_int32_t getDetectorNumber() {
+#ifdef VIRTUAL
+    return 0;
 #endif
+    return bus_r(MCB_SERIAL_NO_REG);
 }
 
-u_int32_t getDetectorNumber() { return detID; }
+
+int getModuleId(int *ret, char *mess) {
+    return getModuleIdInFile(ret, mess, ID_FILE);
+}
 
 u_int64_t getDetectorMAC() {
 #ifdef VIRTUAL
@@ -455,6 +444,14 @@ void setupDetector() {
     setASICDefaults();
     setADIFDefaults();
 
+    // set module id in register
+    getModuleIdInFile(&initError, initErrorMessage, ID_FILE);
+    if (initError == FAIL) {
+        return;
+    }
+    // until firmware is done
+    // setModuleId(modid);    
+
     // set trigger flow for m3 (for all timing modes)
     bus_w(FLOW_TRIGGER_REG, bus_r(FLOW_TRIGGER_REG) | FLOW_TRIGGER_MSK);
 
@@ -481,7 +478,7 @@ void setupDetector() {
 #ifdef VIRTUAL
     enableTenGigabitEthernet(0);
 #endif
-    readDetectorNumber();
+    getModuleIdInFile(&initError, initErrorMessage, ID_FILE);
     if (initError == FAIL) {
         return;
     }
diff --git a/slsDetectorServers/slsDetectorServer/include/common.h b/slsDetectorServers/slsDetectorServer/include/common.h
index cc7daf7e5..d0beaca28 100644
--- a/slsDetectorServers/slsDetectorServer/include/common.h
+++ b/slsDetectorServers/slsDetectorServer/include/common.h
@@ -28,3 +28,6 @@ void validate(int *ret, char *mess, int arg, int retval, char *modename,
               enum numberMode nummode);
 void validate64(int *ret, char *mess, int64_t arg, int64_t retval,
                 char *modename, enum numberMode nummode);
+
+int getModuleIdInFile(int *ret, char *mess, char *fileName);
+int setModuleIdInFile(char *mess, int arg, char *fileName);
\ No newline at end of file
diff --git a/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h b/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
index b82fc59d4..8614e7672 100644
--- a/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
+++ b/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
@@ -90,14 +90,14 @@ u_int16_t getHardwareSerialNumber();
 int isHardwareVersion2();
 int getChipVersion();
 #endif
-#if defined(EIGERD) || defined(MYTHEN3D)
-void readDetectorNumber();
-#endif
+#ifndef EIGERD
 u_int32_t getDetectorNumber();
+#endif
+#if defined(GOTTHARD2D) || defined(EIGERD) || defined(MYTHEN3D)
+int getModuleId(int *ret, char *mess);
+#endif
 #ifdef GOTTHARD2D
-int getModuleId();
-void setModuleId(int arg);
-int getMaxModuleId();
+void setModuleId(int modid);
 #endif
 u_int64_t getDetectorMAC();
 u_int32_t getDetectorIP();
diff --git a/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h b/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
index 521b56ba3..da20ee922 100644
--- a/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
+++ b/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
@@ -268,7 +268,6 @@ int get_adc_pipeline(int);
 int set_dbit_pipeline(int);
 int get_dbit_pipeline(int);
 int get_module_id(int);
-int set_module_id(int);
 int get_dest_udp_list(int);
 int set_dest_udp_list(int);
 int get_num_dest_list(int);
diff --git a/slsDetectorServers/slsDetectorServer/src/common.c b/slsDetectorServers/slsDetectorServer/src/common.c
index bb5dfbfbc..08a172d06 100644
--- a/slsDetectorServers/slsDetectorServer/src/common.c
+++ b/slsDetectorServers/slsDetectorServer/src/common.c
@@ -7,9 +7,6 @@
 #include <string.h>
 #include <unistd.h> // readlink
 
-extern int ret;
-extern char mess[MAX_STR_LENGTH];
-
 int ConvertToDifferentRange(int inputMin, int inputMax, int outputMin,
                             int outputMax, int inputValue, int *outputValue) {
     LOG(logDEBUG1, (" Input Value: %d (Input:(%d - %d), Output:(%d - %d))\n",
@@ -102,4 +99,82 @@ void validate64(int *ret, char *mess, int64_t arg, int64_t retval,
                     (long long unsigned int)retval);
         LOG(logERROR, (mess));
     }
-}
\ No newline at end of file
+}
+
+int getModuleIdInFile(int *ret, char *mess, char *fileName) {
+    const int fileNameSize = 128;
+    char fname[fileNameSize];
+    if (getAbsPath(fname, fileNameSize, fileName) == FAIL) {
+        *ret = FAIL;
+        strcpy(mess, "Could not find detid file\n");
+        LOG(logERROR, ("%s\n\n", mess));
+        return -1;
+    }
+
+    // open id file
+    FILE *fd = fopen(fname, "r");
+    if (fd == NULL) {
+        *ret = FAIL;
+        strcpy(mess, "Could not find detid file\n");
+        LOG(logERROR, ("%s\n\n", mess));
+        return -1;
+    }
+    LOG(logDEBUG1, ("Reading det id file %s\n", fileName));
+
+    // read line
+    const size_t len = 256;
+    char line[len];
+    memset(line, 0, len);
+    if (NULL == fgets(line, len, fd)) {
+        *ret = FAIL;
+        strcpy(mess, "Could not find detid file\n");
+        LOG(logERROR, ("%s\n\n", mess));
+        return -1;
+    }
+    // read id
+    int retval = 0;
+    if (sscanf(line, "%x", &retval) != 1) {
+        *ret = FAIL;
+        sprintf(mess,
+                "Could not scan det id from on-board server "
+                "id file. Line:[%s].\n",
+                line);
+        LOG(logERROR, ("%s\n\n", mess));
+        return -1;
+    }
+    LOG(logINFOBLUE, ("Module Id: 0x%x (File)\n", retval));
+    return retval;
+}
+
+int setModuleIdInFile(char *mess, int arg, char *fileName) {
+    LOG(logINFOBLUE, ("Setting Module Id: 0x%x (File)\n", arg));
+
+    const int fileNameSize = 128;
+    char fname[fileNameSize];
+    if (getAbsPath(fname, fileNameSize, fileName) == FAIL) {
+        strcpy(mess, "Could not find detid file\n");
+        LOG(logERROR, (mess));
+        return FAIL;
+    }
+
+    // open id file
+    FILE *fd = fopen(fname, "r");
+    if (fd == NULL) {
+        strcpy(mess, "Could not find detid file\n");
+        LOG(logERROR, (mess));
+        return FAIL;
+    }
+    LOG(logDEBUG1, ("Writing det id to file %s\n", fileName));
+
+    // write id
+    const size_t len = 256;
+    char line[len];
+    memset(line, 0, len);
+    sprintf(line, "%x", arg);
+    if (EOF == fputs(line, fd)) {
+        strcpy(mess, "Could not write to detid file\n");
+        LOG(logERROR, (mess));
+        return FAIL;
+    }
+    return OK;
+}
diff --git a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
index bbb4e5037..9a01cd4ea 100644
--- a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
+++ b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
@@ -404,7 +404,6 @@ void function_table() {
     flist[F_SET_DBIT_PIPELINE] = &set_dbit_pipeline;
     flist[F_GET_DBIT_PIPELINE] = &get_dbit_pipeline;
     flist[F_GET_MODULE_ID] = &get_module_id;
-    flist[F_SET_MODULE_ID] = &set_module_id;
     flist[F_GET_DEST_UDP_LIST] = &get_dest_udp_list;
     flist[F_SET_DEST_UDP_LIST] = &set_dest_udp_list;
     flist[F_GET_NUM_DEST_UDP] = &get_num_dest_list;
@@ -684,8 +683,12 @@ int get_serial_number(int file_des) {
     ret = OK;
     memset(mess, 0, sizeof(mess));
     int64_t retval = -1;
+#ifdef EIGERD
+    functionNotImplemented();
+#else
     retval = getDetectorNumber();
     LOG(logDEBUG1, ("detector number retval: 0x%llx\n", (long long int)retval));
+#endif
     return Server_SendResult(file_des, INT64, &retval, sizeof(retval));
 }
 
@@ -9016,40 +9019,13 @@ int get_module_id(int file_des) {
     ret = OK;
     memset(mess, 0, sizeof(mess));
     int retval = -1;
-#ifndef GOTTHARD2D
+#if !(defined(GOTTHARD2D) || defined(EIGERD) || defined(MYTHEN3D))
     functionNotImplemented();
 #else
-    retval = getModuleId();
-#endif
+    retval = getModuleId(&ret, mess);
     LOG(logDEBUG1, ("module id retval: 0x%x\n", retval));
-    return Server_SendResult(file_des, INT32, &retval, sizeof(retval));
-}
-
-int set_module_id(int file_des) {
-    ret = OK;
-    memset(mess, 0, sizeof(mess));
-    int arg = -1;
-
-    if (receiveData(file_des, &arg, sizeof(arg), INT32) < 0)
-        return printSocketReadError();
-    LOG(logDEBUG1, ("Setting module id to 0x%x\n", arg));
-
-#ifndef GOTTHARD2D
-    functionNotImplemented();
-#else
-    if (arg > getMaxModuleId()) {
-        ret = FAIL;
-        sprintf(mess, "Could not set module id. Max value: 0x%x\n",
-                getMaxModuleId());
-        LOG(logERROR, (mess));
-    } else {
-        setModuleId(arg);
-        int retval = getModuleId();
-        LOG(logDEBUG1, ("retval module id: %d\n", retval));
-        validate(&ret, mess, arg, retval, "set module id", DEC);
-    }
 #endif
-    return Server_SendResult(file_des, INT32, NULL, 0);
+    return Server_SendResult(file_des, INT32, &retval, sizeof(retval));
 }
 
 int get_dest_udp_list(int file_des) {
diff --git a/slsDetectorSoftware/include/sls/Detector.h b/slsDetectorSoftware/include/sls/Detector.h
index 90d197165..420f605de 100644
--- a/slsDetectorSoftware/include/sls/Detector.h
+++ b/slsDetectorSoftware/include/sls/Detector.h
@@ -78,15 +78,12 @@ class Detector {
 
     Result<int64_t> getDetectorServerVersion(Positions pos = {}) const;
 
+    /* [Jungfrau][Gotthard][Mythen3][Gotthard2][CTB][Moench] */
     Result<int64_t> getSerialNumber(Positions pos = {}) const;
 
-    /** [Gotthard2] */
+    /** [Eiger][Gotthard2][Mythen3] 6 bit value (ideally unique) that is streamed out in the UDP header of the detector.*/
     Result<int> getModuleId(Positions pos = {}) const;
 
-    /** [Gotthard2] 6 bit value (ideally unique) that is "
-        "streamed out1 in the UDP header of the detector. Default is 0. */
-    void setModuleId(const int value, Positions pos = {});
-
     Result<int64_t> getReceiverVersion(Positions pos = {}) const;
 
     /** Options: EIGER, JUNGFRAU, GOTTHARD, MOENCH, MYTHEN3, GOTTHARD2,
diff --git a/slsDetectorSoftware/src/CmdProxy.h b/slsDetectorSoftware/src/CmdProxy.h
index 3e6de1e8d..e2834d957 100644
--- a/slsDetectorSoftware/src/CmdProxy.h
+++ b/slsDetectorSoftware/src/CmdProxy.h
@@ -1200,12 +1200,13 @@ class CmdProxy {
                     "\n\tReceiver version in format [0xYYMMDD].");
 
     GET_COMMAND_HEX(serialnumber, getSerialNumber,
-                    "\n\tSerial number of detector.");
+                    "\n\t[Jungfrau][Gotthard][Mythen3][Gotthard2][CTB][Moench]"
+                    "Serial number of detector.");
 
-    INTEGER_COMMAND_HEX(
-        moduleid, getModuleId, setModuleId, StringTo<int>,
-        "[value]\n\t[Gotthard2] 16 bit value (ideally unique) that is "
-        "streamed out in the UDP header of the detector. Default is 0.");
+    GET_COMMAND_HEX(
+        moduleid, getModuleId, 
+        "\n\t[Gotthard2][Eiger][Mythen3] 16 bit value (ideally unique) "
+        "that is streamed out in the UDP header of the detector. Picked up from a file on the module.");
 
     GET_COMMAND(type, getDetectorType,
                 "\n\tReturns detector type. Can be Eiger, Jungfrau, Gotthard, "
diff --git a/slsDetectorSoftware/src/Detector.cpp b/slsDetectorSoftware/src/Detector.cpp
index eb752baa4..80c6c0c0e 100644
--- a/slsDetectorSoftware/src/Detector.cpp
+++ b/slsDetectorSoftware/src/Detector.cpp
@@ -123,10 +123,6 @@ Result<int> Detector::getModuleId(Positions pos) const {
     return pimpl->Parallel(&Module::getModuleId, pos);
 }
 
-void Detector::setModuleId(const int value, Positions pos) {
-    pimpl->Parallel(&Module::setModuleId, pos, value);
-}
-
 Result<int64_t> Detector::getReceiverVersion(Positions pos) const {
     return pimpl->Parallel(&Module::getReceiverSoftwareVersion, pos);
 }
diff --git a/slsDetectorSoftware/src/Module.cpp b/slsDetectorSoftware/src/Module.cpp
index f780d8fc9..bdda7310e 100644
--- a/slsDetectorSoftware/src/Module.cpp
+++ b/slsDetectorSoftware/src/Module.cpp
@@ -25,8 +25,8 @@
 namespace sls {
 
 // creating new shm
-Module::Module(detectorType type, int det_id, int module_id, bool verify)
-    : moduleId(module_id), shm(det_id, module_id) {
+Module::Module(detectorType type, int det_id, int module_index, bool verify)
+    : moduleIndex(module_index), shm(det_id, module_index) {
 
     // ensure shared memory was not created before
     if (shm.IsExisting()) {
@@ -40,8 +40,8 @@ Module::Module(detectorType type, int det_id, int module_id, bool verify)
 }
 
 // opening existing shm
-Module::Module(int det_id, int module_id, bool verify)
-    : moduleId(module_id), shm(det_id, module_id) {
+Module::Module(int det_id, int module_index, bool verify)
+    : moduleIndex(module_index), shm(det_id, module_index) {
 
     // getDetectorType From shm will check if existing
     detectorType type = getDetectorTypeFromShm(det_id, verify);
@@ -96,10 +96,6 @@ int64_t Module::getSerialNumber() const {
 
 int Module::getModuleId() const { return sendToDetector<int>(F_GET_MODULE_ID); }
 
-void Module::setModuleId(const int value) {
-    return sendToDetector(F_SET_MODULE_ID, value, nullptr);
-}
-
 int64_t Module::getReceiverSoftwareVersion() const {
     if (shm()->useReceiverFlag) {
         return sendToReceiver<int64_t>(F_GET_RECEIVER_VERSION);
@@ -142,7 +138,7 @@ slsDetectorDefs::xy Module::getNumberOfChannels() const {
 
 void Module::updateNumberOfDetector(slsDetectorDefs::xy det) {
     shm()->numberOfDetector = det;
-    int args[2] = {shm()->numberOfDetector.y, moduleId};
+    int args[2] = {shm()->numberOfDetector.y, moduleIndex};
     sendToDetector(F_SET_POSITION, args, nullptr);
 }
 
@@ -416,14 +412,14 @@ void Module::loadSettingsFile(const std::string &fname) {
     if (shm()->myDetectorType == EIGER || shm()->myDetectorType == MYTHEN3) {
         std::ostringstream ostfn;
         ostfn << fname;
-        int serialNumberWidth = 3;
+        int moduleIdWidth = 3;
         if (shm()->myDetectorType == MYTHEN3) {
-            serialNumberWidth = 4;
+            moduleIdWidth = 4;
         }
         if ((fname.find(".sn") == std::string::npos) &&
             (fname.find(".trim") == std::string::npos)) {
-            ostfn << ".sn" << std::setfill('0') << std::setw(serialNumberWidth)
-                  << std::dec << getSerialNumber();
+            ostfn << ".sn" << std::setfill('0') << std::setw(moduleIdWidth)
+                  << std::dec << getModuleId();
         }
         auto myMod = readSettingsFile(ostfn.str());
         setModule(myMod);
@@ -823,13 +819,13 @@ std::vector<uint64_t> Module::getNumMissingPackets() const {
         auto client = ReceiverSocket(shm()->rxHostname, shm()->rxTCPPort);
         client.Send(F_GET_NUM_MISSING_PACKETS);
         if (client.Receive<int>() == FAIL) {
-            throw RuntimeError("Receiver " + std::to_string(moduleId) +
+            throw RuntimeError("Receiver " + std::to_string(moduleIndex) +
                                " returned error: " + client.readErrorMessage());
         } else {
             auto nports = client.Receive<int>();
             std::vector<uint64_t> retval(nports);
             client.Receive(retval);
-            LOG(logDEBUG1) << "Missing packets of Receiver" << moduleId << ": "
+            LOG(logDEBUG1) << "Missing packets of Receiver" << moduleIndex << ": "
                            << sls::ToString(retval);
             return retval;
         }
@@ -997,7 +993,7 @@ void Module::setDestinationUDPIP(const IpAddr ip) {
     if (shm()->useReceiverFlag) {
         sls::MacAddr retval(0LU);
         sendToReceiver(F_SET_RECEIVER_UDP_IP, ip, retval);
-        LOG(logINFO) << "Setting destination udp mac of detector " << moduleId
+        LOG(logINFO) << "Setting destination udp mac of detector " << moduleIndex
                      << " to " << retval;
         sendToDetector(F_SET_DEST_UDP_MAC, retval, nullptr);
     }
@@ -1017,7 +1013,7 @@ void Module::setDestinationUDPIP2(const IpAddr ip) {
     if (shm()->useReceiverFlag) {
         sls::MacAddr retval(0LU);
         sendToReceiver(F_SET_RECEIVER_UDP_IP2, ip, retval);
-        LOG(logINFO) << "Setting destination udp mac2 of detector " << moduleId
+        LOG(logINFO) << "Setting destination udp mac2 of detector " << moduleIndex
                      << " to " << retval;
         sendToDetector(F_SET_DEST_UDP_MAC2, retval, nullptr);
     }
@@ -1075,7 +1071,7 @@ void Module::validateUDPConfiguration() {
 
 std::string Module::printReceiverConfiguration() {
     std::ostringstream os;
-    os << "\n\nDetector " << moduleId << "\nReceiver Hostname:\t"
+    os << "\n\nDetector " << moduleIndex << "\nReceiver Hostname:\t"
        << getReceiverHostname();
 
     if (shm()->myDetectorType == JUNGFRAU) {
@@ -1189,7 +1185,7 @@ void Module::setReceiverHostname(const std::string &receiverIP) {
     retval.detType = shm()->myDetectorType;
     retval.numberOfDetector.x = shm()->numberOfDetector.x;
     retval.numberOfDetector.y = shm()->numberOfDetector.y;
-    retval.moduleId = moduleId;
+    retval.moduleIndex = moduleIndex;
     memset(retval.hostname, 0, sizeof(retval.hostname));
     strcpy_safe(retval.hostname, shm()->hostname);
 
@@ -1199,13 +1195,13 @@ void Module::setReceiverHostname(const std::string &receiverIP) {
     if (retval.udp_dstmac == 0 && retvals[0] != 0) {
         LOG(logINFO) << "Setting destination udp mac of "
                         "detector "
-                     << moduleId << " to " << retvals[0];
+                     << moduleIndex << " to " << retvals[0];
         sendToDetector(F_SET_DEST_UDP_MAC, retvals[0], nullptr);
     }
     if (retval.udp_dstmac2 == 0 && retvals[1] != 0) {
         LOG(logINFO) << "Setting destination udp mac2 of "
                         "detector "
-                     << moduleId << " to " << retvals[1];
+                     << moduleIndex << " to " << retvals[1];
         sendToDetector(F_SET_DEST_UDP_MAC2, retvals[1], nullptr);
     }
 
@@ -1521,7 +1517,7 @@ void Module::sendReceiverRateCorrections(const std::vector<int64_t> &t) {
     receiver.Send(static_cast<int>(t.size()));
     receiver.Send(t);
     if (receiver.Receive<int>() == FAIL) {
-        throw RuntimeError("Receiver " + std::to_string(moduleId) +
+        throw RuntimeError("Receiver " + std::to_string(moduleIndex) +
                            " returned error: " + receiver.readErrorMessage());
     }
 }
@@ -1786,7 +1782,7 @@ void Module::sendVetoPhoton(const int chipIndex,
     client.Send(gainIndices);
     client.Send(values);
     if (client.Receive<int>() == FAIL) {
-        throw RuntimeError("Detector " + std::to_string(moduleId) +
+        throw RuntimeError("Detector " + std::to_string(moduleIndex) +
                            " returned error: " + client.readErrorMessage());
     }
 }
@@ -1798,7 +1794,7 @@ void Module::getVetoPhoton(const int chipIndex,
     client.Send(F_GET_VETO_PHOTON);
     client.Send(chipIndex);
     if (client.Receive<int>() == FAIL) {
-        throw RuntimeError("Detector " + std::to_string(moduleId) +
+        throw RuntimeError("Detector " + std::to_string(moduleIndex) +
                            " returned error: " + client.readErrorMessage());
     }
 
@@ -2033,7 +2029,7 @@ void Module::getBadChannels(const std::string &fname) const {
     auto client = DetectorSocket(shm()->hostname, shm()->controlPort);
     client.Send(F_GET_BAD_CHANNELS);
     if (client.Receive<int>() == FAIL) {
-        throw RuntimeError("Detector " + std::to_string(moduleId) +
+        throw RuntimeError("Detector " + std::to_string(moduleIndex) +
                            " returned error: " + client.readErrorMessage());
     }
     // receive badchannels
@@ -2090,7 +2086,7 @@ void Module::setBadChannels(const std::string &fname) {
         client.Send(badchannels);
     }
     if (client.Receive<int>() == FAIL) {
-        throw RuntimeError("Detector " + std::to_string(moduleId) +
+        throw RuntimeError("Detector " + std::to_string(moduleIndex) +
                            " returned error: " + client.readErrorMessage());
     }
 }
@@ -2404,7 +2400,7 @@ std::map<std::string, std::string> Module::getAdditionalJsonHeader() const {
     auto client = ReceiverSocket(shm()->rxHostname, shm()->rxTCPPort);
     client.Send(F_GET_ADDITIONAL_JSON_HEADER);
     if (client.Receive<int>() == FAIL) {
-        throw RuntimeError("Receiver " + std::to_string(moduleId) +
+        throw RuntimeError("Receiver " + std::to_string(moduleIndex) +
                            " returned error: " + client.readErrorMessage());
     } else {
         auto size = client.Receive<int>();
@@ -2453,7 +2449,7 @@ void Module::setAdditionalJsonHeader(
         client.Send(&buff[0], buff.size());
 
     if (client.Receive<int>() == FAIL) {
-        throw RuntimeError("Receiver " + std::to_string(moduleId) +
+        throw RuntimeError("Receiver " + std::to_string(moduleIndex) +
                            " returned error: " + client.readErrorMessage());
     }
 }
@@ -3007,7 +3003,7 @@ slsDetectorDefs::detectorType Module::getDetectorTypeFromShm(int det_id,
     shm.OpenSharedMemory();
     if (verify && shm()->shmversion != SLS_SHMVERSION) {
         std::ostringstream ss;
-        ss << "Single shared memory (" << det_id << "-" << moduleId
+        ss << "Single shared memory (" << det_id << "-" << moduleIndex
            << ":)version mismatch (expected 0x" << std::hex << SLS_SHMVERSION
            << " but got 0x" << shm()->shmversion << ")" << std::dec
            << ". Clear Shared memory to continue.";
@@ -3018,7 +3014,7 @@ slsDetectorDefs::detectorType Module::getDetectorTypeFromShm(int det_id,
 }
 
 void Module::initSharedMemory(detectorType type, int det_id, bool verify) {
-    shm = SharedMemory<sharedSlsDetector>(det_id, moduleId);
+    shm = SharedMemory<sharedSlsDetector>(det_id, moduleIndex);
     if (!shm.IsExisting()) {
         shm.CreateSharedMemory();
         initializeDetectorStructure(type);
@@ -3026,7 +3022,7 @@ void Module::initSharedMemory(detectorType type, int det_id, bool verify) {
         shm.OpenSharedMemory();
         if (verify && shm()->shmversion != SLS_SHMVERSION) {
             std::ostringstream ss;
-            ss << "Single shared memory (" << det_id << "-" << moduleId
+            ss << "Single shared memory (" << det_id << "-" << moduleIndex
                << ":) version mismatch (expected 0x" << std::hex
                << SLS_SHMVERSION << " but got 0x" << shm()->shmversion << ")"
                << std::dec << ". Clear Shared memory to continue.";
@@ -3048,7 +3044,7 @@ void Module::initializeDetectorStructure(detectorType type) {
     shm()->rxTCPPort = DEFAULT_PORTNO + 2;
     shm()->useReceiverFlag = false;
     shm()->zmqport = DEFAULT_ZMQ_CL_PORTNO +
-                     (moduleId * ((shm()->myDetectorType == EIGER) ? 2 : 1));
+                     (moduleIndex * ((shm()->myDetectorType == EIGER) ? 2 : 1));
     shm()->zmqip = IpAddr{};
     shm()->numUDPInterfaces = 1;
     shm()->stoppedFlag = false;
@@ -3161,7 +3157,7 @@ void Module::setModule(sls_detector_module &module, bool trimbits) {
     client.Send(F_SET_MODULE);
     sendModule(&module, client);
     if (client.Receive<int>() == FAIL) {
-        throw RuntimeError("Detector " + std::to_string(moduleId) +
+        throw RuntimeError("Detector " + std::to_string(moduleIndex) +
                            " returned error: " + client.readErrorMessage());
     }
 }
@@ -3174,7 +3170,7 @@ void Module::updateReceiverStreamingIP() {
         if (ip == 0) {
             ip = HostnameToIp(shm()->rxHostname);
         }
-        LOG(logINFO) << "Setting default receiver " << moduleId
+        LOG(logINFO) << "Setting default receiver " << moduleIndex
                      << " streaming zmq ip to " << ip;
     }
     setReceiverStreamingIP(ip);
@@ -3325,12 +3321,12 @@ std::string Module::getTrimbitFilename(detectorSettings s, int e_eV) {
         throw RuntimeError(
             "Settings or trimbit files not defined for this detector.");
     }
-    int serialNumberWidth = 3;
+    int moduleIdWidth = 3;
     if (shm()->myDetectorType == MYTHEN3) {
-        serialNumberWidth = 4;
+        moduleIdWidth = 4;
     }
-    ostfn << std::setfill('0') << std::setw(serialNumberWidth) << std::dec
-          << getSerialNumber() << std::setbase(10);
+    ostfn << std::setfill('0') << std::setw(moduleIdWidth) << std::dec
+          << getModuleId() << std::setbase(10);
     return ostfn.str();
 }
 
@@ -3412,20 +3408,20 @@ void Module::programFPGAviaBlackfin(std::vector<char> buffer) {
     uint64_t filesize = buffer.size();
     // send program from memory to detector
     LOG(logINFO) << "Sending programming binary (from pof) to detector "
-                 << moduleId << " (" << shm()->hostname << ")";
+                 << moduleIndex << " (" << shm()->hostname << ")";
     auto client = DetectorSocket(shm()->hostname, shm()->controlPort);
     client.Send(F_PROGRAM_FPGA);
     client.Send(filesize);
     // error in detector at opening file pointer to flash
     if (client.Receive<int>() == FAIL) {
         std::ostringstream os;
-        os << "Detector " << moduleId << " (" << shm()->hostname << ")"
+        os << "Detector " << moduleIndex << " (" << shm()->hostname << ")"
            << " returned error: " << client.readErrorMessage();
         throw RuntimeError(os.str());
     }
 
     // erasing flash
-    LOG(logINFO) << "Erasing Flash for detector " << moduleId << " ("
+    LOG(logINFO) << "Erasing Flash for detector " << moduleIndex << " ("
                  << shm()->hostname << ")";
     printf("%d%%\r", 0);
     std::cout << std::flush;
@@ -3443,7 +3439,7 @@ void Module::programFPGAviaBlackfin(std::vector<char> buffer) {
         std::cout << std::flush;
     }
     printf("\n");
-    LOG(logINFO) << "Writing to Flash to detector " << moduleId << " ("
+    LOG(logINFO) << "Writing to Flash to detector " << moduleIndex << " ("
                  << shm()->hostname << ")";
     printf("%d%%\r", 0);
     std::cout << std::flush;
@@ -3464,7 +3460,7 @@ void Module::programFPGAviaBlackfin(std::vector<char> buffer) {
         if (client.Receive<int>() == FAIL) {
             std::cout << '\n';
             std::ostringstream os;
-            os << "Detector " << moduleId << " (" << shm()->hostname << ")"
+            os << "Detector " << moduleIndex << " (" << shm()->hostname << ")"
                << " returned error: " << client.readErrorMessage();
             throw RuntimeError(os.str());
         }
@@ -3483,7 +3479,7 @@ void Module::programFPGAviaBlackfin(std::vector<char> buffer) {
     // fpga has picked up from flash successfully
     if (client.Receive<int>() == FAIL) {
         std::ostringstream os;
-        os << "Detector " << moduleId << " (" << shm()->hostname << ")"
+        os << "Detector " << moduleIndex << " (" << shm()->hostname << ")"
            << " returned error: " << client.readErrorMessage();
         throw RuntimeError(os.str());
     }
@@ -3494,7 +3490,7 @@ void Module::programFPGAviaBlackfin(std::vector<char> buffer) {
 
 void Module::programFPGAviaNios(std::vector<char> buffer) {
     LOG(logINFO) << "Sending programming binary (from rbf) to detector "
-                 << moduleId << " (" << shm()->hostname << ")";
+                 << moduleIndex << " (" << shm()->hostname << ")";
 
     auto client = DetectorSocket(shm()->hostname, shm()->controlPort);
     client.Send(F_PROGRAM_FPGA);
@@ -3502,14 +3498,14 @@ void Module::programFPGAviaNios(std::vector<char> buffer) {
     client.Send(filesize);
     if (client.Receive<int>() == FAIL) {
         std::ostringstream os;
-        os << "Detector " << moduleId << " (" << shm()->hostname << ")"
+        os << "Detector " << moduleIndex << " (" << shm()->hostname << ")"
            << " returned error: " << client.readErrorMessage();
         throw RuntimeError(os.str());
     }
     client.Send(buffer);
     if (client.Receive<int>() == FAIL) {
         std::ostringstream os;
-        os << "Detector " << moduleId << " (" << shm()->hostname << ")"
+        os << "Detector " << moduleIndex << " (" << shm()->hostname << ")"
            << " returned error: " << client.readErrorMessage();
         throw RuntimeError(os.str());
     }
diff --git a/slsDetectorSoftware/src/Module.h b/slsDetectorSoftware/src/Module.h
index e8912feb3..89b02d0ac 100644
--- a/slsDetectorSoftware/src/Module.h
+++ b/slsDetectorSoftware/src/Module.h
@@ -66,12 +66,12 @@ class Module : public virtual slsDetectorDefs {
 
     /** creating new shared memory
     verify is if shared memory version matches existing one */
-    explicit Module(detectorType type, int det_id = 0, int module_id = 0,
+    explicit Module(detectorType type, int det_id = 0, int module_index = 0,
                     bool verify = true);
 
     /** opening existing shared memory
     verify is if shared memory version matches existing one */
-    explicit Module(int det_id = 0, int module_id = 0, bool verify = true);
+    explicit Module(int det_id = 0, int module_index = 0, bool verify = true);
 
     virtual ~Module();
 
@@ -91,7 +91,6 @@ class Module : public virtual slsDetectorDefs {
     int64_t getDetectorServerVersion() const;
     int64_t getSerialNumber() const;
     int getModuleId() const;
-    void setModuleId(const int value);
     int64_t getReceiverSoftwareVersion() const;
     static detectorType getTypeFromDetector(const std::string &hostname,
                                             int cport = DEFAULT_PORTNO);
@@ -747,7 +746,7 @@ class Module : public virtual slsDetectorDefs {
     void programFPGAviaBlackfin(std::vector<char> buffer);
     void programFPGAviaNios(std::vector<char> buffer);
 
-    const int moduleId;
+    const int moduleIndex;
     mutable sls::SharedMemory<sharedSlsDetector> shm{0, 0};
 };
 
diff --git a/slsReceiverSoftware/src/ClientInterface.cpp b/slsReceiverSoftware/src/ClientInterface.cpp
index afbd2f168..b4d7464db 100644
--- a/slsReceiverSoftware/src/ClientInterface.cpp
+++ b/slsReceiverSoftware/src/ClientInterface.cpp
@@ -337,7 +337,7 @@ int ClientInterface::setup_receiver(Interface &socket) {
         int msize[2] = {arg.numberOfDetector.x, arg.numberOfDetector.y};
         impl()->setDetectorSize(msize);
     }
-    impl()->setModulePositionId(arg.moduleId);
+    impl()->setModulePositionId(arg.moduleIndex);
     impl()->setDetectorHostname(arg.hostname);
 
     // udp setup
diff --git a/slsSupportLib/include/sls/sls_detector_defs.h b/slsSupportLib/include/sls/sls_detector_defs.h
index c4b24677a..85d10288f 100644
--- a/slsSupportLib/include/sls/sls_detector_defs.h
+++ b/slsSupportLib/include/sls/sls_detector_defs.h
@@ -500,7 +500,7 @@ typedef struct {
     struct rxParameters {
         detectorType detType{GENERIC};
         xy numberOfDetector;
-        int moduleId{0};
+        int moduleIndex{0};
         char hostname[MAX_STR_LENGTH];
         int udpInterfaces{1};
         int udp_dstport{0};
diff --git a/slsSupportLib/include/sls/sls_detector_funcs.h b/slsSupportLib/include/sls/sls_detector_funcs.h
index 0c0403aca..4a4fd8f61 100755
--- a/slsSupportLib/include/sls/sls_detector_funcs.h
+++ b/slsSupportLib/include/sls/sls_detector_funcs.h
@@ -244,7 +244,6 @@ enum detFuncs {
     F_SET_DBIT_PIPELINE,
     F_GET_DBIT_PIPELINE,
     F_GET_MODULE_ID,
-    F_SET_MODULE_ID,
     F_GET_DEST_UDP_LIST,
     F_SET_DEST_UDP_LIST,
     F_GET_NUM_DEST_UDP,
@@ -602,7 +601,6 @@ const char* getFunctionNameFromEnum(enum detFuncs func) {
     case F_SET_DBIT_PIPELINE:               return "F_SET_DBIT_PIPELINE";
     case F_GET_DBIT_PIPELINE:               return "F_GET_DBIT_PIPELINE";
     case F_GET_MODULE_ID:                   return "F_GET_MODULE_ID";
-    case F_SET_MODULE_ID:                   return "F_SET_MODULE_ID";
     case F_GET_DEST_UDP_LIST:               return "F_GET_DEST_UDP_LIST";
     case F_SET_DEST_UDP_LIST:               return "F_SET_DEST_UDP_LIST";
     case F_GET_NUM_DEST_UDP:                return "F_GET_NUM_DEST_UDP";
diff --git a/slsSupportLib/include/sls/versionAPI.h b/slsSupportLib/include/sls/versionAPI.h
index 8f2cc2648..556c634f8 100644
--- a/slsSupportLib/include/sls/versionAPI.h
+++ b/slsSupportLib/include/sls/versionAPI.h
@@ -4,10 +4,11 @@
 #define APIRECEIVER 0x210831
 #define APIGUI 0x210819
 
-#define APICTB 0x210907
-#define APIGOTTHARD 0x210907
-#define APIGOTTHARD2 0x210907
-#define APIJUNGFRAU 0x210907
-#define APIMYTHEN3 0x210907
-#define APIMOENCH 0x210907
-#define APIEIGER 0x210907
+
+#define APICTB 0x210909
+#define APIGOTTHARD 0x210909
+#define APIGOTTHARD2 0x210909
+#define APIJUNGFRAU 0x210909
+#define APIMYTHEN3 0x210909
+#define APIMOENCH 0x210909
+#define APIEIGER 0x210909
diff --git a/slsSupportLib/src/ToString.cpp b/slsSupportLib/src/ToString.cpp
index 25bd91e35..8e7bd69cd 100644
--- a/slsSupportLib/src/ToString.cpp
+++ b/slsSupportLib/src/ToString.cpp
@@ -28,7 +28,7 @@ std::string ToString(const slsDetectorDefs::rxParameters &r) {
     oss << '[' << "detType:" << r.detType << std::endl
         << "numberOfDetector.x:" << r.numberOfDetector.x << std::endl
         << "numberOfDetector.y:" << r.numberOfDetector.y << std::endl
-        << "moduleId:" << r.moduleId << std::endl
+        << "moduleIndex:" << r.moduleIndex << std::endl
         << "hostname:" << r.hostname << std::endl
         << "udpInterfaces:" << r.udpInterfaces << std::endl
         << "udp_dstport:" << r.udp_dstport << std::endl