diff --git a/CMakeLists.txt b/CMakeLists.txt
index b4ea785fe..daffa4b67 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -199,6 +199,7 @@ option(SLS_USE_GUI "GUI" OFF)
 option(SLS_USE_SIMULATOR "Simulator" OFF)
 option(SLS_USE_TESTS "TESTS" OFF)
 option(SLS_USE_SANITIZER "Sanitizers for debugging" OFF)
+option(SLS_USE_SANITIZER_IN_SERVER "Sanitizers for debugging" OFF)
 option(SLS_USE_PYTHON "Python bindings" OFF)
 option(SLS_INSTALL_PYTHONEXT "Install the python extension in the install tree under CMAKE_INSTALL_PREFIX/python/" OFF)
 option(SLS_USE_CTBGUI "ctb GUI" OFF)
@@ -346,6 +347,11 @@ if (NOT TARGET slsProjectCSettings)
     target_link_libraries(slsProjectCSettings INTERFACE
         Threads::Threads
     )
+
+    if(SLS_USE_SANITIZER_IN_SERVER)
+        target_compile_options(slsProjectCSettings INTERFACE -fsanitize=address,undefined -fno-omit-frame-pointer)
+        target_link_libraries(slsProjectCSettings INTERFACE -fsanitize=address,undefined)
+    endif()
 endif()
 
 
diff --git a/python/src/detector.cpp b/python/src/detector.cpp
index 070dac493..d3e6be8b3 100644
--- a/python/src/detector.cpp
+++ b/python/src/detector.cpp
@@ -2198,5 +2198,17 @@ void init_det(py::module &m) {
                        (Result<sls::ns>(Detector::*)(sls::Positions) const) &
                            Detector::getMeasurementTime,
                        py::arg() = Positions{});
+    CppDetectorApi.def("readSpi",
+                       (Result<std::vector<uint8_t>>(Detector::*)(
+                           int, int, int, sls::Positions) const) &
+                           Detector::readSpi,
+                       py::arg(), py::arg(), py::arg(),
+                       py::arg() = Positions{});
+    CppDetectorApi.def(
+        "writeSpi",
+        (void (Detector::*)(int, int, const std::vector<uint8_t> &,
+                            sls::Positions)) &
+            Detector::writeSpi,
+        py::arg(), py::arg(), py::arg(), py::arg() = Positions{});
     ;
 }
diff --git a/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h b/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
index 2c7e60ce9..e43148b83 100644
--- a/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
+++ b/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
@@ -338,3 +338,5 @@ int get_collection_mode(int);
 int set_collection_mode(int);
 int get_pattern_wait_interval(int);
 int set_pattern_wait_interval(int);
+int spi_read(int);
+int spi_write(int);
diff --git a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
index 157daa377..174af28a8 100644
--- a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
+++ b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
@@ -7,6 +7,10 @@
 #include "sls/sls_detector_funcs.h"
 #include "slsDetectorFunctionList.h"
 
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+
 #if defined(CHIPTESTBOARDD) || defined(XILINX_CHIPTESTBOARDD) ||               \
     defined(MYTHEN3D)
 #include "Pattern.h"
@@ -19,6 +23,8 @@
 #include <sys/sysinfo.h>
 #include <unistd.h>
 
+#include <linux/spi/spidev.h>
+
 // defined in the detector specific Makefile
 #ifdef EIGERD
 const enum detectorType myDetectorType = EIGER;
@@ -515,6 +521,8 @@ void function_table() {
     flist[F_SET_COLLECTION_MODE] = &set_collection_mode;
     flist[F_GET_PATTERN_WAIT_INTERVAL] = &get_pattern_wait_interval;
     flist[F_SET_PATTERN_WAIT_INTERVAL] = &set_pattern_wait_interval;
+    flist[F_SPI_READ] = &spi_read;
+    flist[F_SPI_WRITE] = &spi_write;
     // check
     if (NUM_DET_FUNCTIONS >= RECEIVER_ENUM_START) {
         LOG(logERROR, ("The last detector function enum has reached its "
@@ -11095,4 +11103,305 @@ int set_pattern_wait_interval(int file_des) {
 
 #endif
     return Server_SendResult(file_des, INT64, NULL, 0);
+}
+
+/**
+ *  Non destructive read from SPI register. Read n_bytes by shifting in dummy
+ *  data while keeping csn 0 after the operation. Shift the read out data back
+ *  in to restore the register.  
+ */
+
+int spi_read(int file_des){
+#if !defined(XILINX_CHIPTESTBOARDD)
+    functionNotImplemented();
+    return sendError(file_des);
+#endif
+
+    int chip_id = 0;
+    if (receiveData(file_des, &chip_id, sizeof(chip_id), INT32) < 0){
+        return printSocketReadError();
+    }
+    if(chip_id < 0 || chip_id > 15){
+        sprintf(mess, "Invalid chip_id %d. Must be 0-15\n", chip_id);
+        return sendError(file_des);
+    }
+
+    int register_id = 0;
+    if (receiveData(file_des, &register_id, sizeof(register_id), INT32) < 0){
+        return printSocketReadError();
+    }
+    if(register_id < 0 || register_id > 15){
+        sprintf(mess, "Invalid register_id %d. Must be 0-15\n", register_id);
+        return sendError(file_des);
+    }
+
+    int n_bytes = 0;
+    if (receiveData(file_des, &n_bytes, sizeof(n_bytes), INT32) < 0){
+        return printSocketReadError();
+    }
+    if(n_bytes < 1 ){
+        sprintf(mess, "Invalid n_bytes %d. Must ask for a read of at least 1 byte\n", n_bytes);
+        return sendError(file_des);
+    }
+
+    LOG(logINFO, ("SPI Read Requested: chip_id=%d, register_id=%d, n_bytes=%d\n",
+                    chip_id, register_id, n_bytes));
+
+
+#ifdef VIRTUAL
+    // For the virtual detector we create a fake register to read from
+    // and fill it with 0,2,4,6,... This way we can check that copying
+    // of the data works as expected
+    uint8_t *fake_register = malloc(n_bytes);
+    if(fake_register == NULL){
+        LOG(logERROR, ("Could not allocate memory for fake register\n"));
+        exit(EXIT_FAILURE);
+    }
+    for (int i = 0; i < n_bytes; i++) {
+        fake_register[i] = (uint8_t)( (i*2) % 256 ); 
+    }
+#else
+    int spifd = open("/dev/spidev2.0", O_RDWR);
+    LOG(logINFO, ("SPI Read: opened spidev2.0 with fd=%d\n", spifd));
+    if(spifd < 0){
+        sprintf(mess, "Could not open /dev/spidev2.0\n");
+        return sendError(file_des);
+    }
+#endif
+
+    // Allocate dummy data to shif in, we keep a copy of this 
+    // to double check that we access a register of the correct size
+    uint8_t *dummy_data = malloc(n_bytes);
+    if(dummy_data == NULL){
+        LOG(logERROR, ("Could not allocate memory for dummy data\n"));
+        exit(EXIT_FAILURE);
+    }
+    for(int i=0; i<n_bytes; i++){
+        dummy_data[i] = (uint8_t)(i % 256);
+    }
+
+    // Allocate actual data buffer this holds the data we read out 
+    // and that we need to write back to restore the register
+    uint8_t *actual_data = malloc(n_bytes);
+    if(actual_data == NULL){
+        LOG(logERROR, ("Could not allocate memory for actual data\n"));
+        exit(EXIT_FAILURE);
+    }
+    memset(actual_data, 0, n_bytes);
+    
+
+    // Setup sending and receiving buffers and the spi_ioc_transfer struct.
+    // We need one more byte before the actual data to send chip_id and register_id
+	uint8_t* local_tx = malloc(n_bytes+1);
+    if(local_tx == NULL){
+        LOG(logERROR, ("Could not allocate memory for local_tx\n"));
+        exit(EXIT_FAILURE);
+    }
+	uint8_t* local_rx = malloc(n_bytes+1);
+    if(local_rx == NULL){
+        LOG(logERROR, ("Could not allocate memory for local_rx\n"));
+        exit(EXIT_FAILURE);
+    }
+
+    struct spi_ioc_transfer send_cmd[1];
+    memset(send_cmd, 0, sizeof(send_cmd));
+    send_cmd[0].len = n_bytes+1;
+	send_cmd[0].tx_buf = (unsigned long) local_tx;
+	send_cmd[0].rx_buf = (unsigned long) local_rx;
+
+    // 0 - Normal operation, 1 - CSN remains zero after operation
+    // We use cs_change = 1 to not close the SPI transaction and
+    // allow for shifting the read out data back in to restore the
+    // regitster
+	send_cmd[0].cs_change = 1; 
+
+    // First byte of the message is 4 bits chip_id then 4 bits register_id
+    local_tx[0] = ((chip_id & 0xF) << 4) | (register_id & 0xF);
+
+    // Then the data follows
+	for (int i=0; i < n_bytes; i++)
+		local_tx[i+1] = dummy_data[i];
+
+#ifdef VIRTUAL
+    // For the virtual detector we have to copy the data 
+
+    // First byte shuuld be 0x00
+    local_rx[0] = 0;
+
+    // Then we copy the data from the fake register to the local_rx buffer
+    // and the local_tx data to the fake register to emulate the shifting in and out of the data
+    for (int i=0; i < n_bytes; i++){
+        local_rx[i+1] = fake_register[i];
+        fake_register[i] = local_tx[i+1]; 
+    }
+
+#else
+    // For the real detector we do the transfer here
+    if(ioctl(spifd, SPI_IOC_MESSAGE(1), &send_cmd)<0){
+        //cleanup since we return early
+        close(spifd);
+        free(local_tx);
+        free(local_rx);
+        free(dummy_data);
+        free(actual_data);
+
+        //Send error message
+        sprintf(mess, "SPI write failed with %d:%s\n", errno, strerror(errno));
+        return sendError(file_des);
+    }
+#endif
+
+    // Copy everything but the first received byte to the user. First byte should be 0x00 anyway
+    for (int i=0; i < n_bytes; i++)
+		actual_data[i] = local_rx[i+1];
+
+    // Set up for the second transfer to restore the register
+    send_cmd[0].cs_change = 0; // we want to end the transaction after this transfer
+    local_tx[0] = ((chip_id & 0xF) << 4) | (register_id & 0xF);
+	for (int i=0; i < n_bytes; i++)
+		local_tx[i+1] = actual_data[i];
+
+#ifdef VIRTUAL
+    // Copy the data from the fake register to the local_rx buffer
+    for (int i=0; i < n_bytes; i++){
+        local_rx[i+1] = fake_register[i];
+    }
+    free(fake_register); // we are done with the fake register
+#else
+    if(ioctl(spifd, SPI_IOC_MESSAGE(1), &send_cmd)<0){
+        //cleanup since we return early
+        close(spifd);
+        free(local_tx);
+        free(local_rx);
+        free(dummy_data);
+        free(actual_data);
+
+        //Send error message
+        sprintf(mess, "SPI write failed with %d:%s\n", errno, strerror(errno));
+        return sendError(file_des);
+    }
+    close(spifd);
+#endif
+    ret = OK;
+    LOG(logDEBUG1, ("SPI Read Complete\n"));
+    Server_SendResult(file_des, INT32, NULL, 0);
+    sendData(file_des, actual_data, n_bytes, OTHER);
+
+    free(local_tx);
+	free(local_rx);
+    free(dummy_data);
+    free(actual_data);
+    return ret;
+
+}
+
+
+
+/**
+ * Write to SPI register. 
+ */
+int spi_write(int file_des){
+#if !defined(XILINX_CHIPTESTBOARDD)
+    functionNotImplemented();
+    return Server_SendResult(file_des, INT32, NULL, 0);
+#endif
+
+    int chip_id = 0;
+    if (receiveData(file_des, &chip_id, sizeof(chip_id), INT32) < 0){
+        return printSocketReadError();
+    }
+    if(chip_id < 0 || chip_id > 15){
+        ret = FAIL;
+        sprintf(mess, "Invalid chip_id %d. Must be 0-15\n", chip_id);
+        LOG(logERROR, (mess));
+        return Server_SendResult(file_des, INT32, NULL, 0);
+    }
+
+    int register_id = 0;
+    if (receiveData(file_des, &register_id, sizeof(register_id), INT32) < 0){
+        return printSocketReadError();
+    }
+    if(register_id < 0 || register_id > 15){
+        ret = FAIL;
+        sprintf(mess, "Invalid register_id %d. Must be 0-15\n", register_id);
+        LOG(logERROR, (mess));
+        return Server_SendResult(file_des, INT32, NULL, 0);
+    }
+
+    int n_bytes = 0;
+    if (receiveData(file_des, &n_bytes, sizeof(n_bytes), INT32) < 0){
+        return printSocketReadError();
+    }
+    if(n_bytes < 1 ){
+        sprintf(mess, "Invalid n_bytes %d. Must ask for a write of at least 1 byte\n", n_bytes);
+        return sendError(file_des);
+    }
+
+    LOG(logINFO, ("SPI Write Requested: chip_id=%d, register_id=%d, n_bytes=%d\n",
+                    chip_id, register_id, n_bytes));
+    
+    uint8_t *data = malloc(n_bytes);
+    if(data == NULL){
+        LOG(logERROR, ("Could not allocate memory for SPI write data\n"));
+        exit(EXIT_FAILURE);
+    }
+    memset(data, 0, n_bytes);
+    if (receiveData(file_des, data, n_bytes, OTHER) < 0){
+        free(data);
+        return printSocketReadError();
+    }
+
+    uint8_t* local_tx = malloc(n_bytes+1);
+    if(local_tx == NULL){
+        LOG(logERROR, ("Could not allocate memory for local_tx\n"));
+        exit(EXIT_FAILURE);
+    }
+	uint8_t* local_rx = malloc(n_bytes+1);
+    if(local_rx == NULL){
+        LOG(logERROR, ("Could not allocate memory for local_rx\n"));
+        exit(EXIT_FAILURE);
+    }
+
+    struct spi_ioc_transfer send_cmd[1];
+    memset(send_cmd, 0, sizeof(send_cmd));
+    send_cmd[0].len = n_bytes+1;
+	send_cmd[0].tx_buf = (unsigned long) local_tx;
+	send_cmd[0].rx_buf = (unsigned long) local_rx;
+
+    // 0 - Normal operation, 1 - CSn remains zero after operation
+	send_cmd[0].cs_change = 0; 
+    local_tx[0] = ((chip_id & 0xF) << 4) | (register_id & 0xF);
+	for (int i=0; i < n_bytes; i++)
+		local_tx[i+1] = data[i];
+
+#ifdef VIRTUAL
+    // For the virtual detector we have nothing to do
+#else
+    int spifd = open("/dev/spidev2.0", O_RDWR);
+    LOG(logINFO, ("SPI Read: opened spidev2.0 with fd=%d\n", spifd));
+    if(spifd < 0){
+        free(data);
+        free(local_tx);
+        free(local_rx);
+        sprintf(mess, "Could not open /dev/spidev2.0\n");
+        return sendError(file_des);
+    }
+    if(ioctl(spifd, SPI_IOC_MESSAGE(1), &send_cmd)<0){
+        close(spifd);
+        free(data);
+        free(local_tx);
+        free(local_rx);
+        sprintf(mess, "SPI write failed with %d:%s\n", errno, strerror(errno));
+        return sendError(file_des);
+    }
+    close(spifd);
+#endif
+
+    free(data);
+    free(local_tx);
+    free(local_rx);
+
+    ret = OK;
+    LOG(logDEBUG1, ("SPI Write Complete\n"));
+    return Server_SendResult(file_des, INT32, NULL, 0);
 }
\ No newline at end of file
diff --git a/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.c
index 7bed0d759..4c98ea216 100644
--- a/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.c
@@ -1884,4 +1884,4 @@ int getFrequency(enum CLKINDEX ind) {
     clkFrequency[ind] = XILINX_PLL_getFrequency(ind);
 #endif
     return clkFrequency[ind];
-}
\ No newline at end of file
+}
diff --git a/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.h b/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.h
index 1b584109f..8d76bf57b 100644
--- a/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.h
+++ b/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.h
@@ -171,4 +171,4 @@ int getTotalNumberOfChannels();
 void getNumberOfChannels(int *nchanx, int *nchany);
 int getNumberOfChips();
 int getNumberOfDACs();
-int getNumberOfChannelsPerChip();
\ No newline at end of file
+int getNumberOfChannelsPerChip();
diff --git a/slsDetectorSoftware/include/sls/Detector.h b/slsDetectorSoftware/include/sls/Detector.h
index a200c99c7..958e64dc5 100644
--- a/slsDetectorSoftware/include/sls/Detector.h
+++ b/slsDetectorSoftware/include/sls/Detector.h
@@ -2247,6 +2247,12 @@ class Detector {
 
     ///@}
 
+    Result<std::vector<uint8_t>> readSpi(int chip_id, int register_id,
+                                        int n_bytes, Positions pos = {}) const;
+
+    void writeSpi(int chip_id, int register_id,
+                                        const std::vector<uint8_t> &data, Positions pos = {});
+
   private:
     std::vector<uint16_t> getValidPortNumbers(uint16_t start_port);
     void updateRxRateCorrections();
diff --git a/slsDetectorSoftware/src/Detector.cpp b/slsDetectorSoftware/src/Detector.cpp
index 30d387f92..1960fd858 100644
--- a/slsDetectorSoftware/src/Detector.cpp
+++ b/slsDetectorSoftware/src/Detector.cpp
@@ -2954,4 +2954,19 @@ std::vector<uint16_t> Detector::getValidPortNumbers(uint16_t start_port) {
     return res;
 }
 
+Result<std::vector<uint8_t>> Detector::readSpi(int chip_id, int register_id,
+                                               int n_bytes,
+                                               Positions pos) const {
+    return pimpl->Parallel(&Module::readSpi, pos, chip_id, register_id,
+                           n_bytes);
+}
+
+void Detector::writeSpi(int chip_id, int register_id,
+                                        const std::vector<uint8_t> &data, Positions pos){
+    pimpl->Parallel(&Module::writeSpi, pos, chip_id, register_id, data);
+                                        }
+
+
+
+
 } // namespace sls
diff --git a/slsDetectorSoftware/src/Module.cpp b/slsDetectorSoftware/src/Module.cpp
index 6167f585d..b0dc43211 100644
--- a/slsDetectorSoftware/src/Module.cpp
+++ b/slsDetectorSoftware/src/Module.cpp
@@ -4074,4 +4074,45 @@ void Module::simulatingActivityinDetector(const std::string &functionType,
     }
     printf("\n");
 }
+
+std::vector<uint8_t> Module::readSpi(int chip_id, int register_id,
+                                               int n_bytes) const{
+    auto client = DetectorSocket(shm()->hostname, shm()->controlPort);
+    client.Send(F_SPI_READ);
+    client.setFnum(F_SPI_READ);
+    client.Send(chip_id);
+    client.Send(register_id);
+    client.Send(n_bytes);
+
+    if (client.Receive<int>() == FAIL) {   
+        std::ostringstream os;
+        os << "Module " << moduleIndex << " (" << shm()->hostname << ")"
+           << " returned error: " << client.readErrorMessage();
+        throw DetectorError(os.str());
+    }
+
+    std::vector<uint8_t> data(n_bytes);
+    client.Receive(data);
+    return data;
+    
+}
+
+void Module::writeSpi(int chip_id, int register_id,
+                      const std::vector<uint8_t> &data){
+    auto client = DetectorSocket(shm()->hostname, shm()->controlPort);
+    client.Send(F_SPI_WRITE);
+    client.setFnum(F_SPI_WRITE);
+    client.Send(chip_id);
+    client.Send(register_id);
+    client.Send(static_cast<int>(data.size()));
+    client.Send(data);
+
+    if (client.Receive<int>() == FAIL) {
+        std::ostringstream os;
+        os << "Module " << moduleIndex << " (" << shm()->hostname << ")"
+           << " returned error: " << client.readErrorMessage();
+        throw DetectorError(os.str());
+    }
+}
+
 } // namespace sls
diff --git a/slsDetectorSoftware/src/Module.h b/slsDetectorSoftware/src/Module.h
index d23cc095e..2e4fb5684 100644
--- a/slsDetectorSoftware/src/Module.h
+++ b/slsDetectorSoftware/src/Module.h
@@ -607,6 +607,10 @@ class Module : public virtual slsDetectorDefs {
     int64_t getNumberOfFramesFromStart() const;
     int64_t getActualTime() const;
     int64_t getMeasurementTime() const;
+    std::vector<uint8_t> readSpi(int chip_id, int register_id,
+                                               int n_bytes) const;
+
+    void writeSpi(int chip_id, int register_id, const std::vector<uint8_t> &data);
 
   private:
     std::string getReceiverLongVersion() const;
diff --git a/slsSupportLib/include/sls/sls_detector_funcs.h b/slsSupportLib/include/sls/sls_detector_funcs.h
index 6d49fee7e..9296547de 100755
--- a/slsSupportLib/include/sls/sls_detector_funcs.h
+++ b/slsSupportLib/include/sls/sls_detector_funcs.h
@@ -299,6 +299,8 @@ enum detFuncs {
     F_SET_COLLECTION_MODE,
     F_GET_PATTERN_WAIT_INTERVAL,
     F_SET_PATTERN_WAIT_INTERVAL,
+    F_SPI_READ,
+    F_SPI_WRITE,
 
     NUM_DET_FUNCTIONS,
     RECEIVER_ENUM_START = 512, /**< detector function should not exceed this
@@ -709,6 +711,8 @@ const char* getFunctionNameFromEnum(enum detFuncs func) {
     case F_SET_COLLECTION_MODE:             return "F_SET_COLLECTION_MODE";
     case F_GET_PATTERN_WAIT_INTERVAL:       return "F_GET_PATTERN_WAIT_INTERVAL";
     case F_SET_PATTERN_WAIT_INTERVAL:       return "F_SET_PATTERN_WAIT_INTERVAL";
+    case F_SPI_READ:                        return "F_SPI_READ";
+    case F_SPI_WRITE:                       return "F_SPI_WRITE";
 
     case NUM_DET_FUNCTIONS:              	return "NUM_DET_FUNCTIONS";
     case RECEIVER_ENUM_START:				return "RECEIVER_ENUM_START";