diff --git a/slsDetectorSoftware/generator/Caller.in.h b/slsDetectorSoftware/generator/Caller.in.h
index f1a3a2821..de91b2abc 100644
--- a/slsDetectorSoftware/generator/Caller.in.h
+++ b/slsDetectorSoftware/generator/Caller.in.h
@@ -21,6 +21,7 @@ class Caller {
     UdpDestination getUdpEntry();
     int GetLevelAndInsertIntoArgs(std::string levelSeparatedCommand);
     void WrongNumberOfParameters(size_t expected);
+    std::vector<defs::ROI> parseRoiVector(const std::string &input);
 
     template <typename V> std::string OutStringHex(const V &value) {
         if (value.equal())
diff --git a/slsDetectorSoftware/generator/commands.yaml b/slsDetectorSoftware/generator/commands.yaml
index 3b96e48f5..1ae493055 100644
--- a/slsDetectorSoftware/generator/commands.yaml
+++ b/slsDetectorSoftware/generator/commands.yaml
@@ -1739,13 +1739,12 @@ readout:
     PUT:
       function: startDetectorReadout
 
-# TODO
-#rx_clearroi:
-#  inherit_actions: EXECUTE_SET_COMMAND_NOID
-#  help: "\n\tResets Region of interest in receiver. Default is all channels/pixels enabled."
-#  actions:
-#    PUT:
-#      function: clearRxROI
+rx_clearroi:
+  inherit_actions: EXECUTE_SET_COMMAND_NOID
+  help: "\n\tResets Region of interest in receiver. Default is all channels/pixels enabled."
+  actions:
+    PUT:
+      function: clearRxROI
 
 ################# EXECUTE_SET_COMMAND ########################
 start:
@@ -2593,18 +2592,13 @@ rx_zmqip:
         PUT:
           argc: -1
 
-#TODO
-#rx_roi:
-#    is_description: true
-#    actions:
-#        GET:
-#          argc: 0
-#        PUT:
-#          args:
-#            - argc: 2
-#              arg_types: [ int, int ]
-#            - argc: 4
-#              arg_types: [ int, int, int, int ]
+rx_roi:
+    is_description: true
+    actions:
+        GET:
+          argc: 0
+        PUT:
+          argc: -1
 
 ratecorr:
     is_description: true
diff --git a/slsDetectorSoftware/include/sls/Detector.h b/slsDetectorSoftware/include/sls/Detector.h
index fd85e427a..ae407f22b 100644
--- a/slsDetectorSoftware/include/sls/Detector.h
+++ b/slsDetectorSoftware/include/sls/Detector.h
@@ -988,13 +988,12 @@ class Detector {
     std::vector<defs::ROI> getRxROI() const;
 
     /** only at multi module level without gap pixels */
-    void setRxROI(const std::vector<defs::ROI>& args);
+    void setRxROI(const std::vector<defs::ROI> &args);
 
     void clearRxROI();
 
     int getNumberOfUdpPortsInRxROI() const;
 
-
     ///@}
 
     /** @name File */
diff --git a/slsDetectorSoftware/src/Caller.cpp b/slsDetectorSoftware/src/Caller.cpp
index 9fb08ff69..78a6f79d7 100644
--- a/slsDetectorSoftware/src/Caller.cpp
+++ b/slsDetectorSoftware/src/Caller.cpp
@@ -10594,7 +10594,7 @@ std::string Caller::rx_arping(int action) {
 
     return os.str();
 }
-/*
+
 std::string Caller::rx_clearroi(int action) {
 
     std::ostringstream os;
@@ -10637,7 +10637,7 @@ std::string Caller::rx_clearroi(int action) {
 
     return os.str();
 }
-*/
+
 std::string Caller::rx_dbitoffset(int action) {
 
     std::ostringstream os;
diff --git a/slsDetectorSoftware/src/Caller.h b/slsDetectorSoftware/src/Caller.h
index d1df0c0f2..5a667938f 100644
--- a/slsDetectorSoftware/src/Caller.h
+++ b/slsDetectorSoftware/src/Caller.h
@@ -21,6 +21,7 @@ class Caller {
     UdpDestination getUdpEntry();
     int GetLevelAndInsertIntoArgs(std::string levelSeparatedCommand);
     void WrongNumberOfParameters(size_t expected);
+    std::vector<defs::ROI> parseRoiVector(const std::string &input);
 
     template <typename V> std::string OutStringHex(const V &value) {
         if (value.equal())
@@ -233,7 +234,7 @@ class Caller {
     std::string runclk(int action);
     std::string runtime(int action);
     std::string rx_arping(int action);
-    //std::string rx_clearroi(int action);
+    std::string rx_clearroi(int action);
     std::string rx_dbitlist(int action);
     std::string rx_dbitoffset(int action);
     std::string rx_dbitreorder(int action);
@@ -251,7 +252,7 @@ class Caller {
     std::string rx_padding(int action);
     std::string rx_printconfig(int action);
     std::string rx_realudpsocksize(int action);
-    //std::string rx_roi(int action);
+    std::string rx_roi(int action);
     std::string rx_silent(int action);
     std::string rx_start(int action);
     std::string rx_status(int action);
@@ -580,7 +581,7 @@ class Caller {
         {"runclk", &Caller::runclk},
         {"runtime", &Caller::runtime},
         {"rx_arping", &Caller::rx_arping},
-        //{"rx_clearroi", &Caller::rx_clearroi},
+        {"rx_clearroi", &Caller::rx_clearroi},
         {"rx_dbitlist", &Caller::rx_dbitlist},
         {"rx_dbitoffset", &Caller::rx_dbitoffset},
         {"rx_dbitreorder", &Caller::rx_dbitreorder},
@@ -598,7 +599,7 @@ class Caller {
         {"rx_padding", &Caller::rx_padding},
         {"rx_printconfig", &Caller::rx_printconfig},
         {"rx_realudpsocksize", &Caller::rx_realudpsocksize},
-        //{"rx_roi", &Caller::rx_roi},
+        {"rx_roi", &Caller::rx_roi},
         {"rx_silent", &Caller::rx_silent},
         {"rx_start", &Caller::rx_start},
         {"rx_status", &Caller::rx_status},
diff --git a/slsDetectorSoftware/src/CallerSpecial.cpp b/slsDetectorSoftware/src/CallerSpecial.cpp
index 394a9d5e7..033224ad8 100644
--- a/slsDetectorSoftware/src/CallerSpecial.cpp
+++ b/slsDetectorSoftware/src/CallerSpecial.cpp
@@ -719,50 +719,124 @@ std::string Caller::rx_zmqip(int action) {
     }
     return os.str();
 }
-/* TODO
+
 std::string Caller::rx_roi(int action) {
     std::ostringstream os;
     if (action == defs::HELP_ACTION) {
         os << "[xmin] [xmax] [ymin] [ymax]\n\tRegion of interest in "
-              "receiver.\n\tOnly allowed at multi module level and without gap "
+              "receiver.\n\t"
+           << "For a list of rois, use '[' and '];' to distinguish between "
+              "rois and use comma inside the square brackets.\n\t"
+           << "For example: [0, 100, 0, 100];[200, 300, 0, 100] will set two "
+              "rois.\n\t"
+           << "Only allowed at multi module level and without gap "
               "pixels."
            << '\n';
     } else if (action == defs::GET_ACTION) {
         if (!args.empty()) {
             WrongNumberOfParameters(0);
         }
-        if (det_id == -1) {
-            auto t = det->getRxROI();
-            os << t << '\n';
+        if (det_id != -1) {
+            throw RuntimeError("Cannot execute receiver ROI at module level");
         } else {
-            auto t = det->getIndividualRxROIs(std::vector<int>{det_id});
-            os << t << '\n';
+            auto t = det->getRxROI();
+            // os << ToString(t) << '\n';
+            for (const auto &r : t) {
+                os << r << ';';
+            }
+            if (!t.empty()) {
+                os.seekp(-1, std::ios_base::end); // remove trailing ;
+            }
+            os << '\n';
         }
     } else if (action == defs::PUT_ACTION) {
-        defs::ROI t;
-        // 2 or 4 arguments
-        if (args.size() != 2 && args.size() != 4) {
-            WrongNumberOfParameters(2);
-        }
-        if (args.size() == 2 || args.size() == 4) {
+        std::vector<defs::ROI> rois;
+
+        // Support multiple args with bracketed ROIs, or single arg with
+        // semicolon-separated vector
+        bool isVectorInput =
+            std::all_of(args.begin(), args.end(), [](const std::string &a) {
+                return a.find('[') != std::string::npos &&
+                       a.find(']') != std::string::npos;
+            });
+
+        // previous format: 2 or 4 separate args
+        if ((args.size() == 2 || args.size() == 4) && !isVectorInput) {
+            defs::ROI t;
             t.xmin = StringTo<int>(args[0]);
             t.xmax = StringTo<int>(args[1]);
+            if (args.size() == 4) {
+                t.ymin = StringTo<int>(args[2]);
+                t.ymax = StringTo<int>(args[3]);
+            }
+            rois.emplace_back(t);
+        } else {
+            if (!isVectorInput)
+                WrongNumberOfParameters(2);
+            else {
+                for (const auto &arg : args) {
+                    auto subRois = parseRoiVector(arg);
+                    rois.insert(rois.end(), subRois.begin(), subRois.end());
+                }
+            }
         }
-        if (args.size() == 4) {
-            t.ymin = StringTo<int>(args[2]);
-            t.ymax = StringTo<int>(args[3]);
-        }
+
         // only multi level
         if (det_id != -1) {
             throw RuntimeError("Cannot execute receiver ROI at module level");
         }
-        det->setRxROI(t);
-        os << t << '\n';
+
+        det->setRxROI(rois);
+        // os << ToString(rois) << '\n';
+        for (const auto &r : rois) {
+            os << r << ';';
+        }
+        if (!rois.empty()) {
+            os.seekp(-1, std::ios_base::end); // remove trailing ;
+        }
+        os << '\n';
     } else {
         throw RuntimeError("Unknown action");
     }
     return os.str();
-}*/
+}
+
+std::vector<defs::ROI> Caller::parseRoiVector(const std::string &input) {
+    std::vector<defs::ROI> rois;
+    std::stringstream ss(input);
+    std::string token;
+
+    while (std::getline(ss, token, ';')) {
+        token.erase(std::remove_if(token.begin(), token.end(), ::isspace),
+                    token.end());
+        if (token.empty())
+            continue;
+        if (token.front() != '[' || token.back() != ']') {
+            throw RuntimeError("Each ROI must be enclosed in square brackets: "
+                               "[xmin,xmax,ymin,ymax]");
+        }
+        token = token.substr(1, token.size() - 2); // remove brackets
+        std::vector<std::string> parts;
+        std::stringstream inner(token);
+        std::string num;
+        while (std::getline(inner, num, ',')) {
+            parts.push_back(num);
+        }
+
+        if (parts.size() != 4) {
+            throw RuntimeError("ROI must have 4 comma-separated integers");
+        }
+
+        defs::ROI roi;
+        roi.xmin = StringTo<int>(parts[0]);
+        roi.xmax = StringTo<int>(parts[1]);
+        roi.ymin = StringTo<int>(parts[2]);
+        roi.ymax = StringTo<int>(parts[3]);
+        rois.emplace_back(roi);
+    }
+    return rois;
+}
+
 std::string Caller::ratecorr(int action) {
     std::ostringstream os;
     if (action == defs::HELP_ACTION) {
diff --git a/slsDetectorSoftware/src/Detector.cpp b/slsDetectorSoftware/src/Detector.cpp
index 375faaeaa..785868e2d 100644
--- a/slsDetectorSoftware/src/Detector.cpp
+++ b/slsDetectorSoftware/src/Detector.cpp
@@ -1367,12 +1367,10 @@ void Detector::setRxArping(bool value, Positions pos) {
     pimpl->Parallel(&Module::setRxArping, pos, value);
 }
 
-std::vector<defs::ROI> Detector::getRxROI() const  {
-    return pimpl->getRxROI();
-}
+std::vector<defs::ROI> Detector::getRxROI() const { return pimpl->getRxROI(); }
 
 // RxROIs can be set for all types except CTB. At multi level without gap pixels
-void Detector::setRxROI(const std::vector<defs::ROI>& args) {
+void Detector::setRxROI(const std::vector<defs::ROI> &args) {
     pimpl->setRxROI(args);
 }
 
@@ -1380,7 +1378,6 @@ void Detector::clearRxROI() { pimpl->clearRxROI(); }
 
 int Detector::getNumberOfUdpPortsInRxROI() const {
     return pimpl->getNumberOfUdpPortsInRxROI();
-
 }
 
 // File
diff --git a/slsDetectorSoftware/src/DetectorImpl.cpp b/slsDetectorSoftware/src/DetectorImpl.cpp
index 6bd1ae8cc..34e58dc5f 100644
--- a/slsDetectorSoftware/src/DetectorImpl.cpp
+++ b/slsDetectorSoftware/src/DetectorImpl.cpp
@@ -31,7 +31,6 @@
 
 namespace sls {
 
-
 DetectorImpl::DetectorImpl(int detector_index, bool verify, bool update)
     : detectorIndex(detector_index), shm(detector_index, -1),
       ctb_shm(detector_index, -1, CtbConfig::shm_tag()) {
@@ -536,7 +535,7 @@ void DetectorImpl::readFrameFromReceiver() {
     bool quadEnable = false;
     // to flip image
     bool eiger = false;
-    std::array<int, 4> rxRoi {};//TODO: get roi from json header 
+    std::array<int, 4> rxRoi{}; // TODO: get roi from json header
 
     std::vector<bool> runningList(zmqSocket.size());
     std::vector<bool> connectList(zmqSocket.size());
@@ -1703,44 +1702,53 @@ std::vector<defs::ROI> DetectorImpl::getRxROI() const {
         throw RuntimeError("No Modules added");
     }
 
-    return std::vector<defs::ROI>{};
-//TODO
+    // return std::vector<defs::ROI>{};
+    return rxRoiTemp;
+    // TODO
 }
 
-bool DetectorImpl::roisOverlap(const defs::ROI& a, const defs::ROI& b) {
-    return !(a.xmax < b.xmin || a.xmin > b.xmax ||
-         a.ymax < b.ymin || a.ymin > b.ymax);
-
+bool DetectorImpl::roisOverlap(const defs::ROI &a, const defs::ROI &b) {
+    return !(a.xmax < b.xmin || a.xmin > b.xmax || a.ymax < b.ymin ||
+             a.ymin > b.ymax);
 }
 
-void DetectorImpl::validateROIs(const std::vector<defs::ROI>& rois) {
+void DetectorImpl::validateROIs(const std::vector<defs::ROI> &rois) {
     for (size_t i = 0; i < rois.size(); ++i) {
-        const auto& roi = rois[i];
+        const auto &roi = rois[i];
 
         if (roi.noRoi()) {
             throw RuntimeError("Invalid Roi of size 0. Roi: " + ToString(roi));
         }
         if (roi.completeRoi()) {
             throw RuntimeError("Did you mean the clear roi command (API: "
-                            "clearRxROI, cmd: rx_clearroi) Roi: " + ToString(roi) + "?");
+                               "clearRxROI, cmd: rx_clearroi) Roi: " +
+                               ToString(roi) + "?");
         }
         if (roi.xmin > roi.xmax || roi.ymin > roi.ymax) {
             throw RuntimeError(
-                "Invalid Roi. xmin/ymin exceeds xmax/ymax. Roi: " + ToString(roi));
+                "Invalid Roi. xmin/ymin exceeds xmax/ymax. Roi: " +
+                ToString(roi));
         }
 
         if (roi.xmin < 0 || roi.xmax >= shm()->numberOfChannels.x) {
-            throw RuntimeError("ROI x-dimension outside detector bounds. Roi: " + ToString(roi));
+            throw RuntimeError(
+                "ROI x-dimension outside detector bounds. Roi: " +
+                ToString(roi));
         }
 
         bool is2D = (modules[0]->getNumberOfChannels().y > 1 ? true : false);
         if (is2D) {
             if (roi.ymin < 0 || roi.ymax >= shm()->numberOfChannels.y) {
-                throw RuntimeError("ROI y-dimension outside detector bounds. Roi: " + ToString(roi));
+                throw RuntimeError(
+                    "ROI y-dimension outside detector bounds. Roi: " +
+                    ToString(roi));
             }
         } else {
-            if ((roi.ymin != -1 && roi.ymin != 0) || (roi.ymax != -1 && roi.ymax != 0)) {
-                throw RuntimeError("Invalid Y range for 1D detector: should be -1. Roi: " + ToString(roi));
+            if ((roi.ymin != -1 && roi.ymin != 0) ||
+                (roi.ymax != -1 && roi.ymax != 0)) {
+                throw RuntimeError(
+                    "Invalid Y range for 1D detector: should be -1. Roi: " +
+                    ToString(roi));
             }
         }
 
@@ -1753,7 +1761,7 @@ void DetectorImpl::validateROIs(const std::vector<defs::ROI>& rois) {
     }
 }
 
-void DetectorImpl::setRxROI(const std::vector<defs::ROI>& args) {
+void DetectorImpl::setRxROI(const std::vector<defs::ROI> &args) {
     if (shm()->detType == CHIPTESTBOARD ||
         shm()->detType == defs::XILINX_CHIPTESTBOARD) {
         throw RuntimeError("RxRoi not implemented for this Detector");
@@ -1761,18 +1769,18 @@ void DetectorImpl::setRxROI(const std::vector<defs::ROI>& args) {
     if (modules.size() == 0) {
         throw RuntimeError("No Modules added");
     }
-    
+
     validateROIs(args);
 
-//TODO
+    rxRoiTemp = args;
+
+    // TODO
 }
 
-void DetectorImpl::clearRxROI() {
-    ;// TODO: clear roi
-}
+void DetectorImpl::clearRxROI() { rxRoiTemp.clear(); }
 
 int DetectorImpl::getNumberOfUdpPortsInRxROI() const {
-    return 0;// TODO
+    return 0; // TODO
 }
 
 void DetectorImpl::getBadChannels(const std::string &fname,
diff --git a/slsDetectorSoftware/src/DetectorImpl.h b/slsDetectorSoftware/src/DetectorImpl.h
index c899566f2..b6a6af905 100644
--- a/slsDetectorSoftware/src/DetectorImpl.h
+++ b/slsDetectorSoftware/src/DetectorImpl.h
@@ -302,7 +302,7 @@ class DetectorImpl : public virtual slsDetectorDefs {
     verifyUniqueRxHost(const std::vector<std::string> &names) const;
 
     std::vector<defs::ROI> getRxROI() const;
-    void setRxROI(const std::vector<defs::ROI>& args);
+    void setRxROI(const std::vector<defs::ROI> &args);
     void clearRxROI();
     int getNumberOfUdpPortsInRxROI() const;
 
@@ -427,8 +427,8 @@ class DetectorImpl : public virtual slsDetectorDefs {
     void verifyUniqueHost(
         bool isDet, std::vector<std::pair<std::string, uint16_t>> &hosts) const;
 
-    bool roisOverlap(const defs::ROI& a, const defs::ROI& b);
-    void validateROIs(const std::vector<defs::ROI>& rois);
+    bool roisOverlap(const defs::ROI &a, const defs::ROI &b);
+    void validateROIs(const std::vector<defs::ROI> &rois);
 
     const int detectorIndex{0};
     SharedMemory<sharedDetector> shm{0, -1};
@@ -457,6 +457,8 @@ class DetectorImpl : public virtual slsDetectorDefs {
 
     void (*dataReady)(detectorData *, uint64_t, uint32_t, void *){nullptr};
     void *pCallbackArg{nullptr};
+
+    std::vector<defs::ROI> rxRoiTemp;
 };
 
 } // namespace sls
\ No newline at end of file
diff --git a/slsDetectorSoftware/src/Module.h b/slsDetectorSoftware/src/Module.h
index a687be6c3..c84fa378b 100644
--- a/slsDetectorSoftware/src/Module.h
+++ b/slsDetectorSoftware/src/Module.h
@@ -301,9 +301,9 @@ class Module : public virtual slsDetectorDefs {
     std::array<pid_t, NUM_RX_THREAD_IDS> getReceiverThreadIds() const;
     bool getRxArping() const;
     void setRxArping(bool enable);
-    //defs::ROI getRxROI() const;
-    //void setRxROI(const slsDetectorDefs::ROI arg);
-    //void setRxROIMetadata(const slsDetectorDefs::ROI arg);
+    // defs::ROI getRxROI() const;
+    // void setRxROI(const slsDetectorDefs::ROI arg);
+    // void setRxROIMetadata(const slsDetectorDefs::ROI arg);
 
     /**************************************************
      *                                                *
diff --git a/slsDetectorSoftware/tests/CMakeLists.txt b/slsDetectorSoftware/tests/CMakeLists.txt
index f70e393f2..d87f17ed0 100755
--- a/slsDetectorSoftware/tests/CMakeLists.txt
+++ b/slsDetectorSoftware/tests/CMakeLists.txt
@@ -5,7 +5,6 @@
 target_sources(tests PRIVATE 
     ${CMAKE_CURRENT_SOURCE_DIR}/test-SharedMemory.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/test-slsDetector.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/test-Roi.cpp
 
     ${CMAKE_CURRENT_SOURCE_DIR}/Caller/test-Caller.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/Caller/test-Caller-rx.cpp
diff --git a/slsDetectorSoftware/tests/Caller/test-Caller-rx.cpp b/slsDetectorSoftware/tests/Caller/test-Caller-rx.cpp
index fcf0de97d..82bc1e2af 100644
--- a/slsDetectorSoftware/tests/Caller/test-Caller-rx.cpp
+++ b/slsDetectorSoftware/tests/Caller/test-Caller-rx.cpp
@@ -494,6 +494,42 @@ TEST_CASE("rx_roi", "[.cmdcall]") {
             REQUIRE_THROWS(caller.call("rx_roi", {"-1", "-1"}, -1, PUT));
             REQUIRE_THROWS(
                 caller.call("rx_roi", {"10", "15", "25", "30"}, -1, PUT));
+            // vector of rois
+            {
+                std::ostringstream oss;
+                caller.call("rx_roi", {"[5, 10, -1, -1]; [25, 20, -1, -1]"}, -1,
+                            PUT, oss);
+                REQUIRE(oss.str() ==
+                        "rx_roi [5, 10, -1, -1]; [25, 20, -1, -1]\n");
+            }
+            REQUIRE_THROWS(caller.call(
+                "rx_roi", {"[5, 20, -1, -1; 25, 30 -1, -1]"}, -1, PUT));
+            REQUIRE_THROWS(caller.call(
+                "rx_roi", {"[5, 20, -1]; [25, 30 -1, -1]"}, -1, PUT));
+            // separated by space is allowed
+            REQUIRE_NOTHROW(caller.call(
+                "rx_roi", {"[5, 10, -1, -1]", "[25, 28, -1, -1]"}, -1, PUT));
+            REQUIRE_NOTHROW(caller.call("rx_roi",
+                                        {"[0, 10, -1, -1];[20, 30, -1, -1];[9, "
+                                         "10, -1, -1];[40, 50, -1, -1]"},
+                                        -1, PUT));
+            // overlapping rois
+            REQUIRE_THROWS(caller.call(
+                "rx_roi", {"[0, 10,-1, -1];[5, 15, -1, -1]"}, 0, PUT));
+            // xmin > xmax
+            REQUIRE_THROWS(caller.call("rx_roi", {"[12, 8, -1, -1]"}, 0, PUT));
+            // outside detector bounds
+            REQUIRE_THROWS(
+                caller.call("rx_roi", {"[95, 105, -1, -1]"}, 0, PUT));
+            // module level not allowed
+            REQUIRE_THROWS(caller.call(
+                "rx_roi", {"[5, 10, -1, -1]; [25, 28, -1, -1]"}, 0, PUT));
+            // square brackets missing
+            REQUIRE_THROWS(caller.call(
+                "rx_roi", {"[5, 20, -1, -1; 25, 30, -1, -1]"}, -1, PUT));
+            // invalid roi, 4 parts expected
+            REQUIRE_THROWS(caller.call(
+                "rx_roi", {"[5, 20, -1]; [25, 30, -1, -1]"}, -1, PUT));
         }
         // 2d
         else {
@@ -521,6 +557,39 @@ TEST_CASE("rx_roi", "[.cmdcall]") {
             }
             REQUIRE_THROWS(
                 caller.call("rx_roi", {"-1", "-1", "-1", "-1"}, -1, PUT));
+            // vector of rois
+            {
+                std::ostringstream oss;
+                caller.call("rx_roi", {"[5, 10, 20, 30]; [25, 28, 14, 15]"}, -1,
+                            PUT, oss);
+                REQUIRE(oss.str() ==
+                        "rx_roi [5, 10, 20, 30];[25, 28, 14, 15]\n");
+            }
+            // separated by space is allowed
+            REQUIRE_NOTHROW(caller.call(
+                "rx_roi", {"[5, 10, 20, 30]", "[25, 28, 14, 15]"}, -1, PUT));
+            REQUIRE_NOTHROW(caller.call("rx_roi",
+                                        {"[0, 10, 0, 10];[20, 30, 0, 10];[0, "
+                                         "10, 20, 30];[40, 50, 0, 10]"},
+                                        -1, PUT));
+            // overlapping rois
+            REQUIRE_THROWS(caller.call(
+                "rx_roi", {"[0, 10, 0, 10];[5, 15, 0, 10]"}, 0, PUT));
+            // xmin > xmax
+            REQUIRE_THROWS(caller.call("rx_roi", {"[12, 8, 0, 10]"}, 0, PUT));
+            // ymin > ymax
+            REQUIRE_THROWS(caller.call("rx_roi", {"[0, 10, 20, 5]"}, 0, PUT));
+            // outside detector bounds
+            REQUIRE_THROWS(caller.call("rx_roi", {"[95, 105, 0, 10]"}, 0, PUT));
+            // module level not allowed
+            REQUIRE_THROWS(caller.call(
+                "rx_roi", {"[5, 10, 20, 30]; [25, 28, 14, 15]"}, 0, PUT));
+            // square brackets missing
+            REQUIRE_THROWS(caller.call(
+                "rx_roi", {"[5, 20, 20, 30; 25, 30, 14, 15]"}, -1, PUT));
+            // invalid roi, 4 parts expected
+            REQUIRE_THROWS(caller.call(
+                "rx_roi", {"[5, 20, 20]; [25, 30, 14, 15]"}, -1, PUT));
         }
 
         for (int i = 0; i != det.size(); ++i) {
diff --git a/slsDetectorSoftware/tests/test-Roi.cpp b/slsDetectorSoftware/tests/test-Roi.cpp
deleted file mode 100644
index 9ce6c3b30..000000000
--- a/slsDetectorSoftware/tests/test-Roi.cpp
+++ /dev/null
@@ -1,84 +0,0 @@
-#include "catch.hpp"
-#include <string>
-
-#include <stdlib.h>
-
-#include "DetectorImpl.h"
-#include "sls/Detector.h"
-#include "Module.h"
-
-#include <fstream>
-
-namespace sls {
-
-TEST_CASE("ROI validation") {
-    DetectorImpl det(0, false, false);
-    det.addTestModule(slsDetectorDefs::JUNGFRAU);
-    std::cout << "size:"<< det.size() << std::endl;
-    DetectorImpl detector(0, false, false);
-
-    SECTION("Valid non-overlapping ROIs") {
-        std::vector<slsDetectorDefs::ROI> rois = {
-            {0, 10, 0, 10},
-            {20, 30, 0, 10},
-            {0, 10, 20, 30},
-            {40, 50, 0, 10}
-        };
-        REQUIRE_NOTHROW(DetectorImplTestHelper::testValidateRois(detector, rois));
-    }
-
-    SECTION("Overlapping ROIs should throw") {
-        std::vector<slsDetectorDefs::ROI> rois = {
-            {0, 10, 0, 10},
-            {5, 15, 0, 10} 
-        };
-        REQUIRE_THROWS_AS(DetectorImplTestHelper::testValidateRois(detector, rois),
-                          sls::RuntimeError);
-    }
-
-    SECTION("Invalid ROI (xmin > xmax)") {
-        std::vector<slsDetectorDefs::ROI> rois = {
-            {12, 8, 0, 10}
-        };
-        REQUIRE_THROWS_AS(DetectorImplTestHelper::testValidateRois(detector, rois),
-                          sls::RuntimeError);
-    }
-
-    SECTION("Invalid ROI (ymin > ymax)") {
-        std::vector<slsDetectorDefs::ROI> rois = {
-            {0, 10, 20, 5}
-        };
-        REQUIRE_THROWS_AS(DetectorImplTestHelper::testValidateRois(detector, rois),
-                          sls::RuntimeError);
-    }
-
-    SECTION("Invalid ROI (outside detector bounds)") {
-        // Assuming detector has 100x100 dimensions
-        detector.setNumberOfChannels({100, 100});
-        std::vector<slsDetectorDefs::ROI> rois = {
-            {95, 105, 0, 10} // xmax out of bounds
-        };
-        REQUIRE_THROWS_AS(DetectorImplTestHelper::testValidateRois(detector, rois),
-                          sls::RuntimeError);
-    }
-
-    SECTION("Valid ROI for 1D detector") {
-        detector.setNumberOfChannels({100, 1});
-        std::vector<slsDetectorDefs::ROI> rois = {
-            {10, 20, -1, -1}
-        };
-        REQUIRE_NOTHROW(DetectorImplTestHelper::testValidateRois(detector, rois));
-    }
-
-    SECTION("Invalid Y for 1D detector") {
-        detector.setNumberOfChannels({100, 1});
-        std::vector<slsDetectorDefs::ROI> rois = {
-            {10, 20, 0, 10} // Y should be -1 for 1D
-        };
-        REQUIRE_THROWS_AS(DetectorImplTestHelper::testValidateRois(detector, rois),
-                          sls::RuntimeError);
-    }
-}
-
-
-} // namespace sls
diff --git a/slsSupportLib/include/sls/ToString.h b/slsSupportLib/include/sls/ToString.h
index ea97a8436..55d6b628b 100644
--- a/slsSupportLib/include/sls/ToString.h
+++ b/slsSupportLib/include/sls/ToString.h
@@ -348,5 +348,23 @@ std::vector<T> StringTo(const std::vector<std::string> &strings) {
         result.push_back(StringTo<T>(s));
     return result;
 }
+/*
+template <typename T>
+std::string ToString(const std::vector<T> &vec) {
+    std::ostringstream oss;
+    oss << "[";
+    for (size_t i = 0; i < vec.size(); ++i) {
+        oss << vec[i];
+        if (i != vec.size() - 1)
+            oss << ", ";
+    }
+    oss << "]";
+    return oss.str();
+}*/
+
+/*template <typename T>
+std::ostream &operator<<(std::ostream &os, const std::vector<T> &v) {
+    return os << ToString(v);
+}*/
 
 } // namespace sls