diff --git a/gui/Makefile b/gui/Makefile
new file mode 100644
index 0000000..419ed33
--- /dev/null
+++ b/gui/Makefile
@@ -0,0 +1,15 @@
+CXX = clang++-10
+CXXFLAGS = --std=c++20 -Wall -Wextra -pedantic
+
+CXXFILES = $(wildcard *.cpp)
+
+OUTELF = stmdspgui
+
+all: $(CXXFILES)
+	@echo "  CXX    " $(CXXFILES)
+	@$(CXX) $(CXXFLAGS) $(CXXFILES) -o $(OUTELF)
+
+clean:
+	@echo "  CLEAN"
+	@rm -f $(OUTELF)
+
diff --git a/gui/main.cpp b/gui/main.cpp
new file mode 100644
index 0000000..48f2990
--- /dev/null
+++ b/gui/main.cpp
@@ -0,0 +1,15 @@
+#include "stmdsp.hpp"
+
+#include <iostream>
+
+int main()
+{
+    stmdsp::scanner scanner;
+
+    scanner.scan();
+    for (const auto& device : scanner.devices())
+        std::cout << "Found stmdsp at: " << device.path() << std::endl;
+
+    return 0;
+}
+
diff --git a/gui/stmdsp.cpp b/gui/stmdsp.cpp
new file mode 100644
index 0000000..267bebc
--- /dev/null
+++ b/gui/stmdsp.cpp
@@ -0,0 +1,31 @@
+#include "stmdsp.hpp"
+
+#include <chrono>
+#include <filesystem>
+#include <thread>
+
+using namespace std::chrono_literals;
+
+namespace stmdsp
+{
+    void scanner::scan()
+    {
+        std::string path ("/dev/ttyACM0");
+
+        for (unsigned int i = 0; i < 10; i++) {
+            path.back() = '0' + i;
+            if (std::filesystem::exists(path)) {
+                if (device dev (path); dev.open()) {
+                    dev.write("i", 1);
+                    std::this_thread::sleep_for(1s);
+                    char buf[7];
+                    if (dev.read(buf, 6) ==	6) {
+                        buf[6] = '\0';
+                        if (std::string(buf) == "stmdsp")
+                            m_devices.emplace(std::move(dev));
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/gui/stmdsp.hpp b/gui/stmdsp.hpp
new file mode 100644
index 0000000..12e4578
--- /dev/null
+++ b/gui/stmdsp.hpp
@@ -0,0 +1,60 @@
+#ifndef STMDSPSCANNER_H
+#define STMDSPSCANNER_H
+
+#include <fstream>
+#include <set>
+#include <string>
+
+namespace stmdsp
+{
+    class device
+    {
+    public:
+        device(const std::string& path) :
+            m_path(path) {}
+
+        bool open() {
+            m_stream.open(m_path, std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+            return m_stream.is_open();
+        }
+
+        std::size_t read(char *buffer, std::size_t count) {
+            return m_stream.readsome(buffer, count);
+        }
+
+        std::size_t write(const char *buffer, std::size_t count) {
+            m_stream.write(buffer, count);
+            return m_stream.good() ? count : 0;
+        }
+
+        const std::string& path() const {
+            return m_path;
+        }
+
+        auto operator<=>(const device& other) const {
+            return m_path <=> other.m_path;
+        }
+
+    private:
+        std::string m_path;
+        std::fstream m_stream;
+    };
+
+    class scanner
+    {
+    private:
+        constexpr static unsigned int STMDSP_VENDOR_ID = 0x0483;
+        constexpr static unsigned int STMDSP_DEVICE_ID = 0x5740;
+
+    public:
+        void scan();
+        const auto& devices() const {
+            return m_devices;
+        }
+
+    private:
+        std::set<device> m_devices;
+    };
+}
+
+#endif // STMDSPSCANNER_H