added interface class with strong auto-detection

app/caaarController.hpp

@@ -0,0 +1,77 @@
+#include <iostream>
+#include <optional>
+#include <vector>
+#include <filesystem>
+#include <CppLinuxSerial.h>
+
+class CaaarController {
+public:
+    CaaarController(const std::string& port)
+        : serialPort(port, LibSerial::SerialStreamBuf::BAUD_9600) {
+    }
+
+
+    std::optional<std::string> autoDetect() {
+        std::filesystem::path basePath("/dev");
+
+        for (const auto& entry : std::filesystem::directory_iterator(basePath)) {
+            const auto& path = entry.path();
+            if (path.filename().string().substr(0, 6) == "ttyACM" || path.filename().string().substr(0, 6) == "ttyUSB") {
+                serialPort.Open(path);
+                if (serialPort.good()) {
+                    if (detect()) {
+                        return path;
+                    }
+                    serialPort.Close();
+                }
+            }
+        }
+
+        return std::nullopt;
+    }
+
+
+        for (const auto& port : possiblePorts) {
+            serialPort.Open(port);
+            if (serialPort.good()) {
+                if (detect()) {
+                    return true;
+                }
+                serialPort.Close();
+            }
+        }
+
+        return false;
+    }
+
+    bool detect() {
+        sendCommand("$");
+        std::string response = readResponse();
+        return response == "$b29b3875-2e31-4b13-991f-08b7f62c141b";
+    }
+
+    void setLEDMode(int mode) {
+        sendCommand("l" + std::to_string(mode));
+    }
+
+    void setLEDColor(int index, int r, int g, int b) {
+        sendCommand("l" + std::to_string(index) + " " + std::to_string(r) + "," + std::to_string(g) + "," + std::to_string(b));
+    }
+
+    void setServoDutyCycle(int servo, int dutyCycle) {
+        sendCommand("s" + std::to_string(servo) + " " + std::to_string(dutyCycle));
+    }
+
+private:
+    void sendCommand(const std::string& command) {
+        serialPort << command << std::endl;
+    }
+
+    std::string readResponse() {
+        std::string response;
+        std::getline(serialPort, response);
+        return response;
+    }
+
+    LibSerial::SerialStream serialPort;
+};

piconaut-caaar.ino

@@ -122,7 +122,9 @@ void handleSerialCommands() {
   if (Serial.available() > 0) {
     String command = Serial.readStringUntil('\n');
     command.trim();
-
+    if (command[0] = '$') {
+      Serial.println("$b29b3875-2e31-4b13-991f-08b7f62c141b");
+    }
     if (command.startsWith("l")) {
       if (command == "l1") {
         setLEDDefaultColors();