Separate old OBD display project from vendor demo folder

- Move user sketches to 10-OBD-Display-2024/, one folder per sketch
- Keep 2-Program Example/Demo_Arduino vendor-only, single docs/ copy
- Remove duplicate screenshots/instructions and ELMulator zip
- Archive broken LVGL 9 attempt

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

10-OBD-Display-2024/elmulator/examples/ESP32_Custom_ELMulator/OBDSerialComm.h

@@ -0,0 +1,90 @@
+#ifndef ELMulator_OBDSerialComm_h
+#define ELMulator_OBDSerialComm_h
+
+#include <Arduino.h>
+#include "definitions.h"
+
+#include <BluetoothSerial.h>
+
+
+class OBDSerialComm
+{
+public:
+    enum STATUS
+    {
+        IDLE = 0,
+        READY = 1
+    };
+
+// // Bluetooth is not built in, we are using a BT module via GPIO
+//     OBDSerialComm(uint32_t baudRate, uint8_t rxPin, uint8_t txPin);
+
+    OBDSerialComm();
+
+    ~OBDSerialComm();
+
+    void init(const String &deviceName);
+
+    void writeEndOK();
+
+    void writeEndERROR();
+
+    /**
+     * Response for unsupported PID command or missing sensor, respond "NO DATA".
+     */
+    void writeEndNoData();
+
+    /**
+     * Response for invalid AT command, or invalid PID or other bad input, respond "?"
+     */
+    void writeEndUnknown();
+
+    void setToDefaults();
+
+    void readData(String &rxData);
+
+    void writeTo(uint8_t cChar);
+
+    void writeTo(char const *string);
+
+    void setEcho(bool echo);
+
+    void writeEnd();
+
+    bool isEchoEnable();
+
+    void setLineFeeds(bool status);
+
+    void setMemory(bool status);
+
+    void setWhiteSpaces(bool status);
+
+    void setHeaders(bool status);
+
+    void setStatus(STATUS status);
+
+    void writeEndPidTo(char const *string);
+
+private:
+    uint32_t baudRate; // Serial Baud Rate
+    STATUS status;     // Operation status
+    bool echoEnable;   // echoEnable command after received
+    bool lineFeedEnable;
+    bool memoryEnabled;
+    bool whiteSpacesEnabled;
+    bool headersEnabled;
+
+    void setBaudRate(uint32_t rate);
+
+    long getBaudRate();
+
+    void addSpacesToResponse(const char *response, char string[]);
+
+#ifndef BLUETOOTH_BUILTIN
+    HardwareSerial *serial; // lib to communicate with bluetooth
+#else
+    BluetoothSerial *serial;
+#endif
+};
+
+#endif