From c92745d2bc2b2f232eca98faf0ce45f4de7767cb Mon Sep 17 00:00:00 2001
From: Ayzen <ayzen>
Date: Wed, 22 Apr 2026 13:00:32 +0300
Subject: [PATCH] microfix and bat file added

---
 laser_control/protocol.py |  4 +++
 run_device_main.bat       | 65 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+)
 create mode 100644 run_device_main.bat

diff --git a/laser_control/protocol.py b/laser_control/protocol.py
index 367b0d7..368d5d8 100644
--- a/laser_control/protocol.py
+++ b/laser_control/protocol.py
@@ -215,9 +215,13 @@ class Protocol:
     # ---- Raw I/O
 
     def send_raw(self, data: bytes) -> None:
+        if self._serial is None or not self._serial.is_open:
+            raise CommunicationError("Serial port is not connected")
         self._serial.write(data)
 
     def receive_raw(self, length: int) -> bytes:
+        if self._serial is None or not self._serial.is_open:
+            raise CommunicationError("Serial port is not connected")
         return self._serial.read(length)
 
     # ---- Static encoding helpers (no connection required) ---------------
diff --git a/run_device_main.bat b/run_device_main.bat
new file mode 100644
index 0000000..1239281
--- /dev/null
+++ b/run_device_main.bat
@@ -0,0 +1,65 @@
+@echo off
+setlocal
+
+set "PROJECT_DIR=%~dp0"
+pushd "%PROJECT_DIR%" >nul || (
+    echo Failed to switch to project directory: %PROJECT_DIR%
+    exit /b 1
+)
+
+set "VENV_DIR=.venv"
+set "VENV_PYTHON=%VENV_DIR%\Scripts\python.exe"
+set "VENV_ACTIVATE=%VENV_DIR%\Scripts\activate.bat"
+
+if exist "%VENV_PYTHON%" goto venv_ready
+
+echo Creating virtual environment...
+call :find_python
+if errorlevel 1 goto :error
+
+"%PYTHON_EXE%" %PYTHON_ARGS% -m venv "%VENV_DIR%"
+if errorlevel 1 goto :error
+
+:venv_ready
+
+call "%VENV_ACTIVATE%"
+if errorlevel 1 goto :error
+
+if exist "requirements.txt" (
+    echo Installing dependencies...
+    python -m pip install --disable-pip-version-check -r requirements.txt
+    if errorlevel 1 goto :error
+) else (
+    echo requirements.txt not found. Skipping dependency installation.
+)
+
+echo Starting _device_main.py...
+python _device_main.py
+set "EXIT_CODE=%ERRORLEVEL%"
+
+popd >nul
+exit /b %EXIT_CODE%
+
+:find_python
+where py >nul 2>&1
+if not errorlevel 1 (
+    set "PYTHON_EXE=py"
+    set "PYTHON_ARGS=-3"
+    exit /b 0
+)
+
+where python >nul 2>&1
+if not errorlevel 1 (
+    set "PYTHON_EXE=python"
+    set "PYTHON_ARGS="
+    exit /b 0
+)
+
+echo Python 3 was not found. Install Python and try again.
+exit /b 1
+
+:error
+set "EXIT_CODE=%ERRORLEVEL%"
+echo Script failed with exit code %EXIT_CODE%.
+popd >nul
+exit /b %EXIT_CODE%