diff --git a/.vscode/launch.json b/.vscode/launch.json
index 7e724e0..e0bf49c 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -51,6 +51,30 @@
           "ignoreFailures": true
         }
       ]
+    },
+    {
+      // Локальний debug стартера ДЗ 5. preLaunchTask збирає debug preset.
+      "name": "Debug homework_05: telemetry_check",
+      "type": "cppdbg",
+      "request": "launch",
+      "program": "${workspaceFolder}/build/debug/homework_05/telemetry_check",
+      "args": [
+        "${workspaceFolder}/homework_05/data/good.txt"
+      ],
+      "stopAtEntry": false,
+      "cwd": "${workspaceFolder}",
+      "environment": [],
+      "externalConsole": false,
+      "MIMode": "gdb",
+      "miDebuggerPath": "/usr/bin/gdb",
+      "preLaunchTask": "CMake: configure and build",
+      "setupCommands": [
+        {
+          "description": "Увімкнути pretty-printing для STL типів у GDB.",
+          "text": "-enable-pretty-printing",
+          "ignoreFailures": true
+        }
+      ]
     }
   ]
-}
+}
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 79f396b..19f96e9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,6 +16,7 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 # Домашні роботи. По мірі появи додаємо кожну окремим add_subdirectory.
 add_subdirectory(homework_04)
+add_subdirectory(homework_05)
 
 # Demo-код для заняття 2.4: локальне і віддалене відлагодження через GDB.
 add_subdirectory(demos/lesson_2_4/debug_probe)
diff --git a/CMakePresets.json b/CMakePresets.json
index f7f4f45..9fb8554 100644
--- a/CMakePresets.json
+++ b/CMakePresets.json
@@ -26,6 +26,26 @@
         "CMAKE_BUILD_TYPE": "Debug",
         "CMAKE_TOOLCHAIN_FILE": "${sourceDir}/cmake/toolchains/aarch64-linux-gnu.cmake"
       }
+    },
+    {
+      "name": "release",
+      "displayName": "Release",
+      "description": "Release build без debug символів.",
+      "generator": "Ninja",
+      "binaryDir": "${sourceDir}/build/release",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Release"
+      }
+    },
+    {
+      "name": "relwithdebinfo",
+      "displayName": "Release with Debug Info",
+      "description": "Release build із debug символами.",
+      "generator": "Ninja",
+      "binaryDir": "${sourceDir}/build/relwithdebinfo",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "RelWithDebInfo"
+      }
     }
   ],
   "buildPresets": [
@@ -40,6 +60,18 @@
       "displayName": "Build ARM64 Debug",
       "description": "Зібрати ARM64 debug preset після cross-configure.",
       "configurePreset": "aarch64-debug"
+    },
+    {
+      "name": "release",
+      "displayName": "Build Release",
+      "description": "Зібрати release preset після configure.",
+      "configurePreset": "release"
+    },
+    {
+      "name": "relwithdebinfo",
+      "displayName": "Build RelWithDebInfo",
+      "description": "Зібрати relwithdebinfo preset після configure.",
+      "configurePreset": "relwithdebinfo"
     }
   ]
 }
diff --git a/homework_05/CMakeLists.txt b/homework_05/CMakeLists.txt
new file mode 100644
index 0000000..3ef0de7
--- /dev/null
+++ b/homework_05/CMakeLists.txt
@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 3.20)
+project(telemetry_check  CXX)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+add_library(telemetry STATIC src/telemetry.cpp)
+target_include_directories(telemetry PUBLIC include)
+
+add_executable(telemetry_check  src/main.cpp)
+target_link_libraries(telemetry_check  PRIVATE telemetry)
diff --git a/homework_05/include/telemetry.hpp b/homework_05/include/telemetry.hpp
index 0cdf002..5fd6d4e 100644
--- a/homework_05/include/telemetry.hpp
+++ b/homework_05/include/telemetry.hpp
@@ -12,6 +12,7 @@ struct Frame {
     double temperature_c;
     int gps_fix;
     int satellites;
+    bool error;
 };
 
 // Aggregated values printed by the executable.
diff --git a/homework_05/src/main.cpp b/homework_05/src/main.cpp
index 43ec461..b284e0b 100644
--- a/homework_05/src/main.cpp
+++ b/homework_05/src/main.cpp
@@ -12,6 +12,10 @@ int main(int argc, char** argv) {
     Frame frames[MAX_TELEMETRY_FRAMES];
     const int frame_count = read_frames(argv[1], frames, MAX_TELEMETRY_FRAMES);
 
+    if (frame_count == -1) {
+        return 1;
+    }
+
     const Summary summary = summarize(frames, frame_count);
     print_summary(summary);
 
diff --git a/homework_05/src/telemetry.cpp b/homework_05/src/telemetry.cpp
index 9ac87fc..0749b4c 100644
--- a/homework_05/src/telemetry.cpp
+++ b/homework_05/src/telemetry.cpp
@@ -11,6 +11,7 @@
 
 const int EXPECTED_FIELD_COUNT = 7;
 const int MAX_LINE_LENGTH = 256;
+const int TEMP_RANGE[] = {-40, 120};
 
 int split_line(char line[], char* fields[], int max_fields) {
     int count = 0;
@@ -43,7 +44,7 @@ long parse_long(const char* text) {
     const long value = std::strtol(text, &end, 10);
 
     if (end == text) {
-        std::abort();
+        throw std::invalid_argument("invalid long value: \"" + std::string(text) + '"');
     }
 
     return value;
@@ -58,25 +59,41 @@ double parse_double(const char* text) {
     const double value = std::strtod(text, &end);
 
     if (end == text) {
-        std::abort();
+        throw std::invalid_argument("invalid double value: \"" + std::string(text) + '"');
     }
 
     return value;
 }
 
-Frame parse_frame(char line[]) {
+Frame parse_frame(char line[], int frame_index) {
     char* fields[EXPECTED_FIELD_COUNT] = {};
     const int field_count = split_line(line, fields, EXPECTED_FIELD_COUNT);
     (void)field_count;
 
     Frame frame{};
-    frame.timestamp_ms = parse_long(fields[0]);
-    frame.seq = parse_int(fields[1]);
-    frame.voltage_v = parse_double(fields[2]);
-    frame.current_a = parse_double(fields[3]);
-    frame.temperature_c = parse_double(fields[4]);
-    frame.gps_fix = parse_int(fields[5]);
-    frame.satellites = parse_int(fields[6]);
+
+    for (int i = 0; i < EXPECTED_FIELD_COUNT; ++i) {
+        if (fields[i] == nullptr) {
+            std::cerr << "error: invalid frame at line " << frame_index + 1 << ": missing field " << std::endl;
+            frame.error = true;
+
+            return frame;
+        }
+    }
+
+    try {
+        frame.timestamp_ms = parse_long(fields[0]);
+        frame.seq = parse_int(fields[1]);
+        frame.voltage_v = parse_double(fields[2]);
+        frame.current_a = parse_double(fields[3]);
+        frame.temperature_c = parse_double(fields[4]);
+        frame.gps_fix = parse_int(fields[5]);
+        frame.satellites = parse_int(fields[6]);
+    } catch (const std::invalid_argument& e) {
+        std::cerr << "error: invalid frame " << frame_index + 1 << ": " << e.what() << std::endl;
+        frame.error = true;
+    }
+    
     return frame;
 }
 
@@ -90,7 +107,7 @@ int read_frames(const char* path, Frame frames[], int max_frames) {
     std::ifstream input{path};
     if (!input) {
         std::cerr << "error: failed to open input file: " << path << '\n';
-        return 0;
+        return -1;
     }
 
     int frame_count = 0;
@@ -102,11 +119,66 @@ int read_frames(const char* path, Frame frames[], int max_frames) {
         }
 
         if (frame_count < max_frames) {
-            frames[frame_count] = parse_frame(line);
+            frames[frame_count] = parse_frame(line, frame_count);
+            if (frame_count > 0) {
+                if (frames[frame_count].seq != frames[frame_count - 1].seq + 1) {
+                    std::cerr << "error: invalid frame at line " << frame_count + 1
+                                << ": non-sequential frame index " << frames[frame_count].seq
+                                << " after " << frames[frame_count - 1].seq << std::endl;
+                    frames[frame_count].error = true;
+                }
+
+                if (frames[frame_count].timestamp_ms <= frames[frame_count - 1].timestamp_ms) {
+                    std::cerr << "error: invalid frame at line " << frame_count + 1
+                                << ": non-monotonic timestamp " << frames[frame_count].timestamp_ms
+                                << " after " << frames[frame_count - 1].timestamp_ms << std::endl;
+                    frames[frame_count].error = true;
+                }
+
+                if (frames[frame_count].voltage_v <= 0.0) {
+                    std::cerr << "error: invalid frame at line " << frame_count + 1
+                                << ": voltage must be positive, got " << frames[frame_count].voltage_v
+                                << std::endl;
+                    frames[frame_count].error = true;
+                }
+
+                if (frames[frame_count].temperature_c < TEMP_RANGE[0] ||
+                    frames[frame_count].temperature_c > TEMP_RANGE[1]) {
+                    std::cerr << "error: invalid frame at line " << frame_count + 1
+                                << ": temperature out of range [" << TEMP_RANGE[0] << ", "
+                                << TEMP_RANGE[1] << "], got " << frames[frame_count].temperature_c
+                                << std::endl;
+                    frames[frame_count].error = true;
+                }
+
+                if (frames[frame_count].gps_fix != 0 && frames[frame_count].gps_fix != 1) {
+                    std::cerr << "error: invalid frame at line " << frame_count + 1
+                                << ": gps_fix must be in range [0, 1], got " << frames[frame_count].gps_fix
+                                << std::endl;
+                    frames[frame_count].error = true;
+                }
+
+                if (frames[frame_count].satellites < 0) {
+                    std::cerr << "error: invalid frame at line " << frame_count + 1
+                                << ": satellites must be non-negative, got " << frames[frame_count].satellites
+                                << std::endl;
+                    frames[frame_count].error = true;
+                }
+            }
+
+            if (frames[frame_count].error) {
+                return -1;
+            }
+
             ++frame_count;
         }
     }
 
+    if (frame_count == 0) {
+        std::cerr << "error: zero telemetery frames provided in file: " << path << std::endl;
+        return -1;
+    }
+
     return frame_count;
 }