diff --git a/.gitignore b/.gitignore
index d0c4049..eb6cdde 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
+.cache/
 build/
 *.zip
-
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3f7bd4f..947b82d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,6 +9,8 @@ set(CMAKE_C_STANDARD_REQUIRED ON)
 set(CMAKE_C_EXTENSIONS OFF)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
+# set(CMAKE_BUILD_TYPE Release) 
+
 add_executable(${PROJECT_NAME} ${SOURCE_DIR}/main.c)
 
 set(HEADERS 
@@ -34,4 +36,5 @@ target_include_directories(${PROJECT_NAME} PRIVATE ${HEADERS})
 
 target_sources(${PROJECT_NAME} PRIVATE ${SOURCES})
 
+target_compile_options(${PROJECT_NAME} PRIVATE -O0 -Wall -Wextra)
 set_target_properties(${PROJECT_NAME} PROPERTIES RUNTIME_OUTPUT_DIRECTORY "bin")
diff --git a/src/hdlc/hdlc_type.h b/src/hdlc/hdlc_type.h
index 46bc790..99ab948 100644
--- a/src/hdlc/hdlc_type.h
+++ b/src/hdlc/hdlc_type.h
@@ -14,9 +14,12 @@
 #define HDLC_INFO_LENGTH 16
 #define HDLC_PACKET_LENGTH 2+2+HDLC_INFO_LENGTH+2
 
+#define HDLC_PACKET_FLAG 0x7e
+#define HDLC_PACKET_ESCAPE 0xab
+
 // Структура пакета (фрейма) HDLC
 typedef struct {
-  const uint8_t flag;
+  // const uint8_t flag;
   uint16_t address;
   uint16_t control;
   uint8_t info[HDLC_INFO_LENGTH];
diff --git a/src/main.c b/src/main.c
index ece7f28..24e24ed 100644
--- a/src/main.c
+++ b/src/main.c
@@ -21,7 +21,7 @@ const char* bigLoopOsStateNames[OS_last] = {
 // BIG LOOP OS
 int main(void) {
   bigLoopOsState = OS_first;
-  while(1) {
+  while(true) {
     if (bigLoopOsState == OS_last) {
       bigLoopOsState = OS_first;
     }
diff --git a/src/worker/worker.c b/src/worker/worker.c
index 09a36d2..722e08a 100644
--- a/src/worker/worker.c
+++ b/src/worker/worker.c
@@ -11,10 +11,22 @@ int WORK_preparePackage(workerHost_s *worker) {
   printf("WORKX: .. Preparing package\n");
   worker->packet->control = 0b0100110011110000;
   WORK_fillBuffer8b(worker->packet->info, HDLC_INFO_LENGTH);
-  // memcpy(packet->info, testInfo, HDLC_INFO_LENGTH);
   worker->packet->fcs = CRC16_compute(worker->packet->info, HDLC_INFO_LENGTH);
-  return 0;
 
+  // Перемещение структуры в массив на передачу
+  size_t structSize = sizeof(hdlcPacket_s);
+  uint8_t tmpPtr = 0;
+  uint8_t *packPtr = (uint8_t*)&worker->packet;
+  for (size_t s = 0; s < structSize; s++, tmpPtr++) {
+    // Нашли флаг в теле сообщения
+    if (packPtr[s] == HDLC_PACKET_FLAG) {
+      worker->byteBuffer[tmpPtr] = HDLC_PACKET_ESCAPE;
+      tmpPtr++;
+    }
+    worker->byteBuffer[tmpPtr] = packPtr[s];
+  }
+
+  return 0;
 }
 
 
@@ -39,35 +51,46 @@ int WORK_waitPackage(workerHost_s *worker) {
 int WORK_receivePackage(workerHost_s *worker) {
   printf("WORKX: .. Receiving package\n");
   // Receiving in buffer
+  
+  if (DO_UNIT_TESTS){WORK_testFill(worker->byteBuffer, WORK_BYTE_BUFFER_SIZE); return 0;} 
+  
   uint8_t buf;
   if (FIFO_get(worker->fifo, &buf) == 0) {
     // return 0;
   }
   
   return -1;
-
-  if (DO_UNIT_TESTS){WORK_testFill(worker->byteBuffer, WORK_BYTE_BUFFER_SIZE);}
-  
-  return 0;
 }
 
 
 int WORK_parsePackage(workerHost_s *worker) {
   printf("WORKX: .. Parsing package\n");
-  
-  uint8_t *first = NULL, *last = NULL;
+
   // Поиск пакета в массиве 
-  for (size_t i = 0; i < WORK_BYTE_BUFFER_SIZE; i++) {
-    if (worker->byteBuffer[i] == worker->packet->flag) {
+  uint8_t *first = NULL, *last = NULL;
+  uint8_t tmpBuf[WORK_BYTE_BUFFER_SIZE] = {0};
+  uint8_t bufPtr=0;
+  for (size_t s = 0; s < WORK_BYTE_BUFFER_SIZE; s++, bufPtr++) {
+    // Найден флаг
+    if (worker->byteBuffer[bufPtr] == HDLC_PACKET_FLAG) {
       if (!first) {
-        first = &worker->byteBuffer[i];
+        first = &tmpBuf[s];
         first++; // Скипаем байт флага
       } else if (!last) {
-        last = &worker->byteBuffer[i];
+        last = &tmpBuf[s];
         last--;
       }
     }
+
+    // Найден escape-флаг
+    if (worker->byteBuffer[bufPtr] == HDLC_PACKET_ESCAPE) {
+      if (worker->byteBuffer[bufPtr+1] == HDLC_PACKET_FLAG) {
+        bufPtr++;
+      }
+    }
+    tmpBuf[s] = worker->byteBuffer[bufPtr];
   }
+  
 
   // Разбор пакета в структуру
   if (first && last) {
@@ -106,11 +129,16 @@ int WORK_parsePackage(workerHost_s *worker) {
           }
         }
       }
-    }
-  }
+    } // (last > first)
+  } // (first && last)
 
-  // HDLC_parseControlField (worker->packet->control);
-  // printf("WORKX: .. Info value: %d\n", field.value);
+  memset(worker->byteBuffer, 0, WORK_BYTE_BUFFER_SIZE);
+  memcpy(worker->byteBuffer, tmpBuf, WORK_BYTE_BUFFER_SIZE);
+
+  for (uint8_t i = 0; i < WORK_BYTE_BUFFER_SIZE/2; i++) {
+    printf("0x%d, ", worker->byteBuffer[i]);
+  }
+  printf("\n");
 
   return 0;
 }
diff --git a/src/worker/worker.h b/src/worker/worker.h
index b714d86..48beb7f 100644
--- a/src/worker/worker.h
+++ b/src/worker/worker.h
@@ -33,7 +33,7 @@ int WORK_parsePackage(workerHost_s *worker);
 
 int WORK_fillBuffer8b(uint8_t *buffer, size_t size);
 
-// toolsNtests
+// tools and tests
 int WORK_printBlocks(workerHost_s *worker, uint8_t mode);
 int WORK_testFill(uint8_t* buffer, size_t bufferSize);
 int WORK_testFifo(fifo_s *fifo);
diff --git a/src/worker/worker_master.c b/src/worker/worker_master.c
index 3bd8ec6..4ed7cd4 100644
--- a/src/worker/worker_master.c
+++ b/src/worker/worker_master.c
@@ -4,7 +4,7 @@
 
 #include <string.h>
 
-static hdlcPacket_s hdlcMasterPacket = {hdlcFlag, hdlcMasterAddress};
+static hdlcPacket_s hdlcMasterPacket = {hdlcMasterAddress};
 static fifo_s hdlcMasterFifo;
 static workerHost_s hdlcMaster = {0};
 static uint8_t masterBuffer[WORK_BYTE_BUFFER_SIZE];
diff --git a/src/worker/worker_slave.c b/src/worker/worker_slave.c
index 1851d5c..82d10b8 100644
--- a/src/worker/worker_slave.c
+++ b/src/worker/worker_slave.c
@@ -1,7 +1,7 @@
 #include "main.h"
 #include "worker.h"
 
-static hdlcPacket_s hdlcSlavePacket = {hdlcFlag, hdlcSlaveAddress};
+static hdlcPacket_s hdlcSlavePacket = {hdlcSlaveAddress};
 static fifo_s hdlcSlaveFifo;
 static workerHost_s hdlcSlave = {0};
 
@@ -11,7 +11,7 @@ workerHost_s* WORK_slaveInit () {
     hdlcSlave.packet = &hdlcSlavePacket;
     hdlcSlave.fifo = &hdlcSlaveFifo;
     hdlcSlave.isInitialized = true;
-    printf("WSLAV Slave initialization done\n");
+    printf("WSLAV: Slave initialization done\n");
     WORK_printBlocks(&hdlcSlave, 3);
   }
   
diff --git a/src/worker/worker_tools.c b/src/worker/worker_tools.c
index de456da..e574ce2 100644
--- a/src/worker/worker_tools.c
+++ b/src/worker/worker_tools.c
@@ -1,5 +1,12 @@
 #include "worker.h"
 
+#define ARRAY_SIZE(array) sizeof(array)/sizeof(array[0])
+
+static inline void WORK_printArray (uint8_t* array, size_t size) {
+  for (size_t s = 0; s < size; s++) { 
+    printf("%d", array[s]); 
+  } 
+}
 
 // Параметрический вывод пакета worker
 int WORK_printBlocks(workerHost_s *worker, uint8_t mode) {
@@ -15,9 +22,11 @@ int WORK_printBlocks(workerHost_s *worker, uint8_t mode) {
   if (mode & 1) {
     printf("TOOL: .. Packet:\n");
     printf("TOOL: .... Address: %d \n", worker->packet->address);
-    printf("TOOL: .... Flag: %d  \n", worker->packet->flag);
+    // printf("TOOL: .... Flag: %d  \n", worker->packet->flag);
     printf("TOOL: .... Conrol Field: %d  \n", worker->packet->control);
-    printf("TOOL: .... Info Field: %d  \n", worker->packet->info);
+    printf("TOOL: .... Info Field: ");
+    WORK_printArray(worker->packet->info, ARRAY_SIZE(worker->packet->info));
+    printf("\n");
     printf("TOOL: .... FCS: %d  \n", worker->packet->fcs);
   }
 
@@ -26,7 +35,7 @@ int WORK_printBlocks(workerHost_s *worker, uint8_t mode) {
     size_t size = sizeof(worker->fifo->data) / sizeof(worker->fifo->data[0]);
 
     printf("TOOL: .. FIFO:\n");
-    printf("TOOL: .... Data (%d items): ", size);
+    printf("TOOL: .... Data (%d items): ", (int)size);
     for (size_t i = 0; i < size; i++) {
       printf("%02X ", worker->fifo->data[i]);
     }
@@ -41,14 +50,17 @@ int WORK_printBlocks(workerHost_s *worker, uint8_t mode) {
 
 // Тестовое заполнение буфера
 int WORK_testFill(uint8_t* buffer, size_t bufferSize) {
+  bufferSize++;
   static uint8_t testbuffer[50] = {
     0xaa,0xbb,
-    0x7e,
+    HDLC_PACKET_FLAG,
     0xa1, 0xa2,
     0xc1, 0xc2,
-    0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xde,
+    0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 
+    HDLC_PACKET_ESCAPE, HDLC_PACKET_FLAG,
+    0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xde,
     0xcc, 0xcd,
-    0x7e
+    HDLC_PACKET_FLAG
   };
   for (int i = 0; i < 50; i++) {
     buffer[i] = testbuffer[i];
@@ -57,6 +69,7 @@ int WORK_testFill(uint8_t* buffer, size_t bufferSize) {
 }
 
 
+// Тестирование фифо
 int WORK_testFifo(fifo_s *fifo) {
   printf("TEST: FIFO START:\n");
     
@@ -64,14 +77,16 @@ int WORK_testFifo(fifo_s *fifo) {
   FIFO_put(fifo, 3);
   FIFO_put(fifo, 8);
   FIFO_print(fifo);
+
   uint8_t arr[10] = {0};
   for (int a = 0; a < 10; a++) {
     FIFO_get(fifo, &arr[a]);
     printf("%d:", arr[a]);
   }
-  printf("\n");
 
+  printf("\n");
   printf("TEST: FIFO END:\n");
+  return 0;
 }
 
 
@@ -81,5 +96,6 @@ int WORK_fillBuffer8b(uint8_t *buffer, size_t size) {
   for (size_t i = 0; i < size; i++) {
     buffer[i] = i;
   }
+  buffer[size/2] = HDLC_PACKET_FLAG;
   return 0;
 }
\ No newline at end of file