diff --git a/Inc/LinIO.h b/Inc/LinIO.h
index 8f2b0e0..24491f9 100644
--- a/Inc/LinIO.h
+++ b/Inc/LinIO.h
@@ -6,6 +6,21 @@
 #define MODULE_LINIO_H
 
 #include "stdint.h"
+#include "cmsis_os2.h"
+
+typedef enum {
+    LIN_DIRECTION_GET = 0,
+    LIN_DIRECTION_SET = 1
+} eDirection;
+
+typedef struct {
+    osMessageQueueId_t rxDataQueue;
+    eDirection direction;
+    uint8_t g_aTxBufferLen;
+    uint8_t g_aTxBuffer[8];
+    uint8_t g_aRxBufferLen;
+    uint8_t g_aRxBuffer[8];
+} tLinData;
 
 typedef uint8_t (* LinIOTransaction  )(void *env, uint8_t command, uint32_t timeout);