diff --git a/include/zh_avr_i2c.h b/include/zh_avr_i2c.h
index fa26375..b0bee04 100644
--- a/include/zh_avr_i2c.h
+++ b/include/zh_avr_i2c.h
@@ -1,3 +1,42 @@
+#pragma once
+
+#include "stdlib.h"
+#include "stdint.h"
+#include "string.h"
+#include "stdbool.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+	typedef enum
+	{
+		AVR_FAIL = -1,
+		AVR_OK,
+		AVR_ERR_NO_MEM,
+		AVR_ERR_INVALID_ARG,
+		AVR_ERR_INVALID_STATE,
+		AVR_ERR_INVALID_SIZE,
+		AVR_ERR_NOT_FOUND,
+		AVR_ERR_NOT_SUPPORTED,
+		AVR_ERR_TIMEOUT,
+		AVR_ERR_INVALID_RESPONSE,
+		AVR_ERR_INVALID_CRC,
+		AVR_ERR_INVALID_VERSION,
+		AVR_ERR_NOT_FINISHED,
+		AVR_ERR_NOT_ALLOWED
+	} avr_err_t;
+
+	avr_err_t zh_avr_i2c_master_init(void);
+	avr_err_t zh_avr_i2c_master_transmit(const uint8_t addr, uint8_t *data, uint8_t size, size_t delay);
+	avr_err_t zh_avr_i2c_master_receive(const uint8_t addr, uint8_t *data, uint8_t size, size_t delay);
+	avr_err_t zh_avr_i2c_master_transmit_receive(const uint8_t addr, uint8_t *write_data, uint8_t write_size, uint8_t *read_data, uint8_t read_size, size_t delay);
+
+#ifdef __cplusplus
+}
+#endif
+
 #ifndef IICULTIMATE_H
 #define IICULTIMATE_H
 
diff --git a/zh_avr_i2c.c b/zh_avr_i2c.c
index c10dc42..e191a05 100644
--- a/zh_avr_i2c.c
+++ b/zh_avr_i2c.c
@@ -1,5 +1,21 @@
 #include "zh_avr_i2c.h"
 
+avr_err_t zh_avr_i2c_master_init(void)
+{
+}
+
+avr_err_t zh_avr_i2c_master_transmit(const uint8_t addr, uint8_t *data, uint8_t size, size_t delay)
+{
+}
+
+avr_err_t zh_avr_i2c_master_receive(const uint8_t addr, uint8_t *data, uint8_t size, size_t delay)
+{
+}
+
+avr_err_t zh_avr_i2c_master_transmit_receive(const uint8_t addr, uint8_t *write_data, uint8_t write_size, uint8_t *read_data, uint8_t read_size, size_t delay)
+{
+}
+
 void DoNothing(void);
 
 uint8_t i2c_Do;							// Переменная состояния передатчика IIC