diff --git a/Core/Src/Components/Start.cpp b/Core/Src/Components/Start.cpp
index 6d90752..d598fc3 100644
--- a/Core/Src/Components/Start.cpp
+++ b/Core/Src/Components/Start.cpp
@@ -43,9 +43,11 @@ void HAL_I2C_AddrCallback(I2C_HandleTypeDef *hi2c, uint8_t transferDirection, ui
         HAL_I2C_Slave_Seq_Receive_DMA(hi2c, receivingBuffer + receivingBufferDataSize, 1, I2C_NEXT_FRAME);
 	}else{
         slaveMode = Transmitting;
-        transmittingBuffer[0] = 0x55;
-        transmittingBufferDataSize = 1;
-        HAL_I2C_Slave_Seq_Transmit_DMA(hi2c, transmittingBuffer, transmittingBufferDataSize, I2C_LAST_FRAME);
+        if(transmittingBufferDataSize){
+            HAL_I2C_Slave_Seq_Transmit_DMA(hi2c, transmittingBuffer, transmittingBufferDataSize, I2C_LAST_FRAME);
+        }else{
+
+        }
 	}
 }
 
@@ -68,7 +70,7 @@ void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef *hi2c) {
 }
 
 void HAL_I2C_SlaveTxCpltCallback(I2C_HandleTypeDef *hi2c) {
-    transmittingBufferDataSize = 0;
+    //transmittingBufferDataSize = 0;
 }
 
 void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c) {
@@ -76,9 +78,15 @@ void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c) {
 }
 
 void Start(){
+	uint8_t byte[4] = {33, 34, 35, 36};
 	HAL_I2C_EnableListen_IT(&hi2c3);
 	while(1){
 		HAL_GPIO_TogglePin(LD3_GPIO_Port, LD3_Pin);
-		HAL_Delay(10000);
+		transmit(byte, 3);
+		byte[0]++;
+		byte[1]++;
+		byte[2]++;
+		byte[3]++;
+		HAL_Delay(500);
 	}
 }
diff --git a/Core/Src/main.c b/Core/Src/main.c
index ad5a440..4e0aac0 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -246,7 +246,7 @@ static void MX_I2C3_Init(void)
   hi2c3.Instance = I2C3;
   hi2c3.Init.ClockSpeed = 100000;
   hi2c3.Init.DutyCycle = I2C_DUTYCYCLE_2;
-  hi2c3.Init.OwnAddress1 = 126;
+  hi2c3.Init.OwnAddress1 = 32;
   hi2c3.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
   hi2c3.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
   hi2c3.Init.OwnAddress2 = 0;
diff --git a/Core/Src/syscalls.c b/Core/Src/syscalls.c
index fadb992..03ee68d 100644
--- a/Core/Src/syscalls.c
+++ b/Core/Src/syscalls.c
@@ -29,7 +29,7 @@
 #include <time.h>
 #include <sys/time.h>
 #include <sys/times.h>
-
+#include "main.h"
 
 /* Variables */
 extern int __io_putchar(int ch) __attribute__((weak));
@@ -80,7 +80,7 @@ __attribute__((weak)) int _write(int file, char *ptr, int len)
 
 	for (DataIdx = 0; DataIdx < len; DataIdx++)
 	{
-		__io_putchar(*ptr++);
+		ITM_SendChar(*ptr++);
 	}
 	return len;
 }
diff --git a/F411-i2c-peripheral.ioc b/F411-i2c-peripheral.ioc
index 65ff7c5..c84799e 100644
--- a/F411-i2c-peripheral.ioc
+++ b/F411-i2c-peripheral.ioc
@@ -1,4 +1,7 @@
 #MicroXplorer Configuration settings - do not modify
+CAD.formats=
+CAD.pinconfig=
+CAD.provider=
 Dma.I2C3_RX.0.Direction=DMA_PERIPH_TO_MEMORY
 Dma.I2C3_RX.0.FIFOMode=DMA_FIFOMODE_DISABLE
 Dma.I2C3_RX.0.Instance=DMA1_Stream1
@@ -24,7 +27,7 @@ Dma.Request1=I2C3_TX
 Dma.RequestsNb=2
 File.Version=6
 I2C3.IPParameters=OwnAddress
-I2C3.OwnAddress=0x3F
+I2C3.OwnAddress=0x10
 I2S2.AudioFreq=I2S_AUDIOFREQ_96K
 I2S2.ErrorAudioFreq=0.15 %
 I2S2.FullDuplexMode=I2S_FULLDUPLEXMODE_ENABLE
@@ -347,10 +350,13 @@ ProjectManager.PreviousToolchain=
 ProjectManager.ProjectBuild=false
 ProjectManager.ProjectFileName=F411-i2c-peripheral.ioc
 ProjectManager.ProjectName=F411-i2c-peripheral
+ProjectManager.ProjectStructure=
 ProjectManager.RegisterCallBack=
 ProjectManager.StackSize=0x400
 ProjectManager.TargetToolchain=STM32CubeIDE
 ProjectManager.ToolChainLocation=
+ProjectManager.UAScriptAfterPath=
+ProjectManager.UAScriptBeforePath=
 ProjectManager.UnderRoot=true
 ProjectManager.functionlistsort=1-SystemClock_Config-RCC-false-HAL-false,2-MX_GPIO_Init-GPIO-false-HAL-true,3-MX_DMA_Init-DMA-false-HAL-true,4-MX_I2C1_Init-I2C1-false-HAL-true,5-MX_I2S2_Init-I2S2-false-HAL-true,6-MX_I2S3_Init-I2S3-false-HAL-true,7-MX_SPI1_Init-SPI1-false-HAL-true,8-MX_USB_HOST_Init-USB_HOST-false-HAL-false,9-MX_I2C3_Init-I2C3-false-HAL-true
 RCC.48MHZClocksFreq_Value=48000000
diff --git a/STM32F411VETX_FLASH.ld b/STM32F411VETX_FLASH.ld
index 919c450..c991fb8 100644
--- a/STM32F411VETX_FLASH.ld
+++ b/STM32F411VETX_FLASH.ld
@@ -38,8 +38,8 @@ ENTRY(Reset_Handler)
 /* Highest address of the user mode stack */
 _estack = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */
 
-_Min_Heap_Size = 0x200 ; /* required amount of heap */
-_Min_Stack_Size = 0x400 ; /* required amount of stack */
+_Min_Heap_Size = 0x200; /* required amount of heap */
+_Min_Stack_Size = 0x400; /* required amount of stack */
 
 /* Memories definition */
 MEMORY