diff --git a/Src/main.c b/Src/main.c
index 213ea04..8ace522 100644
--- a/Src/main.c
+++ b/Src/main.c
@@ -469,6 +469,20 @@ static void MX_GPIO_Init(void)
 
 /* USER CODE BEGIN 4 */
 
+int __io_putchar(int ch){
+  uint8_t c[1];
+  c[0] = ch & 0x00FF;
+  HAL_UART_Transmit(&huart1, &*c, 1, 10);
+  return ch;
+}
+
+int _write(int file, char *ptr, int len){
+  int DataIdx;
+  for (DataIdx = 0; DataIdx < len; DataIdx++){
+    __io_putchar(*ptr++);
+  }
+  return len;
+}
 /* USER CODE END 4 */
 
 /**