diff --git a/include/sta/devices/stm32/mcu/STM32F407xx.hpp b/include/sta/devices/stm32/mcu/STM32F407xx.hpp
index 3e0815c..489efa7 100644
--- a/include/sta/devices/stm32/mcu/STM32F407xx.hpp
+++ b/include/sta/devices/stm32/mcu/STM32F407xx.hpp
@@ -7,6 +7,15 @@
 
 #include <sta/devices/stm32/mcu/common.hpp>
 
+// uart setup
+#ifdef STA_STM32_ASEAG
+#    define STA_STM32_USART_HANDLE huart1
+#else
+#    ifdef STA_STM32_SWD_USART_IDX
+#        define STA_STM32_USART_HANDLE CONCAT(huart, STA_STM32_SWD_USART_IDX)
+#    endif // STA_STM32_SWD_USART_IDX
+#endif // STA_STM32_SWD_USART_IDX
+
 // Peripheral clock mappings
 //