diff --git a/cube/.mxproject b/cube/.mxproject
index 992b68f..b4106fe 100644
--- a/cube/.mxproject
+++ b/cube/.mxproject
@@ -1,5 +1,5 @@
 [PreviousLibFiles]
-LibFiles=Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_adc.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_adc_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_def.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_rcc.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_rcc_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_gpio.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_gpio_ex.h;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio_ex.c;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_dma_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_dma.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_cortex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_pwr.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_flash.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_flash_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_exti.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_spi.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_tim.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_tim_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_uart.h;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc_ex.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc_ex.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_dma.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_cortex.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_pwr.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash_ex.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_exti.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_spi.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim_ex.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_uart.c;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_adc.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_adc_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_def.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_rcc.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_rcc_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_gpio.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_gpio_ex.h;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio_ex.c;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_dma_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_dma.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_cortex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_pwr.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_flash.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_flash_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_exti.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_spi.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_tim.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_tim_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_uart.h;Drivers/CMSIS/Device/ST/STM32F1xx/Include/stm32f103xe.h;Drivers/CMSIS/Device/ST/STM32F1xx/Include/stm32f1xx.h;Drivers/CMSIS/Device/ST/STM32F1xx/Include/system_stm32f1xx.h;Drivers/CMSIS/Device/ST/STM32F1xx/Source/Templates/system_stm32f1xx.c;Drivers/CMSIS/Include/core_cm3.h;Drivers/CMSIS/Include/core_sc000.h;Drivers/CMSIS/Include/core_cm0plus.h;Drivers/CMSIS/Include/cmsis_gcc.h;Drivers/CMSIS/Include/core_cm7.h;Drivers/CMSIS/Include/core_armv8mbl.h;Drivers/CMSIS/Include/core_armv8mml.h;Drivers/CMSIS/Include/mpu_armv8.h;Drivers/CMSIS/Include/mpu_armv7.h;Drivers/CMSIS/Include/core_cm4.h;Drivers/CMSIS/Include/core_cm23.h;Drivers/CMSIS/Include/core_cm0.h;Drivers/CMSIS/Include/cmsis_armcc.h;Drivers/CMSIS/Include/cmsis_armclang.h;Drivers/CMSIS/Include/core_cm33.h;Drivers/CMSIS/Include/core_cm1.h;Drivers/CMSIS/Include/cmsis_iccarm.h;Drivers/CMSIS/Include/cmsis_compiler.h;Drivers/CMSIS/Include/cmsis_version.h;Drivers/CMSIS/Include/tz_context.h;Drivers/CMSIS/Include/core_sc300.h;
+LibFiles=Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_adc.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_adc_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_def.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_rcc.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_rcc_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_gpio.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_gpio_ex.h;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio_ex.c;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_dma_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_dma.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_cortex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_pwr.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_flash.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_flash_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_exti.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_spi.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_tim.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_tim_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_uart.h;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc_ex.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc_ex.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_dma.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_cortex.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_pwr.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash_ex.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_exti.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_spi.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim_ex.c;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_uart.c;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_adc.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_adc_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_def.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_rcc.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_rcc_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_gpio.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_gpio_ex.h;Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio_ex.c;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_dma_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_dma.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_cortex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_pwr.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_flash.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_flash_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_exti.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_spi.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_tim.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_tim_ex.h;Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_uart.h;Drivers/CMSIS/Device/ST/STM32F1xx/Include/stm32f103xe.h;Drivers/CMSIS/Device/ST/STM32F1xx/Include/stm32f1xx.h;Drivers/CMSIS/Device/ST/STM32F1xx/Include/system_stm32f1xx.h;Drivers/CMSIS/Device/ST/STM32F1xx/Source/Templates/system_stm32f1xx.c;Drivers/CMSIS/Include/cmsis_armclang.h;Drivers/CMSIS/Include/core_armv8mml.h;Drivers/CMSIS/Include/core_cm0plus.h;Drivers/CMSIS/Include/tz_context.h;Drivers/CMSIS/Include/core_cm0.h;Drivers/CMSIS/Include/cmsis_compiler.h;Drivers/CMSIS/Include/core_cm3.h;Drivers/CMSIS/Include/core_sc000.h;Drivers/CMSIS/Include/core_cm23.h;Drivers/CMSIS/Include/core_cm1.h;Drivers/CMSIS/Include/mpu_armv7.h;Drivers/CMSIS/Include/core_cm33.h;Drivers/CMSIS/Include/cmsis_gcc.h;Drivers/CMSIS/Include/core_armv8mbl.h;Drivers/CMSIS/Include/cmsis_armcc.h;Drivers/CMSIS/Include/core_sc300.h;Drivers/CMSIS/Include/cmsis_iccarm.h;Drivers/CMSIS/Include/core_cm4.h;Drivers/CMSIS/Include/mpu_armv8.h;Drivers/CMSIS/Include/cmsis_version.h;Drivers/CMSIS/Include/core_cm7.h;
 
 [PreviousUsedIarFiles]
 SourceFiles=../Core/Src/main.c;../Core/Src/gpio.c;../Core/Src/adc.c;../Core/Src/spi.c;../Core/Src/usart.c;../Core/Src/stm32f1xx_it.c;../Core/Src/stm32f1xx_hal_msp.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio_ex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc_ex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc_ex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_dma.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_cortex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_pwr.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash_ex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_exti.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_spi.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim_ex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_uart.c;../Core/Src/system_stm32f1xx.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio_ex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc_ex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc_ex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_dma.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_cortex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_pwr.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash_ex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_exti.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_spi.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim_ex.c;../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_uart.c;../Core/Src/system_stm32f1xx.c;../Drivers/CMSIS/Device/ST/STM32F1xx/Source/Templates/system_stm32f1xx.c;;
@@ -14,25 +14,25 @@ CDefines=USE_HAL_DRIVER;STM32F103xE;USE_HAL_DRIVER;USE_HAL_DRIVER;
 [PreviousGenFiles]
 AdvancedFolderStructure=true
 HeaderFileListSize=7
-HeaderFiles#0=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Inc/gpio.h
-HeaderFiles#1=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Inc/adc.h
-HeaderFiles#2=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Inc/spi.h
-HeaderFiles#3=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Inc/usart.h
-HeaderFiles#4=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Inc/stm32f1xx_it.h
-HeaderFiles#5=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Inc/stm32f1xx_hal_conf.h
-HeaderFiles#6=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Inc/main.h
+HeaderFiles#0=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Inc/gpio.h
+HeaderFiles#1=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Inc/adc.h
+HeaderFiles#2=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Inc/spi.h
+HeaderFiles#3=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Inc/usart.h
+HeaderFiles#4=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Inc/stm32f1xx_it.h
+HeaderFiles#5=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Inc/stm32f1xx_hal_conf.h
+HeaderFiles#6=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Inc/main.h
 HeaderFolderListSize=1
-HeaderPath#0=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Inc
+HeaderPath#0=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Inc
 HeaderFiles=;
 SourceFileListSize=7
-SourceFiles#0=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Src/gpio.c
-SourceFiles#1=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Src/adc.c
-SourceFiles#2=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Src/spi.c
-SourceFiles#3=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Src/usart.c
-SourceFiles#4=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Src/stm32f1xx_it.c
-SourceFiles#5=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Src/stm32f1xx_hal_msp.c
-SourceFiles#6=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Src/main.c
+SourceFiles#0=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Src/gpio.c
+SourceFiles#1=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Src/adc.c
+SourceFiles#2=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Src/spi.c
+SourceFiles#3=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Src/usart.c
+SourceFiles#4=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Src/stm32f1xx_it.c
+SourceFiles#5=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Src/stm32f1xx_hal_msp.c
+SourceFiles#6=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Src/main.c
 SourceFolderListSize=1
-SourcePath#0=/home/wn/Workspaces/MBusGateway3Variant/cube/Core/Src
+SourcePath#0=/home/wn/Workspaces/mbusgateway3variant/cube/Core/Src
 SourceFiles=;
 
diff --git a/cube/Core/Inc/main.h b/cube/Core/Inc/main.h
index fe1f8a7..5b294f9 100644
--- a/cube/Core/Inc/main.h
+++ b/cube/Core/Inc/main.h
@@ -66,6 +66,7 @@ void Error_Handler(void);
 #define Loop_Disable_GPIO_Port GPIOE
 #define Loop_Status_Pin GPIO_PIN_4
 #define Loop_Status_GPIO_Port GPIOE
+#define Loop_Status_EXTI_IRQn EXTI4_IRQn
 #define LED_Green_Pin GPIO_PIN_5
 #define LED_Green_GPIO_Port GPIOE
 #define LED_Red_Pin GPIO_PIN_6
diff --git a/cube/Core/Inc/stm32f1xx_it.h b/cube/Core/Inc/stm32f1xx_it.h
index 06d7950..79f8abe 100644
--- a/cube/Core/Inc/stm32f1xx_it.h
+++ b/cube/Core/Inc/stm32f1xx_it.h
@@ -56,6 +56,7 @@ void SVC_Handler(void);
 void DebugMon_Handler(void);
 void PendSV_Handler(void);
 void SysTick_Handler(void);
+void EXTI4_IRQHandler(void);
 void UART4_IRQHandler(void);
 void UART5_IRQHandler(void);
 /* USER CODE BEGIN EFP */
diff --git a/cube/Core/Src/gpio.c b/cube/Core/Src/gpio.c
index cd1e05c..95cbec2 100644
--- a/cube/Core/Src/gpio.c
+++ b/cube/Core/Src/gpio.c
@@ -64,8 +64,8 @@ void MX_GPIO_Init(void)
 
   /*Configure GPIO pin : PtPin */
   GPIO_InitStruct.Pin = Loop_Status_Pin;
-  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
+  GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING_FALLING;
+  GPIO_InitStruct.Pull = GPIO_PULLUP;
   HAL_GPIO_Init(Loop_Status_GPIO_Port, &GPIO_InitStruct);
 
   /*Configure GPIO pin : PtPin */
@@ -75,6 +75,10 @@ void MX_GPIO_Init(void)
   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
   HAL_GPIO_Init(Frontend_Out_GPIO_Port, &GPIO_InitStruct);
 
+  /* EXTI interrupt init*/
+  HAL_NVIC_SetPriority(EXTI4_IRQn, 0, 0);
+  HAL_NVIC_EnableIRQ(EXTI4_IRQn);
+
 }
 
 /* USER CODE BEGIN 2 */
diff --git a/cube/Core/Src/stm32f1xx_it.c b/cube/Core/Src/stm32f1xx_it.c
index 236145c..d0946c5 100644
--- a/cube/Core/Src/stm32f1xx_it.c
+++ b/cube/Core/Src/stm32f1xx_it.c
@@ -203,6 +203,20 @@ void SysTick_Handler(void)
 /* please refer to the startup file (startup_stm32f1xx.s).                    */
 /******************************************************************************/
 
+/**
+  * @brief This function handles EXTI line4 interrupt.
+  */
+void EXTI4_IRQHandler(void)
+{
+  /* USER CODE BEGIN EXTI4_IRQn 0 */
+
+  /* USER CODE END EXTI4_IRQn 0 */
+  HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_4);
+  /* USER CODE BEGIN EXTI4_IRQn 1 */
+
+  /* USER CODE END EXTI4_IRQn 1 */
+}
+
 /**
   * @brief This function handles UART4 global interrupt.
   */
diff --git a/cube/Core/Src/stm32f1xx_it.c-bak b/cube/Core/Src/stm32f1xx_it.c-bak
index fa722bb..8443dc1 100644
--- a/cube/Core/Src/stm32f1xx_it.c-bak
+++ b/cube/Core/Src/stm32f1xx_it.c-bak
@@ -198,6 +198,20 @@ void SysTick_Handler(void)
 /* please refer to the startup file (startup_stm32f1xx.s).                    */
 /******************************************************************************/
 
+/**
+  * @brief This function handles EXTI line4 interrupt.
+  */
+void EXTI4_IRQHandler(void)
+{
+  /* USER CODE BEGIN EXTI4_IRQn 0 */
+
+  /* USER CODE END EXTI4_IRQn 0 */
+  HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_4);
+  /* USER CODE BEGIN EXTI4_IRQn 1 */
+
+  /* USER CODE END EXTI4_IRQn 1 */
+}
+
 /**
   * @brief This function handles UART4 global interrupt.
   */
diff --git a/cube/Makefile b/cube/Makefile
index 0f37ccb..f0d93c9 100644
--- a/cube/Makefile
+++ b/cube/Makefile
@@ -1,6 +1,6 @@
-# Processed by ../tools/insertMyCode.sh
+# Processed by ../tools/insertMyCode.sh
 ##########################################################################################################################
-# File automatically-generated by tool: [projectgenerator] version: [3.10.0-B14] date: [Sun Oct 18 22:15:54 CEST 2020]
+# File automatically-generated by tool: [projectgenerator] version: [3.10.0-B14] date: [Tue Oct 27 22:02:19 CET 2020]
 ##########################################################################################################################
 
 # ------------------------------------------------
@@ -36,36 +36,36 @@ BUILD_DIR = build
 # source
 ######################################
 # C sources
-C_SOURCES =  \
-User/Src/main2.c User/Src/led.c User/Src/loopCtrl.c hottislib/PontCoopScheduler.c  \
-Core/Src/main.c \
-Core/Src/gpio.c \
-Core/Src/adc.c \
-Core/Src/spi.c \
-Core/Src/usart.c \
-Core/Src/stm32f1xx_it.c \
-Core/Src/stm32f1xx_hal_msp.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio_ex.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc_ex.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc_ex.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_dma.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_cortex.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_pwr.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash_ex.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_exti.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_spi.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim_ex.c \
-Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_uart.c \
+C_SOURCES =  \
+User/Src/led.c User/Src/loopCtrl.c User/Src/main2.c hottislib/PontCoopScheduler.c  \
+Core/Src/main.c \
+Core/Src/gpio.c \
+Core/Src/adc.c \
+Core/Src/spi.c \
+Core/Src/usart.c \
+Core/Src/stm32f1xx_it.c \
+Core/Src/stm32f1xx_hal_msp.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio_ex.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_adc_ex.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc_ex.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_dma.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_cortex.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_pwr.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash_ex.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_exti.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_spi.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim_ex.c \
+Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_uart.c \
 Core/Src/system_stm32f1xx.c  
 
 # ASM sources
-ASM_SOURCES =  \
+ASM_SOURCES =  \
 startup_stm32f103xe.s
 
 
@@ -109,8 +109,8 @@ MCU = $(CPU) -mthumb $(FPU) $(FLOAT-ABI)
 AS_DEFS = 
 
 # C defines
-C_DEFS =  \
--DUSE_HAL_DRIVER \
+C_DEFS =  \
+-DUSE_HAL_DRIVER \
 -DSTM32F103xE
 
 
@@ -118,14 +118,14 @@ C_DEFS =  \
 AS_INCLUDES = 
 
 # C includes
-C_INCLUDES =  \
--Ihottislib \
--IUser/Inc \
--ICore/Inc \
--IDrivers/STM32F1xx_HAL_Driver/Inc \
--IDrivers/STM32F1xx_HAL_Driver/Inc/Legacy \
--IDrivers/CMSIS/Device/ST/STM32F1xx/Include \
--IDrivers/CMSIS/Include \
+C_INCLUDES =  \
+-Ihottislib \
+-IUser/Inc \
+-ICore/Inc \
+-IDrivers/STM32F1xx_HAL_Driver/Inc \
+-IDrivers/STM32F1xx_HAL_Driver/Inc/Legacy \
+-IDrivers/CMSIS/Device/ST/STM32F1xx/Include \
+-IDrivers/CMSIS/Include \
 -IDrivers/CMSIS/Include
 
 
diff --git a/cube/Makefile-bak b/cube/Makefile-bak
index 52a5144..f5b447f 100644
--- a/cube/Makefile-bak
+++ b/cube/Makefile-bak
@@ -1,5 +1,5 @@
 ##########################################################################################################################
-# File automatically-generated by tool: [projectgenerator] version: [3.10.0-B14] date: [Sun Oct 18 22:15:54 CEST 2020]
+# File automatically-generated by tool: [projectgenerator] version: [3.10.0-B14] date: [Tue Oct 27 22:02:19 CET 2020]
 ##########################################################################################################################
 
 # ------------------------------------------------
diff --git a/cube/cube.ioc b/cube/cube.ioc
index bf48760..86867dd 100644
--- a/cube/cube.ioc
+++ b/cube/cube.ioc
@@ -6,7 +6,7 @@ ADC1.Rank-0\#ChannelRegularConversion=1
 ADC1.SamplingTime-0\#ChannelRegularConversion=ADC_SAMPLETIME_1CYCLE_5
 ADC1.master=1
 File.Version=6
-GPIO.groupedBy=
+GPIO.groupedBy=Group By Peripherals
 KeepUserPlacement=false
 Mcu.Family=STM32F1
 Mcu.IP0=ADC1
@@ -50,6 +50,7 @@ MxCube.Version=6.0.0
 MxDb.Version=DB.6.0.0
 NVIC.BusFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false
 NVIC.DebugMonitor_IRQn=true\:0\:0\:false\:false\:true\:false\:false
+NVIC.EXTI4_IRQn=true\:0\:0\:false\:false\:true\:true\:true
 NVIC.ForceEnableDMAVector=true
 NVIC.HardFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false
 NVIC.MemoryManagement_IRQn=true\:0\:0\:false\:false\:true\:false\:false
@@ -112,10 +113,12 @@ PE3.GPIOParameters=GPIO_Label
 PE3.GPIO_Label=Loop_Disable
 PE3.Locked=true
 PE3.Signal=GPIO_Output
-PE4.GPIOParameters=GPIO_Label
+PE4.GPIOParameters=GPIO_PuPd,GPIO_Label,GPIO_ModeDefaultEXTI
 PE4.GPIO_Label=Loop_Status
+PE4.GPIO_ModeDefaultEXTI=GPIO_MODE_IT_RISING_FALLING
+PE4.GPIO_PuPd=GPIO_PULLUP
 PE4.Locked=true
-PE4.Signal=GPIO_Input
+PE4.Signal=GPXTI4
 PE5.GPIOParameters=GPIO_Label
 PE5.GPIO_Label=LED_Green
 PE5.Locked=true
@@ -139,7 +142,7 @@ ProjectManager.FreePins=false
 ProjectManager.HalAssertFull=false
 ProjectManager.HeapSize=0x200
 ProjectManager.KeepUserCode=false
-ProjectManager.LastFirmware=true
+ProjectManager.LastFirmware=false
 ProjectManager.LibraryCopy=1
 ProjectManager.MainLocation=Core/Src
 ProjectManager.NoMain=false
@@ -182,6 +185,8 @@ RCC.USBFreq_Value=72000000
 RCC.VCOOutput2Freq_Value=8000000
 SH.ADCx_IN1.0=ADC1_IN1,IN1
 SH.ADCx_IN1.ConfNb=1
+SH.GPXTI4.0=GPIO_EXTI4
+SH.GPXTI4.ConfNb=1
 SPI2.CalculateBaudRate=18.0 MBits/s
 SPI2.Direction=SPI_DIRECTION_2LINES
 SPI2.IPParameters=VirtualType,Mode,Direction,CalculateBaudRate
diff --git a/tools/removeGeneratedCode.sh b/tools/removeGeneratedCode.sh
index ae0e596..e87a462 100755
--- a/tools/removeGeneratedCode.sh
+++ b/tools/removeGeneratedCode.sh
@@ -1,3 +1,3 @@
 #!/bin/bash
 
-rm -rf build/ Core/ Drivers/ Makefile Makefile-bak  startup_stm32f103xb.s  STM32F103C8Tx_FLASH.ld
\ No newline at end of file
+rm -rf build/ Core/ Drivers/ Makefile Makefile-bak  startup_stm32f103xe.s  STM32F103VCTx_FLASH.ld