diff --git a/V203/ch32v203/gpio.h b/V203/ch32v203/gpio.h
index c34955e..b26d00e 100644
--- a/V203/ch32v203/gpio.h
+++ b/V203/ch32v203/gpio.h
@@ -24,7 +24,7 @@ class GpioClass {
   GPIOA_Type   & port;
   const uint32_t pin;
   public:
-    explicit constexpr GpioClass (GPIOA_Type & _port, const uint32_t _pin, const uint32_t _mode = GPIO_AI_PPO | GPIO_Speed_10MHz) noexcept
+    explicit GpioClass (GPIOA_Type & _port, const uint32_t _pin, const uint32_t _mode = GPIO_AI_PPO | GPIO_Speed_10MHz) noexcept
     : port(_port), pin(_pin) {
       /* Zapneme vše, ono je to dost jedno. */
       RCC.APB2PCENR.modify([](RCC_Type::APB2PCENR_DEF & r)->auto {
diff --git a/V203/usb/ch32v203/cdc_class.cpp b/V203/usb/ch32v203/cdc_class.cpp
index 15bd127..013412c 100644
--- a/V203/usb/ch32v203/cdc_class.cpp
+++ b/V203/usb/ch32v203/cdc_class.cpp
@@ -1,6 +1,6 @@
 #include "cdc_class.h"
 #include "system.h"
-#include "project_config.h"
+// #include "project_config.h"
 typedef __SIZE_TYPE__ size_t;
 /* Only one instance of this class ! */
 static cdc_class * pInstance = nullptr;
@@ -98,11 +98,11 @@ void cdc_class::USBFS_Device_Init( bool sta ) {
         USBFSD->BASE_CTRL = 0x00;
         NVIC.DisableIRQ( USBFS_IRQn );
     }
-    dtr << LED_OFF;
+    // dtr << LED_OFF;
 }
 
 cdc_class::cdc_class() noexcept : BaseLayer(),
-  CtrlIface(nullptr), dtr (DTR_LED), TxRing(), Ready(false), LineCoding() {
+  CtrlIface(nullptr), /*dtr (DTR_LED),*/ TxRing(), Ready(false), LineCoding() {
   pInstance = this;
   USBFS_DevConfig = 0;
   USBFS_DevAddr = 0;
@@ -247,8 +247,10 @@ union DtrRts {
                   if (CtrlIface) CtrlIface->IOCtrl(USB_USART_SET_DTR_RTS, tmp.bytes, 2);
                   const bool b = USBFS_SetupReqValue & 1;
                   Ready = b;
+                  /*
                   if (b) dtr << LED_ON;
                   else   dtr << LED_OFF;
+                  */
                 } break;
 
               case CDC_SEND_BREAK:
diff --git a/V203/usb/ch32v203/cdc_class.h b/V203/usb/ch32v203/cdc_class.h
index 7dae761..80499ab 100644
--- a/V203/usb/ch32v203/cdc_class.h
+++ b/V203/usb/ch32v203/cdc_class.h
@@ -37,7 +37,7 @@ static_assert (DEF_UEP_NUM == 8, "Number endpoints fail");
  */
 class cdc_class : public BaseLayer {
   CDC_CtrlInterface * CtrlIface;
-  GpioClass           dtr;
+  // GpioClass        dtr;
   FIFO<char, 128>     TxRing;
   volatile bool       Ready;
   USB_CDC_LineCoding  LineCoding;
diff --git a/V203/usb/ch32v203/gpio.h b/V203/usb/ch32v203/gpio.h
index cd669df..610c8a0 100644
--- a/V203/usb/ch32v203/gpio.h
+++ b/V203/usb/ch32v203/gpio.h
@@ -24,7 +24,7 @@ class GpioClass {
   GPIOA_Type   & port;
   const uint32_t pin;
   public:
-    explicit constexpr GpioClass (GPIOA_Type & _port, const uint32_t _pin, const uint32_t _mode = GPIO_AI_PPO | GPIO_Speed_10MHz) noexcept
+    explicit GpioClass (GPIOA_Type & _port, const uint32_t _pin, const uint32_t _mode = GPIO_AI_PPO | GPIO_Speed_10MHz) noexcept
     : port(_port), pin(_pin) {
       /* Zapneme vše, ono je to dost jedno. */
       RCC.APB2PCENR.modify([](RCC_Type::APB2PCENR_DEF & r)->auto {
diff --git a/V203/usb/usart/project_config.h b/V203/usb/usart/project_config.h
deleted file mode 100644
index 9bdeb8e..0000000
--- a/V203/usb/usart/project_config.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef _PROJECT_CONFIG_H_
-#define _PROJECT_CONFIG_H_
-#define DEVEL_KIT
-#ifdef DEVEL_KIT
-#define DTR_LED GPIOA,0
-#define DRQ_LED GPIOA,1
-#define LED_ON false
-#define LED_OFF true
-#else
-#define DTR_LED GPIOB,5
-#define DRQ_LED GPIOB,4
-#define LED_ON true
-#define LED_OFF false
-#endif
-#endif // _PROJECT_CONFIG_H_