diff --git a/firmware/applications/Makefile b/firmware/applications/Makefile
index 8a3baf2..86a45db 100644
--- a/firmware/applications/Makefile
+++ b/firmware/applications/Makefile
@@ -67,7 +67,10 @@ OBJS += $(LOBJ)
 endif
 
 ifeq "$(APP)" "tester"
-TSRCS = $(wildcard $(APP)/*.c)
+ifndef TYPE
+TYPE=$(APP)
+endif
+TSRCS = $(wildcard $(TYPE)/*.c)
 TOBJS = $(foreach mod,$(TSRCS),$(subst .c,.o,$(mod)))
 
 TWRAP=tester.gen
@@ -90,7 +93,7 @@ $(LIBFILE): $(OBJS) $(WRAPOBJ)
 	$(CC) $(CFLAGS) -o $@ $<
 
 clean:
-	rm -f $(OBJS) $(WRAPOBJ) $(WRAPSRC) $(LIBFILE) *.o tester/*.o
+	rm -f $(OBJS) $(WRAPOBJ) $(WRAPSRC) $(LIBFILE) *.o */*.o
 
 %.c:
 	@echo 
diff --git a/firmware/applications/serial/config.c b/firmware/applications/serial/config.c
new file mode 120000
index 0000000..0dc83e2
--- /dev/null
+++ b/firmware/applications/serial/config.c
@@ -0,0 +1 @@
+../tester/config.c
\ No newline at end of file
diff --git a/firmware/applications/serial/serial.c b/firmware/applications/serial/serial.c
new file mode 100644
index 0000000..d8e1788
--- /dev/null
+++ b/firmware/applications/serial/serial.c
@@ -0,0 +1,116 @@
+#include <sysinit.h>
+
+#include "basic/basic.h"
+
+#include "lcd/lcd.h"
+#include "lcd/print.h"
+
+#include "funk/nrf24l01p.h"
+
+#include "core/usbcdc/usb.h"
+#include "core/usbcdc/usbcore.h"
+#include "core/usbcdc/usbhw.h"
+#include "core/usbcdc/cdcuser.h"
+#include "core/usbcdc/cdc_buf.h"
+
+#include <string.h>
+
+#if CFG_USBMSC
+#error "MSC is defined
+#endif
+
+#if !CFG_USBCDC
+#error "CDC is not defined
+#endif
+
+/**************************************************************************/
+
+volatile unsigned int lastTick;
+int puts(const char * str)
+{
+  // There must be at least 1ms between USB frames (of up to 64 bytes)
+  // This buffers all data and writes it out from the buffer one frame
+  // and one millisecond at a time
+    if (USB_Configuration) 
+    {
+      while(*str)
+        cdcBufferWrite(*str++);
+      // Check if we can flush the buffer now or if we need to wait
+      unsigned int currentTick = systickGetTicks();
+      if (currentTick != lastTick)
+      {
+        uint8_t frame[64];
+        uint32_t bytesRead = 0;
+        while (cdcBufferDataPending())
+        {
+          // Read up to 64 bytes as long as possible
+          bytesRead = cdcBufferReadLen(frame, 64);
+          USB_WriteEP (CDC_DEP_IN, frame, bytesRead);
+          systickDelay(1);
+        }
+        lastTick = currentTick;
+      }
+    }
+  return 0;
+}
+
+
+void f_ser(void) {
+    //lastTick = systickGetTicks();   // Used to control output/printf timing
+    CDC_Init();                     // Initialise VCOM
+    USB_Init();                     // USB Initialization
+    lcdPrintln("preconnect");
+    USB_Connect(TRUE);              // USB Connect
+    lcdPrintln("postconnect");
+    // Wait until USB is configured or timeout occurs
+    uint32_t usbTimeout = 0; 
+//    while ( usbTimeout < CFG_USBCDC_INITTIMEOUT / 10 ) {
+//      if (USB_Configuration) break;
+//      delayms(10);             // Wait 10ms
+//      usbTimeout++;
+//    }
+    lcdPrintln("fini");
+};
+
+void f_disconnect(void) {
+    USB_Connect(FALSE);
+};
+
+#define LEN 10
+void f_sread(){
+    uint8_t buf[LEN+1];
+    int l=LEN;
+
+    lcdPrint("Bytes:");
+    CDC_OutBufAvailChar (&l);
+    lcdPrintInt(l);
+    lcdNl();
+
+    lcdPrint("read:");
+    CDC_RdOutBuf (buf, &l);
+    lcdPrintInt(l);
+    lcdNl();
+
+    buf[l]=0;
+    lcdPrintln(buf);
+};
+
+void f_echo(){
+    uint8_t buf[2] = {0,0};
+    int l;
+    while(1){
+        CDC_OutBufAvailChar(&l);
+        if( l ){
+            l = 1;
+            CDC_RdOutBuf (buf, &l);
+            puts(buf);
+        }
+        //puts("hello world\r\n");
+        //delayms(1);
+    }
+};
+
+void f_say(){
+        puts("hello world\r\n");
+};
+
diff --git a/firmware/applications/serial/util.c b/firmware/applications/serial/util.c
new file mode 120000
index 0000000..2a06902
--- /dev/null
+++ b/firmware/applications/serial/util.c
@@ -0,0 +1 @@
+../tester/util.c
\ No newline at end of file
diff --git a/firmware/applications/serial/uuid.c b/firmware/applications/serial/uuid.c
new file mode 120000
index 0000000..a3edae7
--- /dev/null
+++ b/firmware/applications/serial/uuid.c
@@ -0,0 +1 @@
+../tester/uuid.c
\ No newline at end of file
diff --git a/firmware/basic/reinvoke_isp.c b/firmware/basic/reinvoke_isp.c
index 2b3a6f3..b34ddc1 100644
--- a/firmware/basic/reinvoke_isp.c
+++ b/firmware/basic/reinvoke_isp.c
@@ -76,10 +76,16 @@ void EnableWatchdog(uint32_t ms){
 
 void ISPandReset(void){
 #if CFG_USBMSC
-    if(usbMSCenabled){
+    if(usbMSCenabled&USB_MSC_ENABLEFLAG){
         usbMSCOff();
         delayms(500);
     };
+#endif
+#if CFG_USBCDC
+    if(usbMSCenabled&USB_CDC_ENABLEFLAG){
+        USB_Connect(FALSE);
+        delayms(500);
+    };
 #endif
     EnableWatchdog(1000*5);
     ReinvokeISP();
diff --git a/firmware/usb/usbmsc.c b/firmware/usb/usbmsc.c
index e75d310..25f4b70 100644
--- a/firmware/usb/usbmsc.c
+++ b/firmware/usb/usbmsc.c
@@ -85,7 +85,7 @@ void usbMSCInit(void) {
 
   (*rom)->pUSBD->init(&DeviceInfo); /* USB Initialization */
   (*rom)->pUSBD->connect(true);     /* USB Connect */
-  usbMSCenabled=1;
+  usbMSCenabled|=USB_MSC_ENABLEFLAG;
 }
 
 #if CFG_USBMSC
@@ -96,6 +96,6 @@ void USB_IRQHandler() {
 
 void usbMSCOff(void) {
   (*rom)->pUSBD->connect(false);     /* USB Disconnect */
-  usbMSCenabled=0;
+  usbMSCenabled&=~USB_MSC_ENABLEFLAG;
 }
 
diff --git a/firmware/usb/usbmsc.h b/firmware/usb/usbmsc.h
index defe55b..5d01583 100644
--- a/firmware/usb/usbmsc.h
+++ b/firmware/usb/usbmsc.h
@@ -39,6 +39,8 @@
 
 #include "projectconfig.h"
 
+#define USB_MSC_ENABLEFLAG (1<<0)
+#define USB_CDC_ENABLEFLAG (1<<1)
 extern char usbMSCenabled;
 void usbMSCWrite(uint32_t offset, uint8_t src[], uint32_t length);
 void usbMSCRead(uint32_t offset, uint8_t dst[], uint32_t length);
diff --git a/firmware/usbcdc/usbhw.c b/firmware/usbcdc/usbhw.c
index d148ed2..711190c 100644
--- a/firmware/usbcdc/usbhw.c
+++ b/firmware/usbcdc/usbhw.c
@@ -27,6 +27,7 @@
 #include "usbcore.h"
 #include "usbuser.h"
 
+#include "usb/usbmsc.h"
 
 /*    
  *    USB and IO Clock configuration only. 
@@ -63,8 +64,8 @@ void USBIOClkConfig( void )
   SCB_USBCLKSEL = SCB_USBCLKSEL_SOURCE_USBPLLOUT;
 
   // Set USB pin functions
-  IOCON_PIO0_1 &= ~IOCON_PIO0_1_FUNC_MASK;
-  IOCON_PIO0_1 |= IOCON_PIO0_1_FUNC_CLKOUT;           // CLK OUT
+//  IOCON_PIO0_1 &= ~IOCON_PIO0_1_FUNC_MASK;
+//  IOCON_PIO0_1 |= IOCON_PIO0_1_FUNC_CLKOUT;           // CLK OUT
   IOCON_PIO0_3 &= ~IOCON_PIO0_3_FUNC_MASK;
   IOCON_PIO0_3 |= IOCON_PIO0_3_FUNC_USB_VBUS;         // VBus
   IOCON_PIO0_6 &= ~IOCON_PIO0_6_FUNC_MASK;
@@ -205,6 +206,10 @@ void USB_Init (void)
 
 void USB_Connect (uint32_t con) 
 {
+    if(con)
+        usbMSCenabled|=USB_CDC_ENABLEFLAG;
+    else
+        usbMSCenabled&=~USB_CDC_ENABLEFLAG;
   WrCmdDat(CMD_SET_DEV_STAT, DAT_WR_BYTE(con ? DEV_CON : 0));
 }