diff --git a/README b/README
index 496ae79..3acd165 100644
--- a/README
+++ b/README
@@ -14,4 +14,4 @@ Software
 --------
 - required packages:
   * python-qt4-devel
-  * python-serial
+  * python-usb (>= 1.0)
diff --git a/software/device.py b/software/device.py
index aa662a5..09d5528 100644
--- a/software/device.py
+++ b/software/device.py
@@ -1,156 +1,30 @@
-import serial
+import usb
 
 class Device:
 
+    VENDORID  = 0x1fc9
+    PRODUCTID = 0x0003
+    INSIZE    = 64
+    OUTSIZE   = 2
+
     def __init__(self):
-        self.sctrl = serial.Serial()
-        self.sdata = serial.Serial()
+        usbdev = usb.core.find(idVendor = self.VENDORID, idProduct = self.PRODUCTID)
+        if usbdev == None:
+            raise Exception('EduBRM device not found')
+        usbdev.set_configuration()
+        self.epo = usb.util.find_descriptor(usbdev.get_interface_altsetting(),
+                       custom_match = lambda e: \
+                           usb.util.endpoint_direction(e.bEndpointAddress) == usb.util.ENDPOINT_OUT)
+        self.epi = usb.util.find_descriptor(usbdev.get_interface_altsetting(),
+                       custom_match = lambda e: \
+                           usb.util.endpoint_direction(e.bEndpointAddress) == usb.util.ENDPOINT_IN)
 
-    def open(self, ttyctrl, ttydata):
-        self.sctrl.port = ttyctrl
-        self.sdata.port = ttydata
-        self.sctrl.baudrate = 115200
-        self.sdata.baudrate = 921600
-        self.sctrl.open()
-        self.sdata.open()
-
-    def close(self):
-        self.sdata.close()
-        self.sctrl.close()
-
-    def cmd(self, buf):
-        if not self.sctrl.isOpen():
-            return None
-        self.sctrl.write(buf+'\n')
-        return self.sctrl.readline().strip()
-
-    def send(self, buf):
-        if not self.sdata.isOpen():
-            return -1
-        return self.sdata.write(buf)
-
-    def recv(self, size):
-        if not self.sdata.isOpen():
-            return None
-        return self.sdata.read(size)
-
-
-    """
-    Ping the device
-
-    C> PING
-    E> PONG
-    """
-    def ping(self):
-        return self.cmd('PING') == 'PONG'
-
-    """
-    Read version
-
-    C> VERSION
-    E> VERSION EDUBRM 1.0.0
-    """
-    def version(self):
-        r = self.cmd('VERSION')
-        if r and r.startswith('VERSION EDUBRM '):
-            return r[15:]
-        return None
-
-# TODO: ANALOG PINS
+# TODO: VERSION ?
 # TODO: PWM
 # TODO: SPI
+# TODO: SETPINS
+# TODO: CLEARPINS
 
-    """
-    Read current configuration
-
-    * O = output
-    * I = input
-    * F = input with glitch filter
-    * P = input with pull-up resistor(10kOhm)
-    * A = input with pull-up resistor and glitch filter
-    * Letter in uppercase means that pin is permitted
-    * Letter in lowercase means pin is not permitted
-
-    C> CFGIO
-    E> CFGIO FOOOPPPPPPPPPPPPOPfPPPPPPIIioAOP
-    """
-    def cfgio(self):
-        r = self.cmd('CFGIO')
-        if r and r.startswith('CFGIO '):
-            return r[6:]
-        return None
-
-    """
-    Configure GPIO
-
-    C> CFGIO iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
-    E> CFGIO OK
-    """
-    def cfgio(self, state):
-        return self.cmd('CFGIO ' + state) == 'CFGIO OK'
-
-    """
-    Read all inputs
-
-    C> GETIO
-    E> GETIO 10011111111111110111111111111101
-    """
-    def getio(self):
-        r = self.cmd('GETIO')
-        if r and r.startswith('GETIO '):
-            return r[6:]
-        return None
-
-    """
-    Set all outputs to logical 1
-
-    C> SETIO 11111111111111111111111111111111
-    E> SETIO OK
-    """
-    def setio(self, state):
-        return self.cmd('SETIO ' + state) == 'SETIO OK'
-
-    """
-    Set all outputs to logical 0
-
-    C> CLRIO 11111111111111111111111111111111
-    E> CLRIO OK
-    """
-    def clrio(self, state):
-        return self.cmd('CLRIO ' + state) == 'CLRIO OK'
-
-    """
-    Set oposite state on specified pin for specified duration
-
-    C> PULSE 8 100
-    E> PULSE OK
-    """
-    def pulse(self, pin, duration):
-        return self.cmd('PULSE ' + str(pin) + ' ' + str(duration)) == 'PULSE OK'
-
-    """
-    Set data transmission (from PC to mainboard)
-
-    C> DATAUP 10011111111111110111111111111101
-    E> DATAUP OK
-    """
-    def dataup(self, state):
-        return self.cmd('DATAUP ' + state) == 'DATAUP OK'
-
-    """
-    Set data transmission (from mainboard to PC)
-
-    C> DATADOWN 10011111111111110111111111111101
-    E> DATADOWN OK
-    """
-    def datadown(self, state):
-        return self.cmd('DATADOWN ' + state) == 'DATADOWN OK'
-
-    """
-    Stop data transmission in both directions
-
-    C> DATASTOP
-    E> DATASTOP OK
-    """
-    def datastop(self):
-        return self.cmd('DATASTOP') == 'DATASTOP OK'
+    def state(self):
+        # TODO: format?
+        return self.epi.read(self.INSIZE)
diff --git a/software/test-serial.py b/software/test-device.py
similarity index 70%
rename from software/test-serial.py
rename to software/test-device.py
index 9f37040..bef24b0 100755
--- a/software/test-serial.py
+++ b/software/test-device.py
@@ -3,5 +3,3 @@
 from device import Device
 
 d = Device()
-d.open('', '')
-d.close()