diff --git a/tools/logClusterBootup.sh b/tools/logClusterBootup.sh
index f6d49fd..b6a9e26 100755
--- a/tools/logClusterBootup.sh
+++ b/tools/logClusterBootup.sh
@@ -1,9 +1,12 @@
 #!/bin/bash
 
 # reset the mux device to default values
-pypy ./muxctrl.py -g -m -l 0 -s 115200
+python ./muxctrl.py -g -m -l 0 -s 115200
 
 # TODO start logging of the received data
+./readTTYToFile.sh /dev/ttyACM1 &
+
+sleep 2
 
 # read from line 0 to 7
 for i in `seq 0 7`;
@@ -18,6 +21,7 @@ done
 sleep 3
 
 # TODO stop logging of the received data
+killall -12 readTTYToFile.sh
 
-pypy ./muxctrl.py -g -m -l 0 -s 115200
+python ./muxctrl.py -g -m -l 0 -s 115200
 
diff --git a/tools/muxctrl.py b/tools/muxctrl.py
index ec19566..1416cdc 100755
--- a/tools/muxctrl.py
+++ b/tools/muxctrl.py
@@ -16,6 +16,7 @@ parser.add_argument("-s", "--setBaudrate",       type=int, help="Something like
 parser.add_argument("-m", "--getMuxLine",   default=False, help="Get the current multiplexer control line state.", action='store_true')
 parser.add_argument("-l", "--setMuxLine",        type=int, help="Something like 0 to 7.")
 parser.add_argument("-r", "--resetToBtldr", default=False, help="Reset the device to the LUFA bootloader.", action='store_true')
+parser.add_argument("-d", "--device",            type=str, help="The control device like /dev/ttyACM0 or COM3.")
 
 ###############################################################################
 
@@ -53,7 +54,8 @@ MUX_MAX_VAL = 7
 
 ###############################################################################
 
-ser = None
+ser    = None
+device = "/dev/ttyACM0"
 
 ###############################################################################
 
@@ -308,7 +310,11 @@ def openSerialDevice(d):
   global ser
 
   # Why 115200? Because the host defines the baudrate for the USB serial connection.
-  ser = serial.Serial(d, 115200, timeout=0)
+  try:
+    ser = serial.Serial(d, 115200, timeout=0)
+  except:
+    print "ERROR: Can't open the serial device " + device
+    exit(1)
 
 #####
 def closeSerialDevice():
@@ -339,7 +345,9 @@ if __name__ == "__main__":
   timeout  = 0
 
   # 1. open serial device or abort
-  openSerialDevice("/dev/ttyACM0")
+  if args.device != None:
+    device = args.device
+    openSerialDevice(device)
 
   # 2. start thread to poll cc_dataReceiverThread()
   cc_startReceiverThread()
diff --git a/tools/readTTYToFile.sh b/tools/readTTYToFile.sh
new file mode 100755
index 0000000..12885e5
--- /dev/null
+++ b/tools/readTTYToFile.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+TTY_DEV=$1 # or /dev/ttyACM1
+OUT_FILE=$2
+
+if [ -z "$TTY_DEV" ];
+then
+  TTY_DEV=/dev/ttyACM1
+fi
+
+if [ -z "$OUT_FILE" ];
+then
+  OUT_FILE="tty_bootup_seq.log"
+fi
+
+echo "Read from "$TTY_DEV" and write to "$OUT_FILE
+
+while read line; do
+     if [ "$line" != "EOF" ]; then
+          echo "$line" >> $OUT_FILE
+     else
+          break
+     fi
+done < $TTY_DEV