diff --git a/tools/printfile.py b/tools/printfile.py
new file mode 100644
index 0000000..d6c4ffc
--- /dev/null
+++ b/tools/printfile.py
@@ -0,0 +1,76 @@
+#! /usr/bin/env python3
+import serial
+import codecs
+
+import argparse
+
+
+serialdevice='/dev/ttyUSB0'
+
+
+
+chars=" qwertzuiopü+asdfghjklöä#yxcvbnm,.-QWERTZUIOPÜ*ASDFGHJKLÖÄ'YXCVBNM;:_1234567890ß!\"§$%&/()=?"
+
+
+
+'''
+Teilung 10: 65
+Teilung 12: 78
+Teilung 15: 97
+'''
+
+def main():
+    parser = argparse.ArgumentParser(description='Send Textfile over serial')
+    parser.add_argument('filename', help="file to print")
+    parser.add_argument('-d', '--device', nargs='?', help="serial device name")
+    parser.add_argument('-l', '--length', nargs='?', type=int, help="maximum line length")
+    parser.add_argument('-x','--dryrun', action="store_true", help="do not send anything to printer")
+    
+    args = parser.parse_args()
+    
+    charsperline=65
+    if args.length is not None:
+        charsperline=int(args.length)
+        print("args.length: "+str(args.length))
+    print("Checking for maximum line length: "+str(charsperline))
+        
+    
+    filename=args.filename
+    if args.device is not None:
+        serialdevice=args.device
+
+    lines=[]
+
+    with codecs.open(filename, encoding='utf-8') as file:
+        lines=file.readlines()
+        
+    lines=[x.rstrip() for x in lines] # remove whitespaces and linebreaks
+    
+    for iline,line in enumerate(lines):
+        if not set(line).issubset(chars):
+            print(str(iline)+":"+str(line))
+            print("Contains non printable characters")
+            exit()
+        if len(line)>charsperline:
+            print(str(iline)+":"+str(line))
+            print("Line is too long." +str(len(line))+">"+str(charsperline))
+            exit()
+            
+    if (args.dryrun):
+        print("Dry Run enabled. Exiting")
+        exit()
+        
+    with serial.Serial(serialdevice, 9600, timeout=1) as ser:
+        
+        for line in lines:
+            print(line)
+            ser.write(line.encode())
+            ser.write(b'\n')
+
+
+
+
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tools/test_keyboard.py b/tools/test_keyboard.py
index 91682ae..ef07c94 100644
--- a/tools/test_keyboard.py
+++ b/tools/test_keyboard.py
@@ -1,10 +1,13 @@
 #! /usr/bin/env python3
 import serial
 
+#serialdevice='/dev/ttyUSB0'
+serialdevice='COM3'
+
 chars=" qwertzuiopü+asdfghjklöä#yxcvbnm,.-QWERTZUIOPÜ*ASDFGHJKLÖÄ'YXCVBNM;:_1234567890ß!\"§$%&/()=?"
 
 def main():
-    with serial.Serial('/dev/ttyUSB0', 9600, timeout=1) as ser:
+    with serial.Serial(serialdevice, 9600, timeout=1) as ser:
         
 
         print("ZWÖLF BOXKÄMPFER JAGEN VIKTOR QUER ÜBER DEN GROßEN SYLTER DEICH.")