diff --git a/tool/bluetooth_company_id.py b/tool/bluetooth_company_id.py
index 9c435624e..bdf8f512f 100755
--- a/tool/bluetooth_company_id.py
+++ b/tool/bluetooth_company_id.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Scrape GATT UUIDs from Bluetooth SIG page
 # https://www.bluetooth.com/specifications/assigned-numbers/company-identifiers
diff --git a/tool/bluetooth_data_types.py b/tool/bluetooth_data_types.py
index 1e72c48b2..d4b868215 100755
--- a/tool/bluetooth_data_types.py
+++ b/tool/bluetooth_data_types.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Scrape GAP Data Types from Bluetooth SIG page
 # Copyright 2016 BlueKitchen GmbH
diff --git a/tool/bluetooth_gatt.py b/tool/bluetooth_gatt.py
index dbf309bcd..73df2d31b 100755
--- a/tool/bluetooth_gatt.py
+++ b/tool/bluetooth_gatt.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Scrape GATT UUIDs from Bluetooth SIG page
 # Copyright 2016 BlueKitchen GmbH
diff --git a/tool/bluetooth_psm.py b/tool/bluetooth_psm.py
index 0cac8230e..b0e3d10f3 100755
--- a/tool/bluetooth_psm.py
+++ b/tool/bluetooth_psm.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Scrape GATT UUIDs from Bluetooth SIG page
 # https://www.bluetooth.com/specifications/assigned-numbers/logical-link-control/
diff --git a/tool/bluetooth_sdp.py b/tool/bluetooth_sdp.py
index 830358d98..7d7fbfd22 100755
--- a/tool/bluetooth_sdp.py
+++ b/tool/bluetooth_sdp.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Scrape SDP UUIDs from Bluetooth SIG page
 # Copyright 2017 BlueKitchen GmbH
@@ -69,11 +69,11 @@ def remove_newlines(remark):
 def process_rows(fout, rows, pattern):
     for row in rows:
         columns = row.getchildren()
-        name = columns[0].text_content().encode('ascii','ignore')
-        value = columns[1].text_content().encode('ascii','ignore')
+        name = columns[0].text_content().replace(u'\u2013','').replace(u'\u200b','')
+        value = columns[1].text_content().replace(u'\u200b','')
         remark = ''
         if (len(columns) > 2):
-            remark = columns[2].text_content().encode('ascii','ignore')
+            remark = columns[2].text_content().replace(u'\u200b','')
         # skip tbody headers
         if name in ["Protocol Name", "Service Class Name", "Attribute Name", "UUID Name", 
             "Reserved", 'Reserved for HID Attributes', 'Available for HID Language Strings']:
@@ -82,6 +82,11 @@ def process_rows(fout, rows, pattern):
         if value.startswith('(Max value '):
             continue 
         name = create_pretty_define(name)
+        print(name)
+        if name.endswith("DISPLAY"):
+            for c in name:
+                print("ord %c = 0x%x" % (c, ord(c)))
+
         # skip duplicate attributes
         if name in defines:
             continue
diff --git a/tool/btstack_event_generator.py b/tool/btstack_event_generator.py
index 536eccde3..e3c3d8426 100755
--- a/tool/btstack_event_generator.py
+++ b/tool/btstack_event_generator.py
@@ -1,5 +1,5 @@
-#!/usr/bin/env python
 # BlueKitchen GmbH (c) 2014
+#!/usr/bin/env python3
 
 import glob
 import re
@@ -308,7 +308,7 @@ def create_events(events):
                     else:
                         last_variable_length_field_pos = offset
                 if field_type in 'V':
-                    if last_variable_length_field_pos >= 0:
+                    if last_variable_length_field_pos != '':
                         if offset_is_number:
                             # convert to string
                             offset = '((uint8_t) %u)' % offset
diff --git a/tool/btstack_memory_generator.py b/tool/btstack_memory_generator.py
index 77db908cf..d56d924a0 100755
--- a/tool/btstack_memory_generator.py
+++ b/tool/btstack_memory_generator.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import os
 import sys
 
@@ -107,8 +107,11 @@ hfile_header_end = """
 """
 
 cfile_header_begin = """
+#define BTSTACK_FILE__ "btstack_memory.c"
+
+
 /*
- *  btstack_memory.h
+ *  btstack_memory.c
  *
  *  @brief BTstack memory management via configurable memory pools
  *
diff --git a/tool/btstack_parser.py b/tool/btstack_parser.py
index e3db82e99..4d64b2406 100755
--- a/tool/btstack_parser.py
+++ b/tool/btstack_parser.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # BlueKitchen GmbH (c) 2014
 
 import re
diff --git a/tool/btstack_rtos_generator.py b/tool/btstack_rtos_generator.py
index ed1dcd446..8bc173740 100755
--- a/tool/btstack_rtos_generator.py
+++ b/tool/btstack_rtos_generator.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import os, sys, getopt, re, pickle
 
 copyright = """/*
diff --git a/tool/convert_gatt_service.py b/tool/convert_gatt_service.py
index db63fcad4..4a5825d17 100755
--- a/tool/convert_gatt_service.py
+++ b/tool/convert_gatt_service.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Convert offical Bluetooth GATT Service definitions into BTstack's .gatt format
 # Copyright 2016 BlueKitchen GmbH
diff --git a/tool/create_makefile_inc.py b/tool/create_makefile_inc.py
index b21179993..dcf154c0d 100755
--- a/tool/create_makefile_inc.py
+++ b/tool/create_makefile_inc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Create Makefile.inc file for all source folders
 # Copyright 2017 BlueKitchen GmbH
diff --git a/tool/create_packet_log.py b/tool/create_packet_log.py
index 3fbfd8b97..e97fae827 100755
--- a/tool/create_packet_log.py
+++ b/tool/create_packet_log.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # BlueKitchen GmbH (c) 2014
 
 # convert log output to PacketLogger format
@@ -91,7 +91,7 @@ if len(sys.argv) == 1:
 	print('BTstack Console to PacketLogger converter')
 	print('Copyright 2014, BlueKitchen GmbH')
 	print('')
-	print('Usage: ', sys.argv[0], 'asci-log-file.txt [hci_dump.pkgl]')
+	print('Usage: ', sys.argv[0], 'ascii-log-file.txt [hci_dump.pklg]')
 	print('Converted hci_dump.pklg can be viewed with Wireshark and OS X PacketLogger')
 	exit(0)
 
diff --git a/tool/dump_pklg.py b/tool/dump_pklg.py
index 5beef05d9..f7e5c211e 100755
--- a/tool/dump_pklg.py
+++ b/tool/dump_pklg.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # BlueKitchen GmbH (c) 2014
 
 # primitive dump for PacketLogger format
@@ -11,9 +11,7 @@
 # 	uint8_t		type;   // 0xfc for note
 # }
 
-import re
 import sys
-import time
 import datetime
 
 packet_types = [ "CMD =>", "EVT <=", "ACL =>", "ACL <="]
@@ -36,14 +34,14 @@ def read_net_32(f):
 def as_hex(data):
 	str_list = []
 	for byte in data:
-	    str_list.append("{0:02x} ".format(ord(byte)))
+	    str_list.append("{0:02x} ".format(byte))
 	return ''.join(str_list)
 
 if len(sys.argv) == 1:
-	print 'Dump PacketLogger file'
-	print 'Copyright 2014, BlueKitchen GmbH'
-	print ''
-	print 'Usage: ', sys.argv[0], 'hci_dump.pklg'
+	print ('Dump PacketLogger file')
+	print ('Copyright 2014, BlueKitchen GmbH')
+	print ('')
+	print ('Usage: ', sys.argv[0], 'hci_dump.pklg')
 	exit(0)
 
 infile = sys.argv[1]
@@ -66,10 +64,9 @@ with open (infile, 'rb') as fin:
 			pos     = pos + 4 + len
 			time    = "[%s.%03u]" % (datetime.datetime.fromtimestamp(ts_sec).strftime("%Y-%m-%d %H:%M:%S"), ts_usec / 1000)
 			if type == 0xfc:
-				print time, "LOG", packet
+				print (time, "LOG", packet.decode('ascii'))
 				continue
 			if type <= 0x03:
-				print time, packet_types[type], as_hex(packet)
+				print (time, packet_types[type], as_hex(packet))
 	except TypeError:
 		print ("Error parsing pklg at offset %u (%x)." % (pos, pos))
-
diff --git a/tool/dump_tlv.py b/tool/dump_tlv.py
index e8eed4322..ba135d768 100755
--- a/tool/dump_tlv.py
+++ b/tool/dump_tlv.py
@@ -1,12 +1,9 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # BlueKitchen GmbH (c) 2017
 
 # primitive dump for .tlv format
 
-import re
 import sys
-import time
-import datetime
 
 def read_net_32(f):
     a = f.read(1)
@@ -26,14 +23,14 @@ def read_net_32(f):
 def as_hex(data):
 	str_list = []
 	for byte in data:
-	    str_list.append("{0:02x} ".format(ord(byte)))
+	    str_list.append("{0:02x} ".format(byte))
 	return ''.join(str_list)
 
 if len(sys.argv) == 1:
-	print 'Dump TLV file'
-	print 'Copyright 2017, BlueKitchen GmbH'
-	print ''
-	print 'Usage: ', sys.argv[0], 'file.tlv'
+	print ('Dump TLV file')
+	print ('Copyright 2017, BlueKitchen GmbH')
+	print ('')
+	print ('Usage: ', sys.argv[0], 'file.tlv')
 	exit(0)
 
 infile = sys.argv[1]
@@ -65,4 +62,3 @@ with open (infile, 'rb') as fin:
 
 	except TypeError:
 		print ("Error parsing tlv at offset %u (%x)." % (pos, pos))
-
diff --git a/tool/java_binding.py b/tool/java_binding.py
index 192a6b19a..5dfd04db5 100755
--- a/tool/java_binding.py
+++ b/tool/java_binding.py
@@ -1,10 +1,6 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # BlueKitchen GmbH (c) 2014
 
-import glob
-import re
-import sys
-
 import btstack_parser as parser
 
 print('''
@@ -361,7 +357,7 @@ def create_event_factory(events, subevents, defines):
         if not event_supported(event_name):
             continue
         class_name = class_name_for_event(event_name)
-        print class_name
+        print(class_name)
         subcases += java_event_factory_subevent.format(event_type, class_name)
 
     with open(outfile, 'wt') as fout:
diff --git a/tool/misc/update_copyright.py b/tool/misc/update_copyright.py
old mode 100644
new mode 100755
index b1a7f6cd0..ab33ebe40
--- a/tool/misc/update_copyright.py
+++ b/tool/misc/update_copyright.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import os
 import re
 
@@ -113,8 +113,10 @@ def requiresCopyrightUpdate(file_name):
 	global copyrightString, onlyDumpDifferentCopyright
 	exactCopyrightFound = False
 
-	with open(file_name, "rb") as fin:
+	with open(file_name, "rt") as fin:
+		print("File: " + file_name)
 		for line in fin:
+			print("Line: " + line)
 			parts = re.match('.*('+copyrightString+').*',line)
 			if parts:
 				exactCopyrightFound = True
diff --git a/tool/python_generator.py b/tool/python_generator.py
index b92dae651..6d4183944 100755
--- a/tool/python_generator.py
+++ b/tool/python_generator.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # BlueKitchen GmbH (c) 2018
 
 import glob
diff --git a/tool/sine_table_generator.py b/tool/sine_table_generator.py
index 85e98bdd7..bb7358f28 100755
--- a/tool/sine_table_generator.py
+++ b/tool/sine_table_generator.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import math
 import sys
 
@@ -33,8 +33,8 @@ if __name__ == "__main__":
         print(usage)
         sys.exit(1)
 
-    sine_num_samples = sine_sample_rate/sine_frequency        
-    
+    sine_num_samples = int(sine_sample_rate/sine_frequency)
+    print(type(sine_num_samples).__name__)
     print(sine_array.format(sine_sample_rate=sine_sample_rate, sine_frequency=sine_frequency))
     items = 0
     for sample in range(0,sine_num_samples):
@@ -42,9 +42,9 @@ if __name__ == "__main__":
         angle = (sample * 360.0) / sine_num_samples      
         sine = math.sin(math.radians(angle))
         rescaled = int(round(sine * 32767))
-        print ("%6d, " % rescaled),
+        print ("%6d, " % rescaled, end=''),
         if items == VALUES_PER_LINE:
             items = 0
-            print
+            print("")
     
     print( "};")
diff --git a/tool/update_filename.py b/tool/update_filename.py
index e7b22d5f2..bfe310d6b 100755
--- a/tool/update_filename.py
+++ b/tool/update_filename.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import os
 import re
 
@@ -70,7 +70,7 @@ def update_filename_tag(dir_name, file_name, has_tag):
 
 def get_filename_tag(file_path):
 	basename = os.path.basename(file_path)
-	with open(file_path, "rb") as fin:
+	with open(file_path, "rt") as fin:
 		for line in fin:
 			parts = re.match(filetag_re,line)
 			if not parts:
diff --git a/tool/uuid128_formats.py b/tool/uuid128_formats.py
index 96b64b147..8e2a08847 100755
--- a/tool/uuid128_formats.py
+++ b/tool/uuid128_formats.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Parase and dump UUID128 in various formats