diff --git a/tools/bbf_common.py b/tools/bbf_common.py
index 2ed111f9..b323a9f5 100755
--- a/tools/bbf_common.py
+++ b/tools/bbf_common.py
@@ -114,7 +114,7 @@ def clean_supported_dm_list():
     LIST_SUPPORTED_DM.clear()
 
 def fill_list_supported_dm():
-    fp = open(DATA_MODEL_FILE, 'r')
+    fp = open(DATA_MODEL_FILE, 'r', encoding='utf-8')
     Lines = fp.readlines()
 
     for line in Lines:
@@ -122,7 +122,7 @@ def fill_list_supported_dm():
 
 
 def fill_data_model_file():
-    fp = open(DATA_MODEL_FILE, 'a')
+    fp = open(DATA_MODEL_FILE, 'a', encoding='utf-8')
     for value in LIST_SUPPORTED_DM:
         print("%s" % value, file=fp)
     fp.close()
@@ -138,7 +138,7 @@ def generate_datamodel_tree(filename):
     table_name = ""
     parent_obj = ""
 
-    fp = open(filename, 'r')
+    fp = open(filename, 'r', encoding='utf-8')
     for line in fp:
 
         if "DMOBJ" in line:
@@ -225,7 +225,7 @@ def generate_dynamic_datamodel_tree(filename):
 
     obj_found = 0
 
-    fp = open(filename, 'r')
+    fp = open(filename, 'r', encoding='utf-8')
     for line in fp:
 
         if "DM_MAP_OBJ" in line:
@@ -289,7 +289,7 @@ def generate_dynamic_json_datamodel_tree(filename):
     if filename.endswith('.json') is False:
         return
 
-    json_file = open(filename, "r")
+    json_file = open(filename, "r", encoding='utf-8')
     data = json.loads(json_file.read(), object_pairs_hook=OrderedDict)
 
     for obj, value in data.items():
diff --git a/tools/convert_dm_json_to_c.py b/tools/convert_dm_json_to_c.py
index 326cbd4a..48b3438f 100755
--- a/tools/convert_dm_json_to_c.py
+++ b/tools/convert_dm_json_to_c.py
@@ -115,7 +115,7 @@ def get_mapping_param(mappingobj):
 
 
 def printGlobalstrCommon(str_exp):
-    fp = open(DMC_DIR + "/common.c", 'a')
+    fp = open(DMC_DIR + "/common.c", 'a', encoding='utf-8')
     print("%s" % str_exp, file=fp)
     fp.close()
 
@@ -327,20 +327,20 @@ def generate_validate_value(dmparam, value):
 
 
 def printheaderObjCommon(objname):
-    fp = open('./.objparamarray.c', 'a')
+    fp = open('./.objparamarray.c', 'a', encoding='utf-8')
     print("/* *** %s *** */" % objname, file=fp)
     fp.close()
 
 
 def cprintheaderOBJS(objname):
-    fp = open('./.objparamarray.c', 'a')
+    fp = open('./.objparamarray.c', 'a', encoding='utf-8')
     print("DMOBJ %s[] = {" % ("t" + getname(objname) + "Obj"), file=fp)
     print("/* OBJ, permission, addobj, delobj, checkdep, browseinstobj, nextdynamicobj, dynamicleaf, nextobj, leaf, linker, bbfdm_type, uniqueKeys*/", file=fp)
     fp.close()
 
 
 def hprintheaderOBJS(objname):
-    fp = open('./.objparamarray.h', 'a')
+    fp = open('./.objparamarray.h', 'a', encoding='utf-8')
     print("extern DMOBJ %s[];" % ("t" + getname(objname) + "Obj"), file=fp)
     fp.close()
 
@@ -385,7 +385,7 @@ def hprintfootfile(fp, filename):
 
 
 def cprintAddDelObj(faddobj, fdelobj, name, mappingobj, _dmobject):
-    fp = open('./.objadddel.c', 'a')
+    fp = open('./.objadddel.c', 'a', encoding='utf-8')
     print("static int %s(char *refparam, struct dmctx *ctx, void *data, char **instance)" %
           faddobj, file=fp)
     print("{", file=fp)
@@ -468,7 +468,7 @@ def cprintAddDelObj(faddobj, fdelobj, name, mappingobj, _dmobject):
 
 def cprintBrowseObj(fbrowse, name, mappingobj, dmobject):
     # Open file
-    fp = open('./.objbrowse.c', 'a')
+    fp = open('./.objbrowse.c', 'a', encoding='utf-8')
 
     # Mapping Parameter
     if mappingobj is not None:
@@ -543,7 +543,7 @@ def cprintBrowseObj(fbrowse, name, mappingobj, dmobject):
 
 def cprintGetSetValue(getvalue, setvalue, mappingparam, instance, typeparam, parentname, dmparam, value):
     # Open file
-    fp = open('./.getstevalue.c', 'a')
+    fp = open('./.getstevalue.c', 'a', encoding='utf-8')
 
     # Generate Validate value
     validate_value = ""
@@ -800,7 +800,7 @@ def cprintGetSetValue(getvalue, setvalue, mappingparam, instance, typeparam, par
 
 def cprintOperateCommands(getoperateargs, operate, in_args, out_args, struct_name):
     # Open file
-    fp = open('./.operatecommands.c', 'a')
+    fp = open('./.operatecommands.c', 'a', encoding='utf-8')
     
     if in_args != None or out_args != None:
         ############################## OPERATE ARGUMENTS ########################################
@@ -846,7 +846,7 @@ def cprintOperateCommands(getoperateargs, operate, in_args, out_args, struct_nam
 
 def cprintEvent(geteventargs, param_args, struct_name):
     # Open file
-    fp = open('./.events.c', 'a')
+    fp = open('./.events.c', 'a', encoding='utf-8')
     
     if param_args != None:
         ############################## OPERATE ARGUMENTS ########################################
@@ -873,14 +873,14 @@ def cprintEvent(geteventargs, param_args, struct_name):
 
 
 def cprintheaderPARAMS(objname):
-    fp = open('./.objparamarray.c', 'a')
+    fp = open('./.objparamarray.c', 'a', encoding='utf-8')
     print("DMLEAF %s[] = {" % ("t" + getname(objname) + "Params"), file=fp)
     print("/* PARAM, permission, type, getvalue, setvalue, bbfdm_type*/", file=fp)
     fp.close()
 
 
 def hprintheaderPARAMS(objname):
-    fp = open('./.objparamarray.h', 'a')
+    fp = open('./.objparamarray.h', 'a', encoding='utf-8')
     print("extern DMLEAF %s[];" % ("t" + getname(objname) + "Params"), file=fp)
     fp.close()
 
@@ -909,7 +909,7 @@ def printPARAMline(parentname, dmparam, value):
     cprintGetSetValue(getvalue, setvalue, mappingparam,
                       instance, typeparam, parentname, dmparam, value)
 
-    fp = open('./.objparamarray.c', 'a')
+    fp = open('./.objparamarray.c', 'a', encoding='utf-8')
     print("{\"%s\", %s, %s, %s, %s, %s}," %
           (dmparam, access, ptype, getvalue, setvalue, bbfdm), file=fp)
     fp.close()
@@ -936,7 +936,7 @@ def printCOMMANDline( parentname, dmparam, value ):
 
     cprintOperateCommands(getoperateargs, operate, in_args, out_args, commonname.replace("()", "").lower()+"_args")
 
-    fp = open('./.objparamarray.c', 'a')
+    fp = open('./.objparamarray.c', 'a', encoding='utf-8')
     print("{\"%s\", %s, %s, %s, %s, %s}," % (dmparam, c_type, ptype, getoperateargs, operate, bbfdm), file=fp)
     fp.close()
 
@@ -953,13 +953,13 @@ def printEVENTline( parentname, dmparam, value ):
     else:
         geteventargs = "NULL"
 
-    fp = open('./.objparamarray.c', 'a')
+    fp = open('./.objparamarray.c', 'a', encoding='utf-8')
     print("{\"%s\", &DMREAD, %s, %s, NULL, %s}," % (dmparam, ptype, geteventargs, bbfdm), file=fp)
     fp.close()
 
 
 def printtailArray():
-    fp = open('./.objparamarray.c', 'a')
+    fp = open('./.objparamarray.c', 'a', encoding='utf-8')
     print("{0}", file=fp)
     print("};", file=fp)
     print("", file=fp)
@@ -1003,7 +1003,7 @@ def printOBJline(dmobject, value):
     else:
         paramarray = "NULL"
 
-    fp = open('./.objparamarray.c', 'a')
+    fp = open('./.objparamarray.c', 'a', encoding='utf-8')
     if uniquekeys:
         print("{\"%s\", %s, %s, %s, NULL, %s, NULL, NULL, %s, %s, NULL, %s, %s}," % (getlastname(
             dmobject), access, faddobj, fdelobj, fbrowse, objchildarray, paramarray, bbfdm, uniquekeys), file=fp)
@@ -1089,8 +1089,8 @@ def generatecfromobj(pobj, pvalue, pdir, nextlevel):
     removetmpfiles()
     object_parse_childs(pobj, pvalue, nextlevel)
 
-    dmfpc = open(pdir + "/" + getname(pobj).lower() + ".c", "w")
-    dmfph = open(pdir + "/" + getname(pobj).lower() + ".h", "w")
+    dmfpc = open(pdir + "/" + getname(pobj).lower() + ".c", "w", encoding='utf-8')
+    dmfph = open(pdir + "/" + getname(pobj).lower() + ".h", "w", encoding='utf-8')
     cprinttopfile(dmfpc, getname(pobj).lower())
     hprinttopfile(dmfph, getname(pobj).lower())
 
@@ -1102,7 +1102,7 @@ def generatecfromobj(pobj, pvalue, pdir, nextlevel):
             print("* ENTRY METHOD", file=dmfpc)
             print(
                 "**************************************************************/", file=dmfpc)
-        tmpf = open("./.objbrowse.c", "r")
+        tmpf = open("./.objbrowse.c", "r", encoding='utf-8')
         tmpd = tmpf.read()
         tmpf.close()
         dmfpc.write(tmpd)
@@ -1117,7 +1117,7 @@ def generatecfromobj(pobj, pvalue, pdir, nextlevel):
             print("* ADD & DEL OBJ", file=dmfpc)
             print(
                 "**************************************************************/", file=dmfpc)
-        tmpf = open("./.objadddel.c", "r")
+        tmpf = open("./.objadddel.c", "r", encoding='utf-8')
         tmpd = tmpf.read()
         tmpf.close()
         dmfpc.write(tmpd)
@@ -1132,7 +1132,7 @@ def generatecfromobj(pobj, pvalue, pdir, nextlevel):
             print("* GET & SET PARAM", file=dmfpc)
             print(
                 "**************************************************************/", file=dmfpc)
-        tmpf = open("./.getstevalue.c", "r")
+        tmpf = open("./.getstevalue.c", "r", encoding='utf-8')
         tmpd = tmpf.read()
         tmpf.close()
         dmfpc.write(tmpd)
@@ -1145,7 +1145,7 @@ def generatecfromobj(pobj, pvalue, pdir, nextlevel):
             print("/*************************************************************", file=dmfpc)
             print("* OPERATE COMMANDS", file=dmfpc)
             print("**************************************************************/", file=dmfpc)
-        tmpf = open("./.operatecommands.c", "r")
+        tmpf = open("./.operatecommands.c", "r", encoding='utf-8')
         tmpd = tmpf.read()
         tmpf.close()
         dmfpc.write(tmpd)
@@ -1158,7 +1158,7 @@ def generatecfromobj(pobj, pvalue, pdir, nextlevel):
             print("/*************************************************************", file=dmfpc)
             print("* EVENTS", file=dmfpc)
             print("**************************************************************/", file=dmfpc)
-        tmpf = open("./.events.c", "r")
+        tmpf = open("./.events.c", "r", encoding='utf-8')
         tmpd = tmpf.read()
         tmpf.close()
         dmfpc.write(tmpd)
@@ -1169,7 +1169,7 @@ def generatecfromobj(pobj, pvalue, pdir, nextlevel):
         print("/**********************************************************************************************************************************", file=dmfpc)
         print("*                                            OBJ & PARAM DEFINITION", file=dmfpc)
         print("***********************************************************************************************************************************/", file=dmfpc)
-        tmpf = open("./.objparamarray.c", "r")
+        tmpf = open("./.objparamarray.c", "r", encoding='utf-8')
         tmpd = tmpf.read()
         tmpf.close()
         dmfpc.write(tmpd)
@@ -1177,7 +1177,7 @@ def generatecfromobj(pobj, pvalue, pdir, nextlevel):
         pass
 
     try:
-        tmpf = open("./.objparamarray.h", "r")
+        tmpf = open("./.objparamarray.h", "r", encoding='utf-8')
         tmpd = tmpf.read()
         tmpf.close()
         dmfph.write(tmpd)
@@ -1215,7 +1215,7 @@ for index in range(sys.argv[1].count(',') + 1):
     JSON_FILE = bbf.ARRAY_JSON_FILES.get(dm_name[index], None)
 
     if JSON_FILE is not None:
-        j_file = open(JSON_FILE, "r")
+        j_file = open(JSON_FILE, "r", encoding='utf-8')
         data = json.loads(j_file.read(), object_pairs_hook=OrderedDict)
 
         for dm_obj, dm_value in data.items():
diff --git a/tools/convert_dm_xml_to_json.py b/tools/convert_dm_xml_to_json.py
index fa3612c8..5b860138 100755
--- a/tools/convert_dm_xml_to_json.py
+++ b/tools/convert_dm_xml_to_json.py
@@ -244,7 +244,7 @@ def generatelistfromfile(dmobject):
         pathfile = pathfilename if x == 0 else pathiopsyswrtfilename
         exists = os.path.isfile(pathfile)
         if exists:
-            filec = open(pathfile, "r")
+            filec = open(pathfile, "r", encoding='utf-8')
             for linec in filec:
                 if "/*#" in linec:
                     listmapping.append(linec)
@@ -326,7 +326,7 @@ def getuniquekeys(dmobject):
 
 
 def printopenobject(obj):
-    fp = open('./.json_tmp', 'a')
+    fp = open('./.json_tmp', 'a', encoding='utf-8')
     if "tr-104" in sys.argv[1] or "tr-135" in sys.argv[1]:
         print("\"Device.Services.%s\" : {" % obj.get(
             'name').replace(" ", ""), file=fp)
@@ -336,19 +336,19 @@ def printopenobject(obj):
 
 
 def printopenfile():
-    fp = open('./.json_tmp', 'a')
+    fp = open('./.json_tmp', 'a', encoding='utf-8')
     print("{", file=fp)
     fp.close()
 
 
 def printclosefile():
-    fp = open('./.json_tmp', 'a')
+    fp = open('./.json_tmp', 'a', encoding='utf-8')
     print("}", file=fp)
     fp.close()
 
 
 def printOBJMaPPING(mapping):
-    fp = open('./.json_tmp', 'a')
+    fp = open('./.json_tmp', 'a', encoding='utf-8')
     config_type = mapping.split(":")
     config = config_type[1].split("/")
     print("\"mapping\": {", file=fp)
@@ -379,7 +379,7 @@ def printOBJMaPPING(mapping):
 
 
 def printPARAMMaPPING(mapping):
-    fp = open('./.json_tmp', 'a')
+    fp = open('./.json_tmp', 'a', encoding='utf-8')
     lst = mapping.split("&")
     print("\"mapping\": [", file=fp)
     for i in range(len(lst)):
@@ -441,19 +441,19 @@ def printPARAMMaPPING(mapping):
 
 
 def removelastline():
-    file = open("./.json_tmp")
+    file = open("./.json_tmp", encoding='utf-8')
     lines = file.readlines()
     lines = lines[:-1]
     file.close()
-    w = open("./.json_tmp", 'w')
+    w = open("./.json_tmp", 'w', encoding='utf-8')
     w.writelines(lines)
     w.close()
     printclosefile()
 
 
 def replace_data_in_file(data_in, data_out):
-    file_r = open("./.json_tmp", "rt")
-    file_w = open("./.json_tmp_1", "wt")
+    file_r = open("./.json_tmp", "rt", encoding='utf-8')
+    file_w = open("./.json_tmp_1", "wt", encoding='utf-8')
     text = ''.join(file_r).replace(data_in, data_out)
     file_w.write(text)
     file_r.close()
@@ -487,7 +487,7 @@ def printOBJ(dmobject, hasobj, hasparam, bbfdm_type):
     else:
         fbrowse = "false"
 
-    fp = open('./.json_tmp', 'a')
+    fp = open('./.json_tmp', 'a', encoding='utf-8')
     print("\"type\" : \"object\",", file=fp)
     print("\"version\" : \"%s\"," % dmobject.get('version'), file=fp)
     print("\"protocols\" : [%s]," % bbfdm_type, file=fp)
@@ -511,7 +511,7 @@ def printPARAM(dmparam, dmobject, bbfdm_type):
     islist, datatype, paramvalrange, paramenum, paramunit, parampattern, listminItem, listmaxItem, listmaxsize = getparamoption(
         dmparam)
 
-    fp = open('./.json_tmp', 'a')
+    fp = open('./.json_tmp', 'a', encoding='utf-8')
     print("\"%s\" : {" % dmparam.get('name').replace(" ", ""), file=fp)
     print("\"type\" : \"%s\"," % getparamtype(dmparam), file=fp)
     print("\"read\" : true,", file=fp)
@@ -606,7 +606,7 @@ def printPARAM(dmparam, dmobject, bbfdm_type):
 
 
 def printCOMMAND(dmparam, dmobject, _bbfdm_type):
-    fp = open('./.json_tmp', 'a')
+    fp = open('./.json_tmp', 'a', encoding='utf-8')
     print("\"%s\" : {" % dmparam.get('name'), file=fp)
     print("\"type\" : \"command\",", file=fp)
     print("\"async\" : %s," %
@@ -630,7 +630,7 @@ def printCOMMAND(dmparam, dmobject, _bbfdm_type):
                 if param.tag == "parameter":
                     fp.close()
                     printPARAM(param, dmobject, "\"usp\"")
-            fp = open('./.json_tmp', 'a')
+            fp = open('./.json_tmp', 'a', encoding='utf-8')
             print("}" if outputfound else "},", file=fp)
 
         if c.tag == "output":
@@ -639,7 +639,7 @@ def printCOMMAND(dmparam, dmobject, _bbfdm_type):
                 if param.tag == "parameter":
                     fp.close()
                     printPARAM(param, dmobject, "\"usp\"")
-            fp = open('./.json_tmp', 'a')
+            fp = open('./.json_tmp', 'a', encoding='utf-8')
             print("}", file=fp)
 
     print("}", file=fp)
@@ -647,7 +647,7 @@ def printCOMMAND(dmparam, dmobject, _bbfdm_type):
 
 
 def printEVENT(dmparam, dmobject, _bbfdm_type):
-    fp = open('./.json_tmp', 'a')
+    fp = open('./.json_tmp', 'a', encoding='utf-8')
     print("\"%s\" : {" % dmparam.get('name'), file=fp)
     print("\"type\" : \"event\",", file=fp)
     print("\"version\" : \"%s\"," % dmparam.get('version'), file=fp)
@@ -667,7 +667,7 @@ def printEVENT(dmparam, dmobject, _bbfdm_type):
             printPARAM(param, dmobject, "\"usp\"")
 
     if has_param:
-        fp = open('./.json_tmp', 'a')
+        fp = open('./.json_tmp', 'a', encoding='utf-8')
 
     print("}", file=fp)
     fp.close()
@@ -832,23 +832,23 @@ def generatejsonfromobj(pobj, pdir):
         chech_each_obj_with_other_obj(model1, model2)
 
     if "tr-181" in sys.argv[1] and pobj.get("name").count(".") == 1:
-        dmfp = open(pdir + "/tr181.json", "a")
+        dmfp = open(pdir + "/tr181.json", "a", encoding='utf-8')
     elif "tr-104" in sys.argv[1] and pobj.get("name").count(".") == 2:
-        dmfp = open(pdir + "/tr104.json", "a")
+        dmfp = open(pdir + "/tr104.json", "a", encoding='utf-8')
     elif "tr-135" in sys.argv[1] and pobj.get("name").count(".") == 2:
-        dmfp = open(pdir + "/tr135.json", "a")
+        dmfp = open(pdir + "/tr135.json", "a", encoding='utf-8')
     elif "tr-106" in sys.argv[1] and pobj.get("name").count(".") == 1:
-        dmfp = open(pdir + "/tr106.json", "a")
+        dmfp = open(pdir + "/tr106.json", "a", encoding='utf-8')
     else:
         dmfp = open(pdir + "/" + (getname(pobj.get('name'))
-                                  ).lower() + ".json", "a")
+                                  ).lower() + ".json", "a", encoding='utf-8')
 
     printclosefile()
     printclosefile()
     updatejsontmpfile()
     removelastline()
 
-    f = open("./.json_tmp", "r")
+    f = open("./.json_tmp", "r", encoding='utf-8')
     obj = json.load(f, object_pairs_hook=OrderedDict)
     dump = json.dumps(obj, indent=4)
     tabs = re.sub('\n +', lambda match: '\n' + '\t' *
diff --git a/tools/generate_dm.py b/tools/generate_dm.py
index 47cc9aef..77635b32 100755
--- a/tools/generate_dm.py
+++ b/tools/generate_dm.py
@@ -37,7 +37,7 @@ VENDOR_LIST = None
 PLUGINS = None
 OUTPUT = None
 
-json_file = open(sys.argv[1], "r")
+json_file = open(sys.argv[1], "r", encoding='utf-8')
 json_data = json.loads(json_file.read())
 
 for option, value in json_data.items():
diff --git a/tools/generate_dm_excel.py b/tools/generate_dm_excel.py
index 2279345f..a37536cd 100755
--- a/tools/generate_dm_excel.py
+++ b/tools/generate_dm_excel.py
@@ -104,7 +104,7 @@ def parse_object_tree(dm_name_list):
         JSON_FILE = bbf.ARRAY_JSON_FILES.get(dm, None)
 
         if JSON_FILE is not None:
-            file = open(JSON_FILE, "r")
+            file = open(JSON_FILE, "r", encoding='utf-8')
             data = json.loads(file.read(), object_pairs_hook=OrderedDict)
 
             for obj, value in data.items():
diff --git a/tools/generate_dm_xml.py b/tools/generate_dm_xml.py
index eb1be9f9..90055bc3 100755
--- a/tools/generate_dm_xml.py
+++ b/tools/generate_dm_xml.py
@@ -79,7 +79,7 @@ def generate_bbf_xml_file(output_file):
             ET.SubElement(syntax, ARRAY_TYPES.get(obj[2], None))
             DM_PARAM_COUNT += 1
 
-    xml_file = open(output_file, "w")
+    xml_file = open(output_file, "w", encoding='utf-8')
     xml_file.write(pretty_format(root))
     xml_file.close()
 
@@ -178,7 +178,7 @@ def generate_hdm_xml_file(output_file):
             param_type.text = str(ARRAY_TYPES.get(obj[2], None))
             DM_PARAM_COUNT += 1
 
-    xml_file = open(output_file, "w")
+    xml_file = open(output_file, "w", encoding='utf-8')
     xml_file.write(pretty_format(root))
     xml_file.close()