diff --git a/src/core/piinit.cpp b/src/core/piinit.cpp
index 7063eba3..59f15fc6 100644
--- a/src/core/piinit.cpp
+++ b/src/core/piinit.cpp
@@ -85,7 +85,9 @@ void android_thread_exit_handler(int sig) {
 PIInit::PIInit() {
 	PISystemInfo * sinfo = PISystemInfo::instance();
 	sinfo->execDateTime = PIDateTime::current();
-	file_charset = 0;
+	file_charset = new char[1024];
+	memset(file_charset, 0, 1024);
+	strcpy(file_charset, "UTF-8");
 #ifndef ANDROID
 	PISignals::setSlot(__sighandler__);
 	PISignals::grabSignals(PISignals::UserDefined1);
diff --git a/src/io/piiostring.cpp b/src/io/piiostring.cpp
index cda17089..bbea5972 100644
--- a/src/io/piiostring.cpp
+++ b/src/io/piiostring.cpp
@@ -83,7 +83,7 @@ int PIIOString::write(const void * data, int max_size) {
 	if (!canWrite() || !str) return -1;
 	//piCout << "write" << data;
 	if (pos > str->size_s()) pos = str->size_s();
-	PIString rs = PIString((const char *)data);
+	PIString rs = PIString::fromUTF8((const char *)data);
 	if (rs.size_s() > max_size) rs.resize(max_size);
 	str->insert(pos, rs);
 	pos += rs.size_s();
diff --git a/src/io/piserial.h b/src/io/piserial.h
index b3483890..b23add9a 100755
--- a/src/io/piserial.h
+++ b/src/io/piserial.h
@@ -173,9 +173,10 @@ public:
 	//! \returns \b true if sended bytes count = "size"
 	bool send(const void * data, int size, bool wait = false) {return (write(data, size, wait) == size);}
 
-	//! \brief Write to device string "data" and wait for data written if "wait" is \b true.
-	//! \returns \b true if sended bytes count = size of string
-	bool send(const PIString & data, bool wait = false) {return (write(data.data(), data.lengthAscii(), wait) == data.size_s());}
+	/// NOTE: no reason to use this function, use PIString::toUtf8() or PIString::dataAscii(),lengthAscii() instead
+//	//! \brief Write to device string "data" and wait for data written if "wait" is \b true.
+//	//! \returns \b true if sended bytes count = size of string
+//	bool send(const PIString & data, bool wait = false) {return (write(data.data(), data.lengthAscii(), wait) == data.size_s());}
 
 	//! \brief Write to device byte array "data" and wait for data written if "wait" is \b true.
 	//! \returns \b true if sended bytes count = size of string
diff --git a/src/system/piprocess.cpp b/src/system/piprocess.cpp
index 3bac4787..f9e5ed71 100755
--- a/src/system/piprocess.cpp
+++ b/src/system/piprocess.cpp
@@ -88,13 +88,13 @@ int PIProcess::currentPID() {
 
 
 PIStringList PIProcess::currentEnvironment() {
-    PIStringList l;
-    int i = 0;
-    while (environ[i] != 0) {
-        l << environ[i];
-        ++i;
-    }
-    return l;
+	PIStringList l;
+	int i = 0;
+	while (environ[i] != 0) {
+		l << environ[i];
+		++i;
+	}
+	return l;
 }