diff --git a/libs/main/io_devices/piserial.cpp b/libs/main/io_devices/piserial.cpp
index 2a072542..593b04cb 100644
--- a/libs/main/io_devices/piserial.cpp
+++ b/libs/main/io_devices/piserial.cpp
@@ -289,6 +289,29 @@ bool PISerial::isRNG() const {return isBit(TIOCM_RNG, "RNG");}
 bool PISerial::isDSR() const {return isBit(TIOCM_DSR, "DSR");}
 
 
+bool PISerial::setBreak(bool enabled) {
+	if (fd < 0) {
+		piCoutObj << "sendBreak error: \"" << path() << "\" is not opened!";
+		return false;
+	}
+#ifdef WINDOWS
+	if (enabled) {
+		if (!SetCommBreak(PRIVATE->hCom)) return false;
+	} else {
+		if (!ClearCommBreak(PRIVATE->hCom)) return false;
+	}
+#else
+	if (::ioctl(descriptor, enabled ? TIOCSBRK : TIOCCBRK) < 0) {
+		piCoutObj << "setBreak error: " << errorString();
+		return false;
+	} else {
+		return true;
+	}
+#endif
+	return false;
+}
+
+
 bool PISerial::setBit(int bit, bool on, const PIString & bname) {
 	if (fd < 0) {
 		piCoutObj << "setBit" << bname << " error: \"" << path() << "\" is not opened!";
diff --git a/libs/main/io_devices/piserial.h b/libs/main/io_devices/piserial.h
index 136dd103..d8b9a5db 100644
--- a/libs/main/io_devices/piserial.h
+++ b/libs/main/io_devices/piserial.h
@@ -159,6 +159,12 @@ public:
 	bool isRNG() const;
 	bool isDSR() const;
 
+	//! Switch transmission line in break if enabled.
+	//! i.e. sends a continuous stream of zero bits.
+	//! If successful, returns true; otherwise returns false.
+	//! The serial port has to be open before trying to send a break duration; otherwise returns false
+	bool setBreak(bool enabled);
+
 	void setVTime(int t) {vtime = t; applySettings();}
 
 	//! Returns device name