diff --git a/commhandler.cpp b/commhandler.cpp
index 7a48d87..165c90e 100644
--- a/commhandler.cpp
+++ b/commhandler.cpp
@@ -45,6 +45,7 @@ commHandler::commHandler(QString portName, quint32 baudRate)
     baudrate = baudRate;
     stopbits = 1;
     this->portName = portName;
+    this->PTTviaRTS = false;
 
     setupComm(); // basic parameters
     openPort();
@@ -162,6 +163,25 @@ void commHandler::receiveDataIn()
     }
 }
 
+void commHandler::setRTS(bool rtsOn)
+{
+    bool success = port->setRequestToSend(rtsOn);
+    if(!success)
+    {
+        qInfo(logSerial()) << "Error, could not set RTS on port " << portName;
+    }
+}
+
+bool commHandler::rtsStatus()
+{
+    return port->isRequestToSend();
+}
+
+void commHandler::setUseRTSforPTT(bool PTTviaRTS)
+{
+    this->PTTviaRTS = PTTviaRTS;
+}
+
 void commHandler::openPort()
 {
     bool success;
diff --git a/commhandler.h b/commhandler.h
index e7e5580..c76e23f 100644
--- a/commhandler.h
+++ b/commhandler.h
@@ -18,9 +18,14 @@ public:
     commHandler();
     commHandler(QString portName, quint32 baudRate);
     bool serialError;
+    bool rtsStatus();
 
     ~commHandler();
 
+public slots:
+    void setUseRTSforPTT(bool useRTS);
+    void setRTS(bool rtsOn);
+
 private slots:
     void receiveDataIn(); // from physical port
     void receiveDataFromUserToRig(const QByteArray &data);
@@ -38,6 +43,7 @@ private:
     void openPort();
     void closePort();
 
+
     void sendDataOut(const QByteArray &writeData); // out to radio
     void debugMe();
     void hexPrint();
@@ -63,6 +69,8 @@ private:
     bool havePt;
     QString ptDevSlave;
 
+    bool PTTviaRTS = false;
+
     bool isConnected; // port opened
     mutable QMutex mutex;
     void printHex(const QByteArray &pdata, bool printVert, bool printHoriz);
diff --git a/rigcommander.cpp b/rigcommander.cpp
index c6e72e0..b57e285 100644
--- a/rigcommander.cpp
+++ b/rigcommander.cpp
@@ -63,6 +63,7 @@ void rigCommander::commSetup(unsigned char rigCivAddr, QString rigSerialPort, qu
     connect(ptty, SIGNAL(haveDataFromPort(QByteArray)), comm, SLOT(receiveDataFromUserToRig(QByteArray)));
     // data from the program to the comm port:
     connect(this, SIGNAL(dataForComm(QByteArray)), comm, SLOT(receiveDataFromUserToRig(QByteArray)));
+    connect(this, SIGNAL(toggleRTS(bool)), comm, SLOT(setRTS(bool)));
 
     // data from the rig to the ptty:
     connect(comm, SIGNAL(haveDataFromPort(QByteArray)), ptty, SLOT(receiveDataFromRigToPtty(QByteArray)));
@@ -992,9 +993,14 @@ void rigCommander::getSatelliteMode()
 
 void rigCommander::getPTT()
 {
-    QByteArray payload;
-    payload.setRawData("\x1C\x00", 2);
-    prepDataAndSend(payload);
+    if(rigCaps.useRTSforPTT)
+    {
+        emit havePTTStatus(comm->rtsStatus());
+    } else {
+        QByteArray payload;
+        payload.setRawData("\x1C\x00", 2);
+        prepDataAndSend(payload);
+    }
 }
 
 void rigCommander::getBandStackReg(char band, char regCode)
@@ -1011,9 +1017,14 @@ void rigCommander::setPTT(bool pttOn)
 
     if(pttAllowed)
     {
-        QByteArray payload("\x1C\x00", 2);
-        payload.append((char)pttOn);
-        prepDataAndSend(payload);
+        if(rigCaps.useRTSforPTT)
+        {
+            emit toggleRTS(pttOn);
+        } else {
+            QByteArray payload("\x1C\x00", 2);
+            payload.append((char)pttOn);
+            prepDataAndSend(payload);
+        }
         rigState.ptt = pttOn;
     }
 }
@@ -2908,6 +2919,7 @@ void rigCommander::determineRigCaps()
 
     rigCaps.hasTransmit = true;
     rigCaps.hasPTTCommand = true;
+    rigCaps.useRTSforPTT = false;
 
     // Common, reasonable defaults for most supported HF rigs:
     rigCaps.bsr[band160m] = 0x01;
@@ -3321,6 +3333,7 @@ void rigCommander::determineRigCaps()
             rigCaps.hasFDcomms = false;
             rigCaps.hasATU = true;
             rigCaps.hasPTTCommand = false;
+            rigCaps.useRTSforPTT = true;
             rigCaps.hasDataModes = false;
             rigCaps.attenuators.push_back('\x20');
             rigCaps.bands = standardHF;
@@ -3341,6 +3354,7 @@ void rigCommander::determineRigCaps()
             rigCaps.hasFDcomms = false;
             rigCaps.hasATU = false;
             rigCaps.hasPTTCommand = false;
+            rigCaps.useRTSforPTT = true;
             rigCaps.hasIFShift = true;
             rigCaps.hasDataModes = false;
             rigCaps.attenuators.push_back('\x20');
@@ -3366,6 +3380,7 @@ void rigCommander::determineRigCaps()
             rigCaps.hasFDcomms = false;
             rigCaps.hasATU = false;
             rigCaps.hasPTTCommand = false;
+            rigCaps.useRTSforPTT = true;
             rigCaps.hasDataModes = false;
             rigCaps.hasIFShift = true; // untested
             rigCaps.attenuators.push_back('\x20');
diff --git a/rigcommander.h b/rigcommander.h
index 1abc38f..bf02aad 100644
--- a/rigcommander.h
+++ b/rigcommander.h
@@ -322,6 +322,7 @@ signals:
     void haveSerialPortError(const QString port, const QString errorText);
     void haveStatusUpdate(const QString text);
     void dataForComm(const QByteArray &outData);
+    void toggleRTS(bool rtsOn);
 
     // UDP:
     void haveChangeLatency(quint16 value);
diff --git a/rigidentities.h b/rigidentities.h
index a87d9ec..cae1b75 100644
--- a/rigidentities.h
+++ b/rigidentities.h
@@ -118,6 +118,7 @@ struct rigCapabilities {
 
     bool hasTransmit;
     bool hasPTTCommand;
+    bool useRTSforPTT;
     bool hasAttenuator;
     bool hasPreamp;
     bool hasAntennaSel;