diff --git a/core/src/main/java/me/retrodaredevil/io/serial/ImmutableSerialConfig.java b/core/src/main/java/me/retrodaredevil/io/serial/ImmutableSerialConfig.java
index 5142292..4487676 100644
--- a/core/src/main/java/me/retrodaredevil/io/serial/ImmutableSerialConfig.java
+++ b/core/src/main/java/me/retrodaredevil/io/serial/ImmutableSerialConfig.java
@@ -1,49 +1,55 @@
 package me.retrodaredevil.io.serial;
 
 public final class ImmutableSerialConfig implements SerialConfig {
-	
+
 	private final int baudRate;
 	private final int dataBits;
 	private final StopBits stopBits;
 	private final Parity parity;
-	private final boolean rts, dtr;
-	
-	public ImmutableSerialConfig(int baudRate, int dataBits, StopBits stopBits, Parity parity, boolean rts, boolean dtr) {
+	private final boolean rts, dtr, rs485;
+
+	public ImmutableSerialConfig(int baudRate, int dataBits, StopBits stopBits, Parity parity, boolean rts, boolean dtr, boolean rs485) {
 		this.baudRate = baudRate;
 		this.dataBits = dataBits;
 		this.stopBits = stopBits;
 		this.parity = parity;
 		this.rts = rts;
 		this.dtr = dtr;
+		this.rs485 = rs485;
 	}
-	
+
 	@Override
 	public int getBaudRateValue() {
 		return baudRate;
 	}
-	
+
 	@Override
 	public Parity getParity() {
 		return parity;
 	}
-	
+
 	@Override
 	public int getDataBitsValue() {
 		return dataBits;
 	}
-	
+
 	@Override
 	public StopBits getStopBits() {
 		return stopBits;
 	}
-	
+
 	@Override
 	public boolean isRTS() {
 		return rts;
 	}
-	
+
 	@Override
 	public boolean isDTR() {
 		return dtr;
 	}
+
+	@Override
+	public boolean isRS485() {
+		return rs485;
+	}
 }
diff --git a/core/src/main/java/me/retrodaredevil/io/serial/SerialConfig.java b/core/src/main/java/me/retrodaredevil/io/serial/SerialConfig.java
index 2722aca..a3f06a6 100644
--- a/core/src/main/java/me/retrodaredevil/io/serial/SerialConfig.java
+++ b/core/src/main/java/me/retrodaredevil/io/serial/SerialConfig.java
@@ -7,9 +7,10 @@ public interface SerialConfig {
 	StopBits getStopBits();
 	boolean isRTS();
 	boolean isDTR();
-	
+	boolean isRS485();
+
 	// TODO implement flow control
-	
+
 	enum Baud {
 		B1200(1200), B2400(2400), B4800(4800), B9600(9600), B19200(19200),
 		B38400(38400), B56000(56000), B115200(115200), B128000(128000), B256000(256000)
diff --git a/core/src/main/java/me/retrodaredevil/io/serial/SerialConfigBuilder.java b/core/src/main/java/me/retrodaredevil/io/serial/SerialConfigBuilder.java
index 2f98ac4..d1831c6 100644
--- a/core/src/main/java/me/retrodaredevil/io/serial/SerialConfigBuilder.java
+++ b/core/src/main/java/me/retrodaredevil/io/serial/SerialConfigBuilder.java
@@ -3,13 +3,13 @@
 import static java.util.Objects.requireNonNull;
 
 public class SerialConfigBuilder implements SerialConfig {
-	
+
 	private int baudRate;
 	private int dataBits = 8;
 	private StopBits stopBits = StopBits.ONE;
 	private Parity parity = Parity.NONE;
-	private boolean rts = false, dtr = false;
-	
+	private boolean rts = false, dtr = false, rs485 = false;
+
 	public SerialConfigBuilder(SerialConfig serialConfig){
 		baudRate = serialConfig.getBaudRateValue();
 		dataBits = serialConfig.getDataBitsValue();
@@ -21,9 +21,9 @@ public SerialConfigBuilder(SerialConfig serialConfig){
 	public SerialConfigBuilder(int baudRate){
 		this.baudRate = baudRate;
 	}
-	
+
 	public SerialConfig build(){
-		return new ImmutableSerialConfig(baudRate, dataBits, stopBits, parity, rts, dtr);
+		return new ImmutableSerialConfig(baudRate, dataBits, stopBits, parity, rts, dtr, rs485);
 	}
 	@Override
 	public int getBaudRateValue() {
@@ -69,7 +69,7 @@ public SerialConfigBuilder setRTS(boolean b){
 		this.rts = b;
 		return this;
 	}
-	
+
 	@Override
 	public boolean isDTR() {
 		return dtr;
@@ -78,4 +78,13 @@ public SerialConfigBuilder setDTR(boolean b){
 		this.dtr = b;
 		return this;
 	}
+
+	@Override
+	public boolean isRS485() {
+		return rs485;
+	}
+	public SerialConfigBuilder setRS485(boolean isRS485) {
+		this.rs485 = isRS485;
+		return this;
+	}
 }
diff --git a/jSerialComm/src/main/java/me/retrodaredevil/io/serial/JSerialIOBundle.java b/jSerialComm/src/main/java/me/retrodaredevil/io/serial/JSerialIOBundle.java
index f4ff42c..14939ff 100644
--- a/jSerialComm/src/main/java/me/retrodaredevil/io/serial/JSerialIOBundle.java
+++ b/jSerialComm/src/main/java/me/retrodaredevil/io/serial/JSerialIOBundle.java
@@ -48,6 +48,10 @@ public JSerialIOBundle(SerialPort serialPort, SerialConfig serialConfig, Config
 		} else {
 			serialPort.clearDTR();
 		}
+		if (serialConfig.isRS485()) {
+			// note that it is necessary to call this after calling setComPortParameters
+			serialPort.setRs485ModeParameters(true, true, 10, 10);
+		}
 		inputStream = requireNonNull(serialPort.getInputStream());
 		outputStream = requireNonNull(serialPort.getOutputStream());
 	}
diff --git a/purejavacomm/src/main/java/me/retrodaredevil/io/serial/PureJavaCommIOBundle.java b/purejavacomm/src/main/java/me/retrodaredevil/io/serial/PureJavaCommIOBundle.java
index f497482..0c07534 100644
--- a/purejavacomm/src/main/java/me/retrodaredevil/io/serial/PureJavaCommIOBundle.java
+++ b/purejavacomm/src/main/java/me/retrodaredevil/io/serial/PureJavaCommIOBundle.java
@@ -45,8 +45,11 @@ public static PureJavaCommIOBundle create(String port, SerialConfig serialConfig
 			if (serialConfig.isDTR()) {
 				serialPort.setDTR(true);
 			}
+			if (serialConfig.isRS485()) {
+				throw new PureJavaIllegalStateException("RS485 not supported");
+			}
 		} catch (PureJavaIllegalStateException e) {
-			throw new SerialPortException("It's likely that RTS or DTR is not supported", e);
+			throw new SerialPortException("It's likely that RTS or DTR or RS485 is not supported", e);
 		}
 		try {
 			return new PureJavaCommIOBundle(serialPort);