update

android/src/main/java/com/melihyarikkaya/rnserialport/RNSerialportModule.java

@@ -206,10 +206,12 @@ public class RNSerialportModule extends ReactContextBaseJavaModule {
   @ReactMethod
   public void setRTS(int FLOW_CONTROL_RTS_CTS) {
     this.FLOW_CONTROL_RTS_CTS = FLOW_CONTROL_RTS_CTS;
+    serialPort.setRTS(FLOW_CONTROL_RTS_CTS);
   }
   @ReactMethod
-  public void setDTR(int FLOW_CONTROL_RTS_CTS) {
+  public void setDTR(int FLOW_CONTROL_DSR_DTR) {
     this.FLOW_CONTROL_DSR_DTR = FLOW_CONTROL_DSR_DTR;
+    serialPort.setDTR(FLOW_CONTROL_DSR_DTR);
   }
 
   @ReactMethod