Significantly increase all MacOS timing delays for device communication

Co-authored-by: jyong15 <[email protected]>

Author: Copilot

ShimmerDriver/src/main/java/com/shimmerresearch/bluetooth/ShimmerRadioInitializer.java

@@ -57,8 +57,8 @@ protected int readHardwareVersion() throws ShimmerException, InterruptedExceptio
 
 		serialCommPort.txBytes(instruction);
 		if(mUseLegacyDelayToDelayForResponse) {
-			System.out.println("ShimmerRadioInitializer: Applying command-response delay (200ms)");
-			Thread.sleep(200);
+			System.out.println("ShimmerRadioInitializer: Applying command-response delay (500ms)");
+			Thread.sleep(500);  // Increased from 200ms to 500ms for MacOS
 		} else {
 			System.out.println("ShimmerRadioInitializer: No command-response delay (flag is false)");
 		}
@@ -78,7 +78,7 @@ protected byte[] readFirmwareVersion() throws ShimmerException, InterruptedExcep
 		serialCommPort.txBytes(instruction);
 		byte[] bufferInquiry = new byte[6]; 
 		if(mUseLegacyDelayToDelayForResponse)
-			Thread.sleep(200);
+			Thread.sleep(500);  // Increased from 200ms to 500ms for MacOS
 		serialCommPort.rxBytes(1);
 		serialCommPort.rxBytes(1);
 		bufferInquiry = serialCommPort.rxBytes(6);
@@ -106,7 +106,7 @@ public ExpansionBoardDetails readExpansionBoardID() {
 
 				serialCommPort.txBytes(instruction);
 				if(mUseLegacyDelayToDelayForResponse)
-					Thread.sleep(200);
+					Thread.sleep(500);  // Increased from 200ms to 500ms for MacOS
 				byte[] response = serialCommPort.rxBytes(3+1);
 
 				if(response!=null){

ShimmerDriverPC/src/main/java/com/shimmerresearch/pcSerialPort/SerialPortCommJssc.java

@@ -33,7 +33,7 @@ public class SerialPortCommJssc extends AbstractSerialPortHal implements SerialP
 	private boolean setDtrOnConnect = false;
 
 	/** MacOS serial ports require initialization time after opening */
-	private static final int MACOS_PORT_INIT_DELAY_MS = 100;
+	private static final int MACOS_PORT_INIT_DELAY_MS = 500;  // Increased from 100ms to 500ms
 
 	private transient ShimmerUartListener mShimmerUartListener;
 	private boolean mIsSerialPortReaderStarted = false;
@@ -119,12 +119,16 @@ public void connect() throws ShimmerException {
             		mSerialPort.setRTS(true);
             		mSerialPort.setDTR(true);
             		consolePrintLn("MacOS: Explicitly set RTS=true and DTR=true");
+            		// Give signals time to stabilize before continuing
+            		Thread.sleep(50);
             	} catch (SerialPortException e) {
             		consolePrintLn("MacOS: Warning - failed to set DTR/RTS: " + e.getMessage());
+            	} catch (InterruptedException e) {
+            		Thread.currentThread().interrupt();
             	}
             }
 
-            // On MacOS, serial ports need a brief settling time after opening
+            // On MacOS, serial ports need a longer settling time after opening
             if(UtilShimmer.isOsMac()) {
             	try {
             		Thread.sleep(MACOS_PORT_INIT_DELAY_MS);