Fixed connection problem with GRBL_ESP32 in wifi mode (#2583)

It requires a small pause between querying the status and fetching the build information.

ugs-core/src/com/willwinder/universalgcodesender/GrblControllerInitializer.java

@@ -6,14 +6,13 @@
 import com.willwinder.universalgcodesender.firmware.grbl.commands.GetSettingsCommand;
 import com.willwinder.universalgcodesender.listeners.ControllerState;
 import com.willwinder.universalgcodesender.listeners.MessageType;
+import static com.willwinder.universalgcodesender.utils.ControllerUtils.sendAndWaitForCompletion;
 
 import java.util.Optional;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import static com.willwinder.universalgcodesender.utils.ControllerUtils.sendAndWaitForCompletion;
-
 /**
  * A class that implements an initialization protocol for GRBL and keeps an internal state of the
  * connection process. The query process will not require the controller to be reset which is needed
@@ -50,6 +49,7 @@ public boolean initialize() throws ControllerException{
         controller.setControllerState(ControllerState.CONNECTING);
         isInitializing.set(true);
         try {
+            // Some controllers need this wait before we can query its status
             Thread.sleep(2000);
             if (!GrblUtils.isControllerResponsive(controller)) {
                 isInitializing.set(false);
@@ -58,6 +58,8 @@ public boolean initialize() throws ControllerException{
                 return false;
             }
 
+            // Some controllers need this wait before we can query the rest of its information
+            Thread.sleep(2000);
             fetchControllerVersion();
             fetchControllerState();
 
@@ -110,6 +112,10 @@ public boolean isInitialized() {
         return isInitialized.get();
     }
 
+    public boolean isInitializing() {
+        return isInitializing.get();
+    }
+
     public GrblVersion getVersion() {
         return version;
     }

ugs-core/test/com/willwinder/universalgcodesender/GrblControllerTest.java

@@ -1392,7 +1392,6 @@ private GrblController initializeAndConnectController(String grblVersionString)
         instance.openCommPort(getSettings().getConnectionDriver(), "/dev/port", 1234);
         Thread.sleep(50);
 
-        instance.rawResponseHandler(grblVersionString);
         return instance;
     }
 }