diff --git a/client/Makefile b/client/Makefile
index 5894ca8..29dd094 100644
--- a/client/Makefile
+++ b/client/Makefile
@@ -22,7 +22,7 @@ EXE_SUFFIX =
 #USBLIBS = -L/usr/local/lib -lusb
 #EXE_SUFFIX = .exe
 
-NAME = set-led
+NAME = test
 
 OBJECTS = opendevice.o $(NAME).o
 
diff --git a/client/set-led b/client/set-led
deleted file mode 100644
index ec84011..0000000
Binary files a/client/set-led and /dev/null differ
diff --git a/client/set-led.c b/client/test.c
similarity index 50%
rename from client/set-led.c
rename to client/test.c
index 52b2a3b..e94047c 100644
--- a/client/set-led.c
+++ b/client/test.c
@@ -27,30 +27,16 @@ respectively.
 #include "../firmware/requests.h"   /* custom request numbers */
 #include "../firmware/usbconfig.h"  /* device's VID/PID and names */
 
-static void usage(char *name)
-{
-    fprintf(stderr, "usage:\n");
-    fprintf(stderr, "  %s on ....... turn on LED\n", name);
-    fprintf(stderr, "  %s off ...... turn off LED\n", name);
-    fprintf(stderr, "  %s status ... ask current status of LED\n", name);
-#if ENABLE_TEST
-    fprintf(stderr, "  %s test ..... run driver reliability test\n", name);
-#endif /* ENABLE_TEST */
-}
-
 int main(int argc, char **argv)
 {
 usb_dev_handle      *handle = NULL;
 const unsigned char rawVid[2] = {USB_CFG_VENDOR_ID}, rawPid[2] = {USB_CFG_DEVICE_ID};
 char                vendor[] = {USB_CFG_VENDOR_NAME, 0}, product[] = {USB_CFG_DEVICE_NAME, 0};
 char                buffer[4];
-int                 cnt, vid, pid, isOn;
+int                 cnt, vid, pid;
 
     usb_init();
-    if(argc < 2){   /* we need at least one argument */
-        usage(argv[0]);
-        exit(1);
-    }
+
     /* compute VID/PID from usbconfig.h so that there is a central source of information */
     vid = rawVid[1] * 256 + rawVid[0];
     pid = rawPid[1] * 256 + rawPid[0];
@@ -81,55 +67,44 @@ int                 cnt, vid, pid, isOn;
     }
 #endif
 
-    if(strcasecmp(argv[1], "status") == 0){
-        cnt = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, CUSTOM_RQ_GET_STATUS, 0, 0, buffer, sizeof(buffer), 5000);
-        if(cnt < 1){
-            if(cnt < 0){
-                fprintf(stderr, "USB error: %s\n", usb_strerror());
-            }else{
-                fprintf(stderr, "only %d bytes received.\n", cnt);
-            }
-        }else{
-            printf("LED is %s\n", buffer[0] ? "on" : "off");
-        }
-    }else if((isOn = (strcasecmp(argv[1], "on") == 0)) || strcasecmp(argv[1], "off") == 0){
-        cnt = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_OUT, CUSTOM_RQ_SET_STATUS, isOn, 0, buffer, 0, 5000);
-        if(cnt < 0){
-            fprintf(stderr, "USB error: %s\n", usb_strerror());
-        }
-#if ENABLE_TEST
-    }else if(strcasecmp(argv[1], "test") == 0){
-        int i;
-        srandomdev();
-        for(i = 0; i < 50000; i++){
-            int value = random() & 0xffff, index = random() & 0xffff;
-            int rxValue, rxIndex;
-            if((i+1) % 100 == 0){
-                fprintf(stderr, "\r%05d", i+1);
-                fflush(stderr);
-            }
-            cnt = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, CUSTOM_RQ_ECHO, value, index, buffer, sizeof(buffer), 5000);
-            if(cnt < 0){
-                fprintf(stderr, "\nUSB error in iteration %d: %s\n", i, usb_strerror());
-                break;
-            }else if(cnt != 4){
-                fprintf(stderr, "\nerror in iteration %d: %d bytes received instead of 4\n", i, cnt);
-                break;
-            }
-            rxValue = ((int)buffer[0] & 0xff) | (((int)buffer[1] & 0xff) << 8);
-            rxIndex = ((int)buffer[2] & 0xff) | (((int)buffer[3] & 0xff) << 8);
-            if(rxValue != value || rxIndex != index){
-                fprintf(stderr, "\ndata error in iteration %d:\n", i);
-                fprintf(stderr, "rxValue = 0x%04x value = 0x%04x\n", rxValue, value);
-                fprintf(stderr, "rxIndex = 0x%04x index = 0x%04x\n", rxIndex, index);
-            }
-        }
-        fprintf(stderr, "\nTest completed.\n");
-#endif /* ENABLE_TEST */
-    }else{
-        usage(argv[0]);
-        exit(1);
-    }
+    int i,x,y,z,onoff = 0;
+    while (1)
+    {
+        onoff = (onoff == 0) ? 1 : 0;
+        for (x = 0; x <3; x++)
+            for (y = 0; y <3; y++)
+                for (z = 0; z <3; z++)
+                {
+                    for (i = 0; i < 4; i++)
+                    {
+                        int v = 0;
+                        if (i == 0)
+                            v = x;
+                        if (i == 1)
+                            v = y;
+                        if (i == 2)
+                            v = z;
+                        if (i == 3)
+                            v = onoff;
+                        cnt = -1;
+                        do {
+                            sleep(1);
+                            cnt = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_OUT, CUSTOM_RQ_SET_STATUS, v, 0, buffer, 0, 5000);
+                            if (cnt < 0)
+                            {
+                                if(usbOpenDevice(&handle, vid, vendor, pid, product, NULL, NULL, NULL) != 0){
+                                    fprintf(stderr, "Could not find USB device \"%s\" with vid=0x%x pid=0x%x\n", product, vid, pid);
+                                    exit(1);
+                                }
+                            }
+                        } while (cnt < 0);
+
+                    }
+
+                    fprintf(stdout, "%d %d %d %d\n",x,y,z,onoff);
+                }
+     }
+
     usb_close(handle);
     return 0;
 }