diff --git a/src/hw_ostc3.c b/src/hw_ostc3.c
index 0521e2e..58e18ea 100644
--- a/src/hw_ostc3.c
+++ b/src/hw_ostc3.c
@@ -326,15 +326,7 @@ hw_ostc3_transfer (hw_ostc3_device_t *device,
 	}
 
 	if (delay && device->available == 0) {
-		unsigned int count = delay / 100;
-		for (unsigned int i = 0; i < count; ++i) {
-			size_t available = 0;
-			status = dc_iostream_get_available (device->iostream, &available);
-			if (status == DC_STATUS_SUCCESS && available > 0)
-				break;
-
-			dc_iostream_sleep (device->iostream, 100);
-		}
+		dc_iostream_poll (device->iostream, delay);
 	}
 
 	if (cmd != EXIT) {
diff --git a/src/mares_nemo.c b/src/mares_nemo.c
index 7529704..f5e22a3 100644
--- a/src/mares_nemo.c
+++ b/src/mares_nemo.c
@@ -177,13 +177,11 @@ mares_nemo_device_dump (dc_device_t *abstract, dc_buffer_t *buffer)
 	device_event_emit (abstract, DC_EVENT_PROGRESS, &progress);
 
 	// Wait until some data arrives.
-	size_t available = 0;
-	while (dc_iostream_get_available (device->iostream, &available) == DC_STATUS_SUCCESS && available == 0) {
+	while (dc_iostream_poll (device->iostream, 100) == DC_STATUS_TIMEOUT) {
 		if (device_is_cancelled (abstract))
 			return DC_STATUS_CANCELLED;
 
 		device_event_emit (abstract, DC_EVENT_WAITING, NULL);
-		dc_iostream_sleep (device->iostream, 100);
 	}
 
 	// Receive the header of the package.
diff --git a/src/uwatec_memomouse.c b/src/uwatec_memomouse.c
index c77b598..e605578 100644
--- a/src/uwatec_memomouse.c
+++ b/src/uwatec_memomouse.c
@@ -309,14 +309,13 @@ uwatec_memomouse_dump_internal (uwatec_memomouse_device_t *device, dc_buffer_t *
 {
 	dc_status_t status = DC_STATUS_SUCCESS;
 	dc_device_t *abstract = (dc_device_t *) device;
-	size_t available = 0;
 
 	// Enable progress notifications.
 	dc_event_progress_t progress = EVENT_PROGRESS_INITIALIZER;
 	device_event_emit (&device->base, DC_EVENT_PROGRESS, &progress);
 
 	// Waiting for greeting message.
-	while (dc_iostream_get_available (device->iostream, &available) == DC_STATUS_SUCCESS && available == 0) {
+	while (dc_iostream_poll (device->iostream, 300) == DC_STATUS_TIMEOUT) {
 		if (device_is_cancelled (abstract))
 			return DC_STATUS_CANCELLED;
 
@@ -330,8 +329,6 @@ uwatec_memomouse_dump_internal (uwatec_memomouse_device_t *device, dc_buffer_t *
 			ERROR (abstract->context, "Failed to reject the packet.");
 			return status;
 		}
-
-		dc_iostream_sleep (device->iostream, 300);
 	}
 
 	// Read the ID string.
@@ -385,12 +382,11 @@ uwatec_memomouse_dump_internal (uwatec_memomouse_device_t *device, dc_buffer_t *
 	}
 
 	// Wait for the data packet.
-	while (dc_iostream_get_available (device->iostream, &available) == DC_STATUS_SUCCESS && available == 0) {
+	while (dc_iostream_poll (device->iostream, 100) == DC_STATUS_TIMEOUT) {
 		if (device_is_cancelled (abstract))
 			return DC_STATUS_CANCELLED;
 
 		device_event_emit (&device->base, DC_EVENT_WAITING, NULL);
-		dc_iostream_sleep (device->iostream, 100);
 	}
 
 	// Fetch the current system time.