diff --git a/contrib/udev/libdivecomputer.rules b/contrib/udev/libdivecomputer.rules
new file mode 100644
index 0000000..08c234e
--- /dev/null
+++ b/contrib/udev/libdivecomputer.rules
@@ -0,0 +1,17 @@
+# Atomic Aquatics Cobalt
+SUBSYSTEM=="usb", ATTR{idVendor}=="0471", ATTR{idProduct}=="0888", GROUP="plugdev"
+
+# Suunto EON Steel
+SUBSYSTEM=="usb", ATTR{idVendor}=="1493", ATTR{idProduct}=="0030", GROUP="plugdev"
+
+# Suunto EON Core
+SUBSYSTEM=="usb", ATTR{idVendor}=="1493", ATTR{idProduct}=="0033", GROUP="plugdev"
+
+# Scubapro G2
+SUBSYSTEM=="usb", ATTR{idVendor}=="2e6c", ATTR{idProduct}=="3201", GROUP="plugdev"
+
+# Scubapro G2 Console
+SUBSYSTEM=="usb", ATTR{idVendor}=="2e6c", ATTR{idProduct}=="3211", GROUP="plugdev"
+
+# Scubapro Aladin Square
+SUBSYSTEM=="usb", ATTR{idVendor}=="c251", ATTR{idProduct}=="2006", GROUP="plugdev"
diff --git a/src/hw_ostc3.c b/src/hw_ostc3.c
index d018e07..1bdac9c 100644
--- a/src/hw_ostc3.c
+++ b/src/hw_ostc3.c
@@ -212,7 +212,7 @@ hw_ostc3_read (hw_ostc3_device_t *device, dc_event_progress_t *progress, unsigne
 			device->offset += length;
 		} else {
 			// Read the packet.
-			rc = dc_iostream_write (device->iostream, data + nbytes, length, NULL);
+			rc = dc_iostream_read (device->iostream, data + nbytes, length, NULL);
 			if (rc != DC_STATUS_SUCCESS)
 				return rc;
 		}