diff --git a/include/nuttx/fs/ioctl.h b/include/nuttx/fs/ioctl.h
index 5470405cb5e..65bc85b45bd 100644
--- a/include/nuttx/fs/ioctl.h
+++ b/include/nuttx/fs/ioctl.h
@@ -75,7 +75,8 @@
 #define _AJOYBASE       (0x1600) /* Analog joystick ioctl commands */
 #define _PIPEBASE       (0x1700) /* FIFO/pipe ioctl commands */
 #define _RTCBASE        (0x1800) /* RTC ioctl commands */
-#define _BOARDBASE      (0x1900) /* boardctl commands */
+#define _RELAYBASE      (0x1900) /* Relay devices ioctl commands */
+#define _BOARDBASE      (0x1a00) /* boardctl commands */
 
 /* Macros used to manage ioctl commands */
 
@@ -341,6 +342,12 @@
 #define _RTCIOCVALID(c)   (_IOC_TYPE(c)==_RTCBASE)
 #define _RTCIOC(nr)       _IOC(_RTCBASE,nr)
 
+/* Relay driver ioctl definitions *******************************************/
+/* (see nuttx/power/relay.h */
+
+#define _RELAYIOCVALID(c)   (_IOC_TYPE(c)==_RELAYBASE)
+#define _RELAYIOC(nr)       _IOC(_RELAYBASE,nr)
+
 /* boardctl() command definitions *******************************************/
 
 #define _BOARDIOCVALID(c) (_IOC_TYPE(c)==_BOARDBASE)
diff --git a/include/nuttx/power/relay.h b/include/nuttx/power/relay.h
new file mode 100644
index 00000000000..b1c32028b6c
--- /dev/null
+++ b/include/nuttx/power/relay.h
@@ -0,0 +1,65 @@
+/****************************************************************************
+ * include/nuttx/power/relay.h
+ * NuttX Relay Interfaces
+ *
+ *   Copyright (C) 2015 Max Nekludov. All rights reserved.
+ *   Author: Max Nekludov <macscomp@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __CONFIGS_NUTTX_INCLUDE_RELAY_H
+#define __CONFIGS_NUTTX_INCLUDE_RELAY_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+#include <nuttx/fs/ioctl.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+/* IOCTL Commands ***********************************************************/
+
+#define RELAYIOC_CTRL   _RELAYIOC(0x0001) /* Relay control
+                                           * IN: unsigned long integer
+                                           *     0=open
+                                           *     1=close
+                                           * OUT: None */
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+#endif  /* __CONFIGS_NUTTX_INCLUDE_RELAY_H */