diff --git a/ROMFS/px4fmu_common/init.d/rc.interface b/ROMFS/px4fmu_common/init.d/rc.interface
index a1ea2abb0c..4568e19c38 100644
--- a/ROMFS/px4fmu_common/init.d/rc.interface
+++ b/ROMFS/px4fmu_common/init.d/rc.interface
@@ -433,9 +433,9 @@ then
 		fi
 
 		# Set disarmed, min and max PWM values.
-		if [ $PWM_EXTRA_DISARMED != none ]
+		if [ $PWM_EXTRA_DISARM != none ]
 		then
-			pwm disarmed -c ${PWM_EXTRA_OUT} -p ${PWM_EXTRA_DISARMED}
+			pwm disarmed -c ${PWM_EXTRA_OUT} -p ${PWM_EXTRA_DISARM}
 		fi
 		if [ $PWM_EXTRA_MIN != none ]
 		then
@@ -450,38 +450,38 @@ then
 	#
 	# Per channel disarmed settings.
 	#
-	pwm disarmed -c 1 -p p:PWM_AUX_DIS1 -d ${OUTPUT_EXTRA_DEV}
-	pwm disarmed -c 2 -p p:PWM_AUX_DIS2 -d ${OUTPUT_EXTRA_DEV}
-	pwm disarmed -c 3 -p p:PWM_AUX_DIS3 -d ${OUTPUT_EXTRA_DEV}
-	pwm disarmed -c 4 -p p:PWM_AUX_DIS3 -d ${OUTPUT_EXTRA_DEV}
-	pwm disarmed -c 5 -p p:PWM_AUX_DIS5 -d ${OUTPUT_EXTRA_DEV}
-	pwm disarmed -c 6 -p p:PWM_AUX_DIS3 -d ${OUTPUT_EXTRA_DEV}
-	pwm disarmed -c 7 -p p:PWM_AUX_DIS7 -d ${OUTPUT_EXTRA_DEV}
-	pwm disarmed -c 8 -p p:PWM_AUX_DIS8 -d ${OUTPUT_EXTRA_DEV}
+	pwm disarmed -c 1 -p p:PWM_EXTRA_DIS1 -d ${OUTPUT_EXTRA_DEV}
+	pwm disarmed -c 2 -p p:PWM_EXTRA_DIS2 -d ${OUTPUT_EXTRA_DEV}
+	pwm disarmed -c 3 -p p:PWM_EXTRA_DIS3 -d ${OUTPUT_EXTRA_DEV}
+	pwm disarmed -c 4 -p p:PWM_EXTRA_DIS3 -d ${OUTPUT_EXTRA_DEV}
+	pwm disarmed -c 5 -p p:PWM_EXTRA_DIS5 -d ${OUTPUT_EXTRA_DEV}
+	pwm disarmed -c 6 -p p:PWM_EXTRA_DIS3 -d ${OUTPUT_EXTRA_DEV}
+	pwm disarmed -c 7 -p p:PWM_EXTRA_DIS7 -d ${OUTPUT_EXTRA_DEV}
+	pwm disarmed -c 8 -p p:PWM_EXTRA_DIS8 -d ${OUTPUT_EXTRA_DEV}
 
 	#
 	# Per channel min settings.
 	#
-	pwm min -c 1 -p p:PWM_AUX_MIN1 -d ${OUTPUT_EXTRA_DEV}
-	pwm min -c 2 -p p:PWM_AUX_MIN2 -d ${OUTPUT_EXTRA_DEV}
-	pwm min -c 3 -p p:PWM_AUX_MIN3 -d ${OUTPUT_EXTRA_DEV}
-	pwm min -c 4 -p p:PWM_AUX_MIN4 -d ${OUTPUT_EXTRA_DEV}
-	pwm min -c 5 -p p:PWM_AUX_MIN5 -d ${OUTPUT_EXTRA_DEV}
-	pwm min -c 6 -p p:PWM_AUX_MIN6 -d ${OUTPUT_EXTRA_DEV}
-	pwm min -c 7 -p p:PWM_AUX_MIN7 -d ${OUTPUT_EXTRA_DEV}
-	pwm min -c 8 -p p:PWM_AUX_MIN8 -d ${OUTPUT_EXTRA_DEV}
+	pwm min -c 1 -p p:PWM_EXTRA_MIN1 -d ${OUTPUT_EXTRA_DEV}
+	pwm min -c 2 -p p:PWM_EXTRA_MIN2 -d ${OUTPUT_EXTRA_DEV}
+	pwm min -c 3 -p p:PWM_EXTRA_MIN3 -d ${OUTPUT_EXTRA_DEV}
+	pwm min -c 4 -p p:PWM_EXTRA_MIN4 -d ${OUTPUT_EXTRA_DEV}
+	pwm min -c 5 -p p:PWM_EXTRA_MIN5 -d ${OUTPUT_EXTRA_DEV}
+	pwm min -c 6 -p p:PWM_EXTRA_MIN6 -d ${OUTPUT_EXTRA_DEV}
+	pwm min -c 7 -p p:PWM_EXTRA_MIN7 -d ${OUTPUT_EXTRA_DEV}
+	pwm min -c 8 -p p:PWM_EXTRA_MIN8 -d ${OUTPUT_EXTRA_DEV}
 
 	#
 	# Per channel max settings.
 	#
-	pwm max -c 1 -p p:PWM_AUX_MAX1 -d ${OUTPUT_EXTRA_DEV}
-	pwm max -c 2 -p p:PWM_AUX_MAX2 -d ${OUTPUT_EXTRA_DEV}
-	pwm max -c 3 -p p:PWM_AUX_MAX3 -d ${OUTPUT_EXTRA_DEV}
-	pwm max -c 4 -p p:PWM_AUX_MAX4 -d ${OUTPUT_EXTRA_DEV}
-	pwm max -c 5 -p p:PWM_AUX_MAX5 -d ${OUTPUT_EXTRA_DEV}
-	pwm max -c 6 -p p:PWM_AUX_MAX6 -d ${OUTPUT_EXTRA_DEV}
-	pwm max -c 7 -p p:PWM_AUX_MAX7 -d ${OUTPUT_EXTRA_DEV}
-	pwm max -c 8 -p p:PWM_AUX_MAX8 -d ${OUTPUT_EXTRA_DEV}
+	pwm max -c 1 -p p:PWM_EXTRA_MAX1 -d ${OUTPUT_EXTRA_DEV}
+	pwm max -c 2 -p p:PWM_EXTRA_MAX2 -d ${OUTPUT_EXTRA_DEV}
+	pwm max -c 3 -p p:PWM_EXTRA_MAX3 -d ${OUTPUT_EXTRA_DEV}
+	pwm max -c 4 -p p:PWM_EXTRA_MAX4 -d ${OUTPUT_EXTRA_DEV}
+	pwm max -c 5 -p p:PWM_EXTRA_MAX5 -d ${OUTPUT_EXTRA_DEV}
+	pwm max -c 6 -p p:PWM_EXTRA_MAX6 -d ${OUTPUT_EXTRA_DEV}
+	pwm max -c 7 -p p:PWM_EXTRA_MAX7 -d ${OUTPUT_EXTRA_DEV}
+	pwm max -c 8 -p p:PWM_EXTRA_MAX8 -d ${OUTPUT_EXTRA_DEV}
 
 	if [ $FAILSAFE_EXTRA != none ]
 	then
@@ -491,14 +491,14 @@ then
 	#
 	# Per channel failsafe settings.
 	#
-	pwm failsafe -c 1 -p p:PWM_AUX_FAIL1 -d ${OUTPUT_EXTRA_DEV}
-	pwm failsafe -c 2 -p p:PWM_AUX_FAIL2 -d ${OUTPUT_EXTRA_DEV}
-	pwm failsafe -c 3 -p p:PWM_AUX_FAIL3 -d ${OUTPUT_EXTRA_DEV}
-	pwm failsafe -c 4 -p p:PWM_AUX_FAIL4 -d ${OUTPUT_EXTRA_DEV}
-	pwm failsafe -c 5 -p p:PWM_AUX_FAIL5 -d ${OUTPUT_EXTRA_DEV}
-	pwm failsafe -c 6 -p p:PWM_AUX_FAIL6 -d ${OUTPUT_EXTRA_DEV}
-	pwm failsafe -c 7 -p p:PWM_AUX_FAIL7 -d ${OUTPUT_EXTRA_DEV}
-	pwm failsafe -c 8 -p p:PWM_AUX_FAIL8 -d ${OUTPUT_EXTRA_DEV}
+	pwm failsafe -c 1 -p p:PWM_EXTRA_FAIL1 -d ${OUTPUT_EXTRA_DEV}
+	pwm failsafe -c 2 -p p:PWM_EXTRA_FAIL2 -d ${OUTPUT_EXTRA_DEV}
+	pwm failsafe -c 3 -p p:PWM_EXTRA_FAIL3 -d ${OUTPUT_EXTRA_DEV}
+	pwm failsafe -c 4 -p p:PWM_EXTRA_FAIL4 -d ${OUTPUT_EXTRA_DEV}
+	pwm failsafe -c 5 -p p:PWM_EXTRA_FAIL5 -d ${OUTPUT_EXTRA_DEV}
+	pwm failsafe -c 6 -p p:PWM_EXTRA_FAIL6 -d ${OUTPUT_EXTRA_DEV}
+	pwm failsafe -c 7 -p p:PWM_EXTRA_FAIL7 -d ${OUTPUT_EXTRA_DEV}
+	pwm failsafe -c 8 -p p:PWM_EXTRA_FAIL8 -d ${OUTPUT_EXTRA_DEV}
 
 fi
 
diff --git a/src/modules/sensors/pwm_params_extra.c b/src/modules/sensors/pwm_params_extra.c
new file mode 100644
index 0000000000..b62cab207c
--- /dev/null
+++ b/src/modules/sensors/pwm_params_extra.c
@@ -0,0 +1,801 @@
+/****************************************************************************
+ *
+ *   Copyright (c) 2012-2016 PX4 Development Team. All rights reserved.
+ *
+ * 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 PX4 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.
+ *
+ ****************************************************************************/
+
+/**
+ * @file pwm_params_extra.c
+ *
+ * Parameters defined for PWM output.
+ *
+ */
+
+/******************************************************************************
+*                                PWM_EXTRA_RATE                                 *
+******************************************************************************/
+
+/**
+ * Set the PWM output frequency for the extra outputs
+ *
+ * Set to 400 for industry default or 1000 for high frequency ESCs.
+ *
+ * Set to 0 for Oneshot125.
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2000
+ * @unit Hz
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_RATE, 50);
+
+/**
+ * Set the minimum PWM for the extra outputs
+ *
+ * Set to 1000 for industry default or 900 to increase servo travel.
+ *
+ * @reboot_required true
+ *
+ * @min 800
+ * @max 1400
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MIN, 1000);
+
+/**
+ * Set the maximum PWM for the extra outputs
+ *
+ * Set to 2000 for industry default or 2100 to increase servo travel.
+ *
+ * @reboot_required true
+ *
+ * @min 1600
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MAX, 2000);
+
+/**
+ * Set the disarmed PWM for extra outputs
+ *
+ * This is the PWM pulse the autopilot is outputting if not armed.
+ * The main use of this parameter is to silence ESCs when they are disarmed.
+ *
+ * @reboot_required true
+ *
+ * @min 0
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_DISARM, 1500);
+
+/******************************************************************************
+*                                 PWM_EXTRA_MIN                                *
+******************************************************************************/
+/**
+ * Set the min PWM value for the extra 1 output
+ *
+ * This is the minimum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MIN will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MIN1, -1);
+
+/**
+ * Set the min PWM value for the extra 2 output
+ *
+ * This is the minimum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MIN will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MIN2, -1);
+
+/**
+ * Set the min PWM value for the extra 3 output
+ *
+ * This is the minimum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MIN will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MIN3, -1);
+
+/**
+ * Set the min PWM value for the extra 4 output
+ *
+ * This is the minimum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MIN will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MIN4, -1);
+
+/**
+ * Set the min PWM value for the extra 5 output
+ *
+ * This is the minimum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MIN will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MIN5, -1);
+
+/**
+ * Set the min PWM value for the extra 6 output
+ *
+ * This is the minimum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MIN will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MIN6, -1);
+
+/**
+ * Set the min PWM value for the extra 7 output
+ *
+ * This is the minimum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MIN will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MIN7, -1);
+
+/**
+ * Set the min PWM value for the extra 8 output
+ *
+ * This is the minimum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MIN will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MIN8, -1);
+
+/******************************************************************************
+*                                 PWM_EXTRA_MAX                                *
+******************************************************************************/
+/**
+ * Set the max PWM value for the extra 1 output
+ *
+ * This is the maximum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MAX will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MAX1, -1);
+
+/**
+ * Set the max PWM value for the extra 2 output
+ *
+ * This is the maximum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MAX will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MAX2, -1);
+
+/**
+ * Set the max PWM value for the extra 3 output
+ *
+ * This is the maximum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MAX will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MAX3, -1);
+
+/**
+ * Set the max PWM value for the extra 4 output
+ *
+ * This is the maximum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MAX will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MAX4, -1);
+
+/**
+ * Set the max PWM value for the extra 5 output
+ *
+ * This is the maximum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MAX will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MAX5, -1);
+
+/**
+ * Set the max PWM value for the extra 6 output
+ *
+ * This is the maximum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MAX will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MAX6, -1);
+
+/**
+ * Set the max PWM value for the extra 7 output
+ *
+ * This is the maximum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MAX will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MAX7, -1);
+
+/**
+ * Set the max PWM value for the extra 8 output
+ *
+ * This is the maximum PWM pulse the autopilot is allowed to output.
+ * When set to -1 the value for PWM_EXTRA_MAX will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_MAX8, -1);
+
+/******************************************************************************
+*                                 PWM_EXTRA_FAIL                                *
+******************************************************************************/
+/**
+ * Set the failsafe PWM for the extra 1 output
+ *
+ * This is the PWM pulse the autopilot is outputting if in failsafe mode.
+ * When set to -1 the value is set automatically depending if the actuator
+ * is a motor (900us) or a servo (1500us)
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_FAIL1, -1);
+
+/**
+ * Set the failsafe PWM for the extra 2 output
+ *
+ * This is the PWM pulse the autopilot is outputting if in failsafe mode.
+ * When set to -1 the value is set automatically depending if the actuator
+ * is a motor (900us) or a servo (1500us)
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_FAIL2, -1);
+
+/**
+ * Set the failsafe PWM for the extra 3 output
+ *
+ * This is the PWM pulse the autopilot is outputting if in failsafe mode.
+ * When set to -1 the value is set automatically depending if the actuator
+ * is a motor (900us) or a servo (1500us)
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_FAIL3, -1);
+
+/**
+ * Set the failsafe PWM for the extra 4 output
+ *
+ * This is the PWM pulse the autopilot is outputting if in failsafe mode.
+ * When set to -1 the value is set automatically depending if the actuator
+ * is a motor (900us) or a servo (1500us)
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_FAIL4, -1);
+
+/**
+ * Set the failsafe PWM for the extra 5 output
+ *
+ * This is the PWM pulse the autopilot is outputting if in failsafe mode.
+ * When set to -1 the value is set automatically depending if the actuator
+ * is a motor (900us) or a servo (1500us)
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_FAIL5, -1);
+
+/**
+ * Set the failsafe PWM for the extra 6 output
+ *
+ * This is the PWM pulse the autopilot is outputting if in failsafe mode.
+ * When set to -1 the value is set automatically depending if the actuator
+ * is a motor (900us) or a servo (1500us)
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_FAIL6, -1);
+
+/**
+ * Set the failsafe PWM for the extra 7 output
+ *
+ * This is the PWM pulse the autopilot is outputting if in failsafe mode.
+ * When set to -1 the value is set automatically depending if the actuator
+ * is a motor (900us) or a servo (1500us)
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_FAIL7, -1);
+
+/**
+ * Set the failsafe PWM for the extra 8 output
+ *
+ * This is the PWM pulse the autopilot is outputting if in failsafe mode.
+ * When set to -1 the value is set automatically depending if the actuator
+ * is a motor (900us) or a servo (1500us)
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_FAIL8, -1);
+
+/******************************************************************************
+*                                 PWM_EXTRA_DIS                                 *
+******************************************************************************/
+/**
+ * Set the disarmed PWM for the extra 1 output
+ *
+ * This is the PWM pulse the autopilot is outputting if not armed.
+ * When set to -1 the value for PWM_EXTRA_DISARM will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_DIS1, -1);
+
+/**
+ * Set the disarmed PWM for the extra 2 output
+ *
+ * This is the PWM pulse the autopilot is outputting if not armed.
+ * When set to -1 the value for PWM_EXTRA_DISARM will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_DIS2, -1);
+
+/**
+ * Set the disarmed PWM for the extra 3 output
+ *
+ * This is the PWM pulse the autopilot is outputting if not armed.
+ * When set to -1 the value for PWM_EXTRA_DISARM will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_DIS3, -1);
+
+/**
+ * Set the disarmed PWM for the extra 4 output
+ *
+ * This is the PWM pulse the autopilot is outputting if not armed.
+ * When set to -1 the value for PWM_EXTRA_DISARM will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_DIS4, -1);
+
+/**
+ * Set the disarmed PWM for the extra 5 output
+ *
+ * This is the PWM pulse the autopilot is outputting if not armed.
+ * When set to -1 the value for PWM_EXTRA_DISARM will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_DIS5, -1);
+
+/**
+ * Set the disarmed PWM for the extra 6 output
+ *
+ * This is the PWM pulse the autopilot is outputting if not armed.
+ * When set to -1 the value for PWM_EXTRA_DISARM will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_DIS6, -1);
+
+/**
+ * Set the disarmed PWM for the extra 7 output
+ *
+ * This is the PWM pulse the autopilot is outputting if not armed.
+ * When set to -1 the value for PWM_EXTRA_DISARM will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_DIS7, -1);
+
+/**
+ * Set the disarmed PWM for the extra 8 output
+ *
+ * This is the PWM pulse the autopilot is outputting if not armed.
+ * When set to -1 the value for PWM_EXTRA_DISARM will be used
+ *
+ * @reboot_required true
+ *
+ * @min -1
+ * @max 2200
+ * @unit us
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_DIS8, -1);
+
+/******************************************************************************
+*                                 PWM_EXTRA_REV                                 *
+******************************************************************************/
+/**
+ * Invert direction of extra output channel 1
+ *
+ * Enable to invert the channel.
+ * Warning: Use this parameter when connected to a servo only.
+ * For a brushless motor, invert manually two phases to reverse the direction.
+ *
+ * @boolean
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_REV1, 0);
+
+/**
+ * Invert direction of extra output channel 2
+ *
+ * Enable to invert the channel.
+ * Warning: Use this parameter when connected to a servo only.
+ * For a brushless motor, invert manually two phases to reverse the direction.
+ *
+ * @boolean
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_REV2, 0);
+
+/**
+ * Invert direction of extra output channel 3
+ *
+ * Enable to invert the channel.
+ * Warning: Use this parameter when connected to a servo only.
+ * For a brushless motor, invert manually two phases to reverse the direction.
+ *
+ * @boolean
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_REV3, 0);
+
+/**
+ * Invert direction of extra output channel 4
+ *
+ * Enable to invert the channel.
+ * Warning: Use this parameter when connected to a servo only.
+ * For a brushless motor, invert manually two phases to reverse the direction.
+ *
+ * @boolean
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_REV4, 0);
+
+/**
+ * Invert direction of extra output channel 5
+ *
+ * Enable to invert the channel.
+ * Warning: Use this parameter when connected to a servo only.
+ * For a brushless motor, invert manually two phases to reverse the direction.
+ *
+ * @boolean
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_REV5, 0);
+
+/**
+ * Invert direction of extra output channel 6
+ *
+ * Enable to invert the channel.
+ * Warning: Use this parameter when connected to a servo only.
+ * For a brushless motor, invert manually two phases to reverse the direction.
+ *
+ * @boolean
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_REV6, 0);
+
+/**
+ * Invert direction of extra output channel 7
+ *
+ * Enable to invert the channel.
+ * Warning: Use this parameter when connected to a servo only.
+ * For a brushless motor, invert manually two phases to reverse the direction.
+ *
+ * @boolean
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_REV7, 0);
+
+/**
+ * Invert direction of extra output channel 8
+ *
+ * Enable to invert the channel.
+ * Warning: Use this parameter when connected to a servo only.
+ * For a brushless motor, invert manually two phases to reverse the direction.
+ *
+ * @boolean
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_EXTRA_REV8, 0);
+
+/******************************************************************************
+*                                PWM_EXTRA_TRIM                                 *
+******************************************************************************/
+
+/**
+ * Trim value for extra output channel 1
+ *
+ * Set to normalized offset
+ *
+ * @min -0.2
+ * @max 0.2
+ * @decimal 2
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_FLOAT(PWM_EXTRA_TRIM1, 0);
+
+/**
+ * Trim value for extra output channel 2
+ *
+ * Set to normalized offset
+ *
+ * @min -0.2
+ * @max 0.2
+ * @decimal 2
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_FLOAT(PWM_EXTRA_TRIM2, 0);
+
+/**
+ * Trim value for extra output channel 3
+ *
+ * Set to normalized offset
+ *
+ * @min -0.2
+ * @max 0.2
+ * @decimal 2
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_FLOAT(PWM_EXTRA_TRIM3, 0);
+
+/**
+ * Trim value for extra output channel 4
+ *
+ * Set to normalized offset
+ *
+ * @min -0.2
+ * @max 0.2
+ * @decimal 2
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_FLOAT(PWM_EXTRA_TRIM4, 0);
+
+/**
+ * Trim value for extra output channel 5
+ *
+ * Set to normalized offset
+ *
+ * @min -0.2
+ * @max 0.2
+ * @decimal 2
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_FLOAT(PWM_EXTRA_TRIM5, 0);
+
+/**
+ * Trim value for extra output channel 6
+ *
+ * Set to normalized offset
+ *
+ * @min -0.2
+ * @max 0.2
+ * @decimal 2
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_FLOAT(PWM_EXTRA_TRIM6, 0);
+
+/**
+ * Trim value for extra output channel 7
+ *
+ * Set to normalized offset
+ *
+ * @min -0.2
+ * @max 0.2
+ * @decimal 2
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_FLOAT(PWM_EXTRA_TRIM7, 0);
+
+/**
+ * Trim value for extra output channel 8
+ *
+ * Set to normalized offset
+ *
+ * @min -0.2
+ * @max 0.2
+ * @decimal 2
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_FLOAT(PWM_EXTRA_TRIM8, 0);