Single Channel Mode Switch for OpenTX

Introduction

Instead of using 4 channels and 4 switches to set the basic PX4 system modes you can configure your RC to map 4 switches to 1 channel. The additional 3 channels are then free for other functionality. The setup needs configuration on your RC as well as on the PX4. The Alternative Mode Switch Configurations page gives an overview about the alternative mode switching setups and goes into how to configure the PX4.

Download the excellent TX-Companion from http://www.open-tx.org/. The simulator allows you to play with your settings without even touching your remote control. Also, if your RC has a USB port you can directly flash your settings.

RC Setup

The following pictures illustrate the setup on a Turnigy 9x. The sticks are used as follows:

Switch Function
RUD Return
3POS Mode
AIL Posctl
Ele Loiter
Gea not set, can be used

There is no need to configure curves.

PX4 Setup

You can directly import the following params via QGC.

1	1	RC_ASSIST_TH	0.11	9
1	1	RC_AUTO_TH	0.27	9
1	1	RC_LOITER_TH	0.35	9
1	1	RC_MAP_LOITER_SW	5	6
1	1	RC_MAP_MODE_SW	5	6
1	1	RC_MAP_POSCTL_SW	5	6
1	1	RC_MAP_RETURN_SW	5	6
1	1	RC_MAP_THROTTLE	4	6
1	1	RC_POSCTL_TH	0.19	9
1	1	RC_RETURN_TH	0.5	9

See Alternative Mode Switch Configurations for more explanations

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