FrSky Xact Servo Programming Guide

FrSky Xact servos are one of the recent additions to the FrSky product lineup.

Coreless.

Programmable.

Full CNC aluminum body.

With a Hall Sensor for maximum precision.

What else would you ask for a servo?

We had our hands on the 5700 & 5800 series units and have to assume that these are some of the greatest servos we tested so far.

Check the tests of the FrSky Xact D5701 & FrSky Xact LD5801 to learn more

They are lightning-fast at the top of the allowed voltage preserving precision at the lowest available volts.

So in this guide, we’ll focus on the FrSky Xact Servo Programming process.

3 Ways To FrSky Servo Programming

Generally speaking, you can do it with:

Ethos FrSky Radio
OpenTx ACCESS FrSky Radio
FrSky Freelink App

The first two methods will have different interfaces, since using different OS, but the logic of programming with Ethos is very similar.

In this guide, we’ll focus on the process of programming with an OpenTX Radio exclusively.

Xact Servo Programming With OpenTx

First of all, you will need your Tx to support the ACCESS radio protocol.

Certain radios do.

Second, you will need a compatible Rx that also supports ACCESS firmware and FBUS connection.

Make sure that your radio, Internal RF module, and Rx are running the latest available stable software by FrSky.

Next, get a FrSky Servo LUA script and load it to the SD card of your OpenTx radio.

Learn how to use it.

Note, that you can program only one servo at a time.

So, to finalize the setup, connect your servo to the Smart Port pin on your Rx and make sure that the servo Ground and Power lines are also connected.

I.e., check how to connect an Xact Servo to the Archer R4 receiver for programming:

Now, power up your radio and receiver.

Make sure the receiver is registered and bound to the current model and the link is established.

Next, scroll down the model setting menu to where you see the name of your Rx and press on it.

Choose the Options from the menu to access the receiver settings screen.

Set the FBUS(FPORT) protocol for the receiver Smart Port.

If you don’t see this option, you will need to update your receiver firmware.

Exit the receiver options screen and move to the Telemetry screen in the OpenTx menu on your radio.

Delete all the existing sensors, if there are some.

Skip this step if you are configuring a blank model.

Before the next step, make sure that:

Your receiver is powered up
The Xact servo is connected to the receiver Smart Port
The current model of the radio speaks to the receiver

When all the above are true, hit the Discover New Sensors.

You should get the list that will include the sensors of your Rx, plus the new sensors related to the Xact servo.

In particular:

SrvA – servo current
SrvV – voltage on the servo
SrvT – temperature of the servo
SrvS – Status

Hit Stop Discovery once all these appear.

This is a critical step, as these sensors are the main indicators that the servo is connected properly, so you will be able to program it via the LUA script next.

Finally, head to the Tools menu of your radio, and launch the FrSky Servo LUA script.

Give it time for the progress bar on top to complete and load the values.

Configurable FrSky Servo Settings

Now, it’s time to play around with the settings for your connected servo.

Most of the time, you will get the following list of parameters:

Physical ID
Servo ID
Refresh Timer
Range (rotation angle)
Rotation Direction
PWM Pulse Type
Smart Port Channel ID
Center Position

Quick Tip: Set the S.Port Channel ID value between 1-4 to verify the changes you are performing in the LUA script. It will react to the channel 1-4 inputs respectively, say, stick movements.