FrSky TANDEM X20 User manual

X20 and Ethos
User Manual

Table of Contents
Main Views.................................................................................................................................. 1
The Top Bar............................................................................................................................. 1
The Bottom Bar.......................................................................................................................1
The Widgets Area....................................................................................................................1
User Interface and Navigation.....................................................................................................2
Editing ontrols.......................................................................................................................2
Virtual Keyboard.................................................................................................................2
Number Value ontrols.......................................................................................................3
Options feature...................................................................................................................3
USB onnection To P modes....................................................................................................6
Power Off mode...................................................................................................................... 6
Bootloader mode.....................................................................................................................6
Power On mode......................................................................................................................6
Emergency Mode......................................................................................................................... 7
System Setup.............................................................................................................................. 8
Overview................................................................................................................................. 8
File Manager.......................................................................................................................8
Alerts..................................................................................................................................8
Date & Time........................................................................................................................8
General............................................................................................................................... 8
Battery................................................................................................................................ 8
Hardware............................................................................................................................8
Sticks.................................................................................................................................. 8
Wireless.............................................................................................................................. 8
Info..................................................................................................................................... 8
File Manager........................................................................................................................... 9
Alerts..................................................................................................................................... 13
Silent Mode heck............................................................................................................13
Main Battery heck..........................................................................................................13
RT Battery heck...........................................................................................................13
Inactivity............................................................................................................................13
Date and Time.......................................................................................................................14
24 Hour time.....................................................................................................................14
Display seconds...............................................................................................................14
Date.................................................................................................................................. 14
Time..................................................................................................................................14
Time Zone........................................................................................................................ 14
Adjust RT Speed............................................................................................................ 14
Auto Adjust from GPS.......................................................................................................15
General................................................................................................................................. 16
Language.......................................................................................................................... 16
Display Attributes.............................................................................................................. 17
Audio Settings..................................................................................................................19
Vario................................................................................................................................. 20
Haptic............................................................................................................................... 20
Top Toolbar....................................................................................................................... 21
Battery................................................................................................................................... 22
Main Voltage.....................................................................................................................22
Low Voltage...................................................................................................................... 22
Display voltage range.......................................................................................................22
RT voltage...................................................................................................................... 23
Hardware.............................................................................................................................. 24

Hardware check................................................................................................................24
Analogs calibration...........................................................................................................25
Gyro calibration................................................................................................................25
Analogs Filter.................................................................................................................... 25
Pots/Sliders Settings.........................................................................................................26
Switches Settings.............................................................................................................26
Home Keymap..................................................................................................................27
AD value inspector......................................................................................................... 28
Sticks.................................................................................................................................... 29
hannel Order..................................................................................................................29
First four channels fixed....................................................................................................30
Wireless................................................................................................................................ 31
Bluetooth Mode................................................................................................................31
Info........................................................................................................................................ 36
Firmware........................................................................................................................... 36
Firmware Version..............................................................................................................36
Date.................................................................................................................................. 36
Sticks................................................................................................................................ 36
Internal Module................................................................................................................. 36
Receiver........................................................................................................................... 37
External Module................................................................................................................37
Model Setup...............................................................................................................................38
Overview............................................................................................................................... 38
Model Select..................................................................................................................... 38
Edit Model......................................................................................................................... 38
Flight Modes.....................................................................................................................38
Mixer................................................................................................................................. 38
Outputs.............................................................................................................................38
Timers............................................................................................................................... 38
Trims.................................................................................................................................38
RF System........................................................................................................................ 39
Telemetry..........................................................................................................................39
hecklist........................................................................................................................... 39
Logic Switches..................................................................................................................39
Special Functions.............................................................................................................39
urves.............................................................................................................................. 39
Trainer..............................................................................................................................40
Device onfig...................................................................................................................40
Model Select......................................................................................................................... 41
Managing Model Folders..................................................................................................41
Adding a New Model.........................................................................................................43
Selecting a Model.............................................................................................................44
Edit model............................................................................................................................. 46
Name, Picture................................................................................................................... 46
Model Type....................................................................................................................... 46
hannel Assignments.......................................................................................................46
Function Switches............................................................................................................. 47
Persistent..........................................................................................................................47
Reset All Mixers................................................................................................................47
Flight Modes.......................................................................................................................... 48
Name................................................................................................................................49
Active ondition................................................................................................................ 49
Fade In, Out...................................................................................................................... 49
Trims.................................................................................................................................49
Flight Mode Management.................................................................................................50

Mixer..................................................................................................................................... 51
Aileron, Elevator, Rudder Mixer........................................................................................52
Throttle Mixer.................................................................................................................... 55
View per hannel option (mixer grouping)........................................................................58
Predefined Mixes..............................................................................................................61
Outputs................................................................................................................................. 70
Outputs Setup...................................................................................................................71
Timers................................................................................................................................... 73
Name................................................................................................................................74
Mode................................................................................................................................ 74
Alarm/Start Value..............................................................................................................74
Sound............................................................................................................................... 74
Haptic............................................................................................................................... 74
ountdown Start...............................................................................................................74
ountdown Step...............................................................................................................74
Timer Elapsed Audio File..................................................................................................74
Active ondition................................................................................................................ 75
Reset................................................................................................................................ 76
Persistent..........................................................................................................................76
Trims..................................................................................................................................... 77
Trim Mode........................................................................................................................ 77
Extended Trims.................................................................................................................78
Independent Trim per Flight Mode....................................................................................78
ross Trim........................................................................................................................ 78
RF System............................................................................................................................ 79
Owner Registration ID......................................................................................................79
Internal Module................................................................................................................. 79
External Module..............................................................................................................108
Telemetry............................................................................................................................. 111
Smart Port telemetry.......................................................................................................111
FBUS control and telemetry............................................................................................113
Telemetry features in A ESS.......................................................................................113
Telemetry Settings..........................................................................................................116
hecklist..............................................................................................................................127
Throttle heck................................................................................................................127
Failsafe heck................................................................................................................127
Pots / Sliders heck.......................................................................................................128
Switches heck..............................................................................................................128
Function Switches heck................................................................................................129
Logic Switches....................................................................................................................130
Adding Logic Switches....................................................................................................131
Logic Switches – Shared Parameters.............................................................................137
Option to Ignore Trainer Input.........................................................................................138
Logic Switches – Use with Telemetry..............................................................................138
Special Functions................................................................................................................139
Special Functions...........................................................................................................140
urves................................................................................................................................. 146
Expo............................................................................................................................... 147
Function.......................................................................................................................... 147
ustom...........................................................................................................................150
Trainer.................................................................................................................................152
Trainer Mode = Master...................................................................................................152
Trainer Mode = Slave.....................................................................................................156
Device onfig...................................................................................................................... 157
onfigure Screens...................................................................................................................158

onfiguring the main screen................................................................................................159
Adding additional screens...................................................................................................160
Adding ustom Widgets......................................................................................................161
Lua Scripts...............................................................................................................................162
ETHOS Lua Interpreter.......................................................................................................162
ETHOS Lua Documentation................................................................................................162
ETHOS Lua Example Script Files Location.........................................................................162
Lua Scripting onfiguration Limits.......................................................................................162
Basic Layout of a Lua Widget..............................................................................................163
key (string)......................................................................................................................163
name (string or function).................................................................................................163
create (function)..............................................................................................................163
configure (function).........................................................................................................163
wakeup (function)...........................................................................................................163
event (function)...............................................................................................................163
paint (function)................................................................................................................163
read (function)................................................................................................................163
write (function)................................................................................................................163
Programming Tutorials.............................................................................................................164
Initial radio setup example...................................................................................................164
Step 1. harge the radio and flight batteries...................................................................164
Step 2. alibrate the hardware.......................................................................................164
Step 3. Perform the Radio System setup........................................................................164
Basic Fixed Wing Airplane example....................................................................................166
Step 1. onfirm System settings.....................................................................................166
Step 2. Identify the servos/channels required.................................................................166
Step 3. reate a new model...........................................................................................166
Step 4. Review and configure the mixes.........................................................................169
Step 5. onfigure the Outputs........................................................................................174
Step 6. Introduction to Flight Modes...............................................................................177
Step 7. Set up a flight battery timer.................................................................................178
Step 8. Add a mix for retracts..........................................................................................179
Basic Flying Wing (Elevon) Airplane example.....................................................................180
Step 1. onfirm System settings.....................................................................................180
Step 2. Identify the servos/channels required.................................................................180
Step 3. reate a new model...........................................................................................180
Step 4. Review and configure the mixes.........................................................................182
Step 5. Review the Mixes...............................................................................................184
Step 6. onfigure the maximum servo throws................................................................185
Basic Flybarless Helicopter example...................................................................................186
Step 1. onfirm System settings.....................................................................................186
Step 2. Identify the servos/channels required.................................................................186
Step 3. reate a new model...........................................................................................186
Step 4. Review and configure the mixes.........................................................................188
Step 5. FBL Setup..........................................................................................................192
'How To' section................................................................................................................... 193
1. How to set up a low battery voltage warning...............................................................193
2. How to set up a battery capacity warning using a Neuron ES ..................................196
3. How to set up a battery capacity warning using a calculated sensor..........................198
4. How to create a model for SR8/SR10.........................................................................201
5. How to reorder channels e.g. for SR8/SR10...............................................................202
6. How to configure a Butterfly (aka row) mix...............................................................205
7. How to configure an FBUS system.............................................................................212
Ethos Suite.............................................................................................................................. 219
Overview.............................................................................................................................219

Procedure for migrating to Ethos Suite................................................................................219
Operation............................................................................................................................ 221
Welcome Section............................................................................................................221
Radio Section.................................................................................................................222
Tools Section..................................................................................................................228
Others Section................................................................................................................231
DFU Mode...................................................................................................................... 233

X20/X20S and Ethos v1.2.10 User Manual
Main Views
Ethos allows the user considerable flexibility in what is displayed in the Main iews. Initially
only the basic information shown below is displayed, until the user customizes or adds views
and widgets to be displayed. Note that up to eight Main iews may be defined.
The Main iews normally share the top and bottom bars, but there is a full screen option.
Please refer to the Configure Screens section for details on configuring the views.
The Top Bar
The top bar displays the model name on the left, as well as the active Flight Mode if
configured. On the right are icons for:
•Whether data logging is active
•Trainer icon for Master or Slave as appropriate
•RSSI 2.4G
•RSSI 900MHz
•Speaker sound volume
•Radio battery status
Touching the speaker and battery icons will bring up the relevant General (Audio etc.) and
Battery control panels.
The Bottom Bar
The bottom bar has four tabs for accessing the top level functions, i.e from left to right: Home,
Model Setup, Configure Screens, and System Setup. The system time is displayed on the right.
Touching the time will bring up the Date & Time settings.
The Widgets Area
The middle area of the Main iews consists of widgets which may be configured to display
images, timers, telemetry data, radio values etc. The default main screen has a widget on the
left for a model image and three widgets for timers, as well as displaying the trims and pots.
The widgets are user configurable to display other information. Once multiple screens have
been configured, they can be accessed using a touch swipe gesture or navigation controls.
Please refer to the Configure Screens section for more details.
Note: The ‘Throttle ACTI E’ widget above is the Status widget available in the FrSky - ETHOS
Lua Script Programming thread on rcgroups.
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X20/X20S and Ethos v1.2.10 User Manual
User Interface and Navigation
The X20/X20S has a touch screen, making the user interface quite intuitive. Touching the
Model Setup (Airplane icon), Configure Screens (Multiple Screens icon), and System Setup
(Gear icon) tabs take you directly to those functions, which are described in those sections of
the manual. They can also be accessed using the [MDL], [DISP] and [SYS] keys respectively.
A long press on the [RTN] key will return you to the Home screen from any sub-menu.
Touching the system time on the right of the bottom bar takes you to the Date & Time section,
allowing you to set the time and date.
Touching the speaker or battery icons in the top bar will bring up the relevant Sound & ibr.
and Battery control panels.
Editing Controls
Virtual Keyboard
Ethos provides a virtual keyboard for editing text fields.
Simply touch on any text field (or click [ENT]) to bring up the keyboard.
Touch the '?123' or 'abc' key to toggle between alpha and numeric keypads. There is also a
Caps lock for entering uppercase letters.
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X20/X20S and Ethos v1.2.10 User Manual
Number Value Controls
When touching a Number alue a dialog pops up with keys for setting the value to Min,
Default or Max, and also 'plus' and 'minus' keys for incrementing or decrementing the value.
In addition, the slider across the bottom allows for the rotary encoder output per click to be
adjusted from 1:1 or fine on the left, and coarse on the right. The slider may also be
adjusted with the rotary encoder while the [Page] key is held down.
Another example is a Telemetry Range value, which can be edited in a similar way.
Options feature
Ethos has a very powerful 'Options' feature. Almost anywhere a value or source is expected,
a long press of the Enter key will bring up an Options dialog.
Fields with this feature can be identified by the square dot in the top left corner of the field.
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X20/X20S and Ethos v1.2.10 User Manual
Value options
The alue Options dialog shows which parameter is being configured. In this example
you have the choice of setting the Weight/Rates to maximum or minimum, or to use a
source. Using a source like a Pot would allow the Weight/Rates to be adjusted in flight.
If you click on a alue field that has already been changed to use a source, a dialog pops
up allowing you to convert the source's current value to a fixed value. Clicking on
'Options' will bring up options for the source, see below.
Source Options
Invert
Invert allows a source such as a switch position to be negated or inverted. For
example instead of being active when switch SA is up, it would be active when switch
SA is NOT up, i.e. in either the mid or down positions.
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