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Previous Page – OpenTX V2.0

OpenTX Version 2.1

Provided here is a description of the features of OpenTX to be addressed when upgrading from version 2.0 to version 2.1.

 

Contents

OpenTX V2.1 Features

Audio Files

Telemetry

   Discovering New Sensors

   X4R, X6R & X8R Receivers

   FLVSS

      Battery Cell Voltages

      Lowest or Highest Battery Cell Voltage

      Difference Between Lowest & Highest Cell Voltages

   Variometer

   GPS

      Height Above Ground Level

      Distance

      Range

   Current Sensor 150A

      Battery Charge Consumption (mAh)

S3 Switch Configuration

Helicopter CCPM

Global Functions

Application Notes

30 Voltage Sensor - FLVSS

31 Throttle Setting Announcement

32 Helicopter Set Up - Flybarless

33 S6R Receiver Set Up

34 RPM & Temperature Sensor

35 Air Speed Sensor

 

 
OpenTX Update News

24/12/16

App. Note 35 added.

2/12/16

App. Note 34 added.

18/11/16

App. Note 33 added.

07/11/16

App. Note 32 added.

10/04/16

Telemetry descriptions added.

06/04/16

App. Note 31 added.

02/04/16

This page updated – various additions.

31/03/16

This page updated – audio files, telemetry, S3 configuration.

08/03/16

App. note 30 added.

08/03/16

OpenTX V2.1 Contents page introduced.

 

Audio Files

A new set of audio files must be downloaded to replace the current files in the SOUNDS folder of the SD card. Download the files starting under the Sound Packs heading at this site.

http://www.open-tx.org/downloads.html

If you need any of your own user defined audio files, add these to the SOUNDS folder after installing the v2.1 audio files.

Telemetry

In OpenTX version 2.0, the parameter names automatically appeared as choices in functions as long as the telemetry sensor was connected.

In OpenTX 2.1, however, parameters have to be either scanned for, or defined. This has to be done for each model. It is done in the telemetry Set Up screen. This only has to be done once whenever a new sensor is added. Thereafter the parameters are retained for that model.

If any telemetry values were used in logical switches, they will need to be checked and probably edited to achieve the original functionality.

Discovering New Sensors

Turn the receiver power on. On the model Telemetry screen, select ‘Discover new sensors’. While selected, press the Enter key. A list of telemetry parameters is created. If there are no smart port sensors plugged into the receiver, only the receiver sensors are found and set up. If any smart port sensors are connected, their parameters are added to the list.

Note that the minimum and maximum values are also defined for each parameter, even though they are not displayed on the sensor list. For example, when RSSI is defined, RSSI- and RSSI+ also become available.

X4R, X6R & X8R Receivers

X4R, X6R and X8R receivers themselves send some parameters. They are listed here.

 

Receiver

Parameter

Description

X4R

RSSI

RxBt

A2

Received signal strength indication.

Receiver battery voltage.

Analog input voltage.

X6R, X8R

RSSI

RxBt

Received signal strength indication.

Receiver battery voltage.

FLVSS (FrSky LiPo Voltage Sensor with Smart Port)

The FLVSS sensor adds the following parameter to the list.

 

Sensor

Parameter

Description

FLVSS

Cels

Battery total voltage

 

Using the FLVSS, sensors can be defined to derive the following information.

  Individual battery cell voltages,

  Lowest battery cell voltage,

  Highest battery cell voltage,

  Delta – difference between the lowest and highest cell voltages.

Battery Cell Voltages

To derive an individual cell voltage, a new sensor must be defined.

Select ‘Add a new sensor’ and press Enter. A sensor with default parameters is displayed. Enter the parameters as shown in this table.

 

Sensor 5

4.09V

 

The value of the sensor is shown here when set up is complete.

Name

Cel1

 

I have chosen the name ‘Cel1’ for cell one.

Type

Calculated

 

 

Formula

Cell

 

 

Cell sensor

Cels

 

 

Cell index

1

 

Select the cell number here.

Logs

(tick)

 

Tick to have this sensor data recorded during logging

 

Press Exit and the following item is displayed on the list.

 

Sensors

Value

ID

 

Cel1

4.09V

 

Note that there is no ID for this sensor

 

Note that Cel1- (minimum value of Cel1) and Cel1+ (maximum value of Cel1) are automatically defined. Define sensors for cells 2, 3 etc. up to 6 in a similar way.

Lowest or Highest Battery Cell Voltage

To derive the lowest or the highest battery cell voltage, a new sensor must be defined.

Select ‘Add a new sensor’ and press Enter. A sensor with default parameters is displayed. Enter the parameters as shown in this table.

 

Sensor 6

4.02V

 

The value of the sensor is shown here when set up is complete.

Name

Cmin

 

I have chosen the name ‘Cmin’ for minimum cell voltage.

Type

Calculated

 

Choose ‘Cmax’ for maximum cell voltage.

Formula

Cell

 

 

Cell sensor

Cels

 

 

Cell index

Lowest

 

Select Lowest or Highest here.

Logs

(tick)

 

Tick to have this sensor data recorded during logging

 

Press Exit and the following item is displayed on the list.

 

Sensors

Value

ID

 

Cmin

4.02V

 

Note that there is no ID for this sensor

 

Cmin becomes the value of the lowest or highest battery cell voltage.

Note that Cmin- (minimum value of Cmin and Cmin+ (maximum value of Cmin) are automatically defined. Similar for Cmax- and Cmax+.

Difference Between the Lowest & Highest Battery Cell Voltages

To derive the difference between the lowest and the highest battery cell voltages, a new sensor must be defined. Select ‘Add a new sensor’ and press Enter. A sensor with default parameters is displayed. Enter the parameters as shown in this table. Press exit when complete.

 

Sensor 8

0.02V

 

The value of the sensor is shown here when set up is complete.

Name

Cdif

 

I have chosen the name ‘Cdif’ for cell voltage difference.

Type

Calculated

 

 

Formula

Cell

 

 

Cell sensor

Cels

 

 

Cell index

Delta

 

Select Delta for difference between lowest and highest..

Logs

(tick)

 

Tick to have this sensor data recorded during logging

 

 

Cdif becomes the difference between the lowest and highest cell voltages.

Note that Cdel- (minimum value of Cdel and Cdif+ (maximum value of Cdel) are automatically defined.

Variometer

The vario sensor adds the following parameters to the list.

 

Sensor

Parameter

Description

Vario

Alt

VSpd

Altitude

Vertical speed

 

To enable the vario, on the Telemetry screen under the ‘Variometer’ heading, set ‘VSpd’ as the source, as shown here.

 

Variometer

   Source

   Range

   Center

 

VSpd

-10

-0.5

 

 

10

0.5

 

 

 

Tone

 

 

Replace ‘Tone’ with ‘Silent’ to turn off the tone in the centre range.

 

Use a special function to turn the vario on and off using, for example, switch SD.

 

Function Number

Source

Function

Parameter 1

Parameter 2

Check Box

SF5

SD

Vario

 

 

 

In this example, when switch SD is down, the vario tone is minimum when the vertical speed is -10m/S. The tone is maximum when the vertical speed is +10m/S. When SD is not down, the vario tone is off.

GPS (Global Positioning System)

The GPS sensor adds the following parameters to the list.

 

Sensor

Parameter

Description

GPS

GPS

Galt

GSpd

Date

Longitude, latitude

Altitude above sea level

Speed

Date, Time

Height Above Ground Level

Galt provides altitude above sea level.

To derive the height above ground level, make a copy of the Galt sensor and then change the name to ‘AGL’ and tick the ‘Auto Offset’ parameter.

 

Sensor 9

0m

 

The value of the sensor is shown here when set up is complete.

Name

AGL

 

I have chosen the name ‘AGL’.

Type

Custom

 

 

ID

0820    4

 

 

Unit

m

 

 

Precision

0.0

 

 

Ratio

Offset

Auto Offset

Positive

Filter

Persistent

 

0.0

(tick)

 

 

 

Tick the ‘Auto Offset’ parameter.

Logs

(tick)

 

Tick to have this sensor data recorded during logging.

 

When the telemetry is reset, AGL will be set to zero while Galt has the altitude above sea level.

Distance

Distance is the horizontal distance between the ‘power on’ location (or telemetry reset location) and the aircraft. To derive the distance, a new sensor must be defined.

Select ‘Add a new sensor’ and press Enter. A sensor with default parameters is displayed. Enter the parameters as shown in this table. Press exit when complete.

 

Sensor 10

0m

 

The value of the sensor is shown here when set up is complete.

Name

Dist

 

I have chosen the name ‘Dist’.

Type

Calculated

 

 

Formula

Distance

 

 

Unit

m

 

 

GPS sensor

GPS

 

 

Alt sensor

---

 

 

Logs

(tick)

 

Tick to have this sensor data recorded during logging.

Range

Range is the distance from the ‘power on’ location and the aircraft in a direct line. It is calculated using Dist and AGL as the horizontal and vertical sides of a triangle. Range is the hypotenuse of the triangle.

 

Sensor 11

0m

 

The value of the sensor is shown here when set up is complete.

Name

Rnge

 

I have chosen the name ‘Rnge’.

Type

Calculated

 

 

Formula

Distance

 

 

Unit

m

 

 

GPS sensor

GPS

 

 

Alt sensor

AGL

 

Select AGL as the altitude sensor.

Logs

(tick)

 

Tick to have this sensor data recorded during logging.

Current Sensor 150A

The 150A Current Sensor adds the following parameter to the list.

 

Sensor

Parameter

Description

Current Sensor, 150A

Curr

Current

Battery Charge Consumption (mAh)

To derive the consumption of battery charge in mAh, a new sensor must be defined.

Select ‘Add a new sensor’ and press Enter. A sensor with default parameters is displayed. Enter the parameters as shown in this table. Press exit when complete.

 

Sensor 12

0m

 

The value of the sensor is shown here when set up is complete.

Name

mAh

 

I have chosen the name ‘mAh.

Type

Calculated

 

 

Formula

Consumpt

 

 

Sensor

Curr

 

 

Persistent

 

 

 

Logs

(tick)

 

Tick to have this sensor data recorded during logging

S3 Switch Configuration

After installation of OpenTX v2.1, if a multiposition switch is installed as S3, it must be reconfigured.

On the Hardware screen, scroll down to S3 under the Pots heading. Change the ‘None’ parameter to “Multipos switch’.

Now on the Calibration screen, check S3 calibration. Recalibrate if necessary.

Helicopter CCPM

CCPM (Collective, Cyclic and Pitch Mixing) is set up on the Heli Setup screen.

Data on the Heli Setup screen enables the CYC1, CYC2 and CYC3 parameters to control the three swashplate servos. When OpenTX v2.1 is installed, helicopter models are converted with all the Heli setup parameters blank! These parameters must be edited to make the CYC parameters work again.

 

This is an original OpenTX v2.0 Heli Setup screen for a CopterX 450 helicopter.

 

This is the OpenTX v2.1 Heli Setup screen for the same helicopter with parameters filled in.

 

To invert the ‘Long Cyc.’, set the weight to -100.

IEle and IAil are defined on the Inputs screen.

 

The CYC parameters are used in the mixer screen to control the appropriate channels for the swashplate servos. The Mixer screen programming in OpenTX 2.0 does not need to be changed when updating to OpenTX 2.1.

 

 

Similarly, the Inputs screen programming does not need to be changed.

 

Global Functions

A screen of global functions has been added to the Radio Setup group of screens. Functions created on this screen apply regardless of which model is selected. For example, instead of putting a special function into every model to use LS1 to control the audio volume, the same function can be put once into the Global Functions screen and it will apply whichever model is selected.

 

 

Phantom Divide

 

Previous Page – OpenTX V2.0

 

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