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• See also:

  • HoTT Update

  • Firmware-0.86

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Graupner MX-20 HoTT

The MX-20 HoTT is an ideal transmitter for the MikroKopter.

• Graupner MX-20 HoTT Shop-Link

Data:

• 12 channels for Switches and Potis

• 2,4GHz transmission system

• Bi-directional communication between transmitter and receiver

• Display of the Mikrokopter telemetry on an illuminated 8x21 character LCD

• Voice output of the telemetry values

• 7 switches (2 three-way-switches, 3 two-way-switches and 2 buttons)

• 3 analogue potis

• Inbuilt DSC socket for connection of flight simulators (AeroSim) or a TrainerMode system

• Over 200 systems can be used simultaneously -> No arrangement on channels like at 35Mhz systems

• Futureproof with the update capability via USB interface (HoTT update)

• Five different menu languages??: German, English, French, later Italian and Spanish possible via software update

• The telemetry can be logged on a microSD card in the transmitter

Manual for the MX-20

The manual can be downloaded here: Programming Manual

Configure the transmitter

Choose a language

The language can be selected at the transmitter. This can be done in the menu HIDDEN MODE.
Here are the steps:

• Transmitter ON.

• Press both arrows (up/down) from the left and SET of the right side together.

• After ~one sec. you should see the menu HIDDEN MODE.

• In this menu you can change the language of LANGUAGE and VOICE.

• Now you can chose with the arrows (up/down) the menu which you want to change.

• With SET you can start the changing of the chosen menu.

• With ESC you can stop the changing of the chosen menu.

(See also english manual "33116_mx16_HoTT_2_gb.pdf", Page 26)

Set Stick Mode

Change the transmitter to stick mode 2. With this the transmitter will be set to "gas left".

• Press "SET" in the opening screen to get into the settings
• Select "Base setup model" with Up / Down
• Select "Stick mode" under "Basic Settings"
  • scroll down once
  • select the value with "SET" and change it to 2 with Up/Down
  • Save with "SET"

Channelassignment at mode2:

• Channel 1 = Throttle
• Channel 2 = Roll
• Channel 3 = Nick
• Channel 4 = Yaw

Spring in the transmitter

By default there is a spring at the gas stick which keeps it always in the center position.

If you want to fly with vario-height regulator all the time, you don't need to remove the spring.

You should set the "Vario Neutral point" to 127 in the setting (EasyConfig):

If you prefer a notch instead of a spring, you can read in the Manual on page 18.

Binding

Transmitter and receiver have to be bound together, so that the receiver only reacts to that transmitter.

• When turning on the transmitter you see the message RF ON / OFF. Choose OFF.

• The receiver have to be supplied with 5V (via 3-core-wire from the FlightControl)

• Press "SET" in the opening screen to get into the settings
• Select "Base setup model" with Up / Down

• Select "RF BIND" under "Basic Settings" -> don't press SET yet

  • Only if there is already a "BIND", press once "SET" to get a "n/v".
• Now hold down the button at the receiver for 3 seconds until the red and green LEDs light together (maybe difficult to see that clearly)
• Press "SET" within 3 seconds (in the row "RF BIND)
• "Finding" appears in the display
• "RF BIND [bind]" appears in the display at success and the green LED lights continously at the receiver

Set the receiver to sum-signal

The Mikrokopter needs a so-called sum-signal. All channels of the receiver are included in it. This makes the wireing a lot easier compared to normal servo-receivers.

• The receiver has to be turned on and bound

• Hold down "ESC" at the transmitter for about 2 seconds -> You get into the menu "Telemetry"

• Select "SETTING & DATA VIEW" (press down and SET)

• You get into a menu which is generated by the receiver
• Switch to the menu "RX SERVO TEST" by pressing "right" 5 times
• Select "CH OUT TYPE" and set to "SUMO" with Up/Down
• Confirm with SET.
• You get to the data field with the number of channels in the sum-signal. Set this to "12" with Up/Down

Assign channels

Here the required switches and potis of the transmitter will be linked with the transmitted channels.

• Press "SET" in the opening screen to get into the settings
• Select "Control Adjust" with Up/Down
• Turn the switch to the desired "OFF"-position (with this, the direction of the switsch will be set)
• Select "Input x" and confirm with SET.
• Move desired switch
• Repeat the operations for the channels 5-12

Examples for the channel assignment

• Channel 5 -> Two-way-switch right 2 (SW2) -> for height switch e.g.

• Channel 6 -> Three-way-switch right down 10 (CTRL 10) -> for GPS e.g.

• Channel 7 -> Rotary poti left (CTRL 6) -> for camera tilt e.g.

• Channel 8 -> Two-way switch right 3 (SW3) -> for CareFree e.g.

• Channel 9 -> Three-way switch left down 9 (CTRL 9)

• Channel 10 -> Two-way-switch left down 8 (SW8) -> for lightning e.g.

• Channel 11 -> Rotary poti middle (CTRL 7) -> for parameter e.g.

• Channel 12 -> Button right down (SW 9) -> for triggering the camera e.g.

Example Setting Download

A "ready to use" Setting like above for MODE 2 you can download here: MX-20

After unpacking the downloaded .zip-file, you can copy the folder "Models" directly to the SD-card.
If there is already an folder "Models" / "mx-20" on the SD-card, you can copy the "aMK-Set.mdl" directly into this folder.

How to import/export a setting on the SD-card, you can read in the manual on page 22 + 53/54.

INFO:
In this setting the clock named Stop is activated. Once the throttle stick is moved up the clock starts. If the throttle stick is down, the clock stopps. To set the clock back to zero, you need to push together the up/down button of the right Touch-pads. Or swich off/on the transmitter.

TIPP: If you will use a other Mode as Mode 2, you can use the "ready to use" Setting too.
Load the setting into the transmitter and change the Mode manually.
The sticks will then have the function of the Mode (1,3,4) you set. All other channels/switch are so as in the example.

Check Channels in the KopterTool

You can check the channel assignment in the KopterTool, by using the corresponding switch/poti at the transmitter and observe the amplitude of the signal.

Note:

• The Receiver Type has to be "Graupner HoTT"
• Thereby the telemetry is activated and the correct channel-offset is set.(otherwise the zero-values were at 133 instead at 128)

• If you change the Receiver Type, you have to save this setting into the MikroKopter first to make the changes noticeable.

• The amplitudes of the sticks (Nick/Roll/Gas/Yaw) have to be 127 or 128 in middle-position. If necessary you can adjust it with the trim-buttons (beside the sticks)

Receiver

Receiver GR-12

The GR-12 HoTT is a 6-channel receiver, which you can upgrade to 16 channels via sumsignal (depends on transmitter).

The range is with this receiver according Graupner 2000mtr.

Output for the sum-signal

• "sum-signal" must be activated (see: "Set the receiver to sum-signal").
• The receiver has to be bound to the transmitter (see: "Binding").
• The sum-signal is on output 6.

Telemetry

The receiver has a separate data channel at output 5 for the MikroKopter telemetry:

To receive the telemetry over here, you have to change output 5 first.
For this, press in the main window ESC for 3sec. We see then the following menu:

Now select SETTING & DATA VIEW and change to RX CURVE.
There you change 5CH FUNCTION into SENSOR:

Receiver GR-16

The GR-16 HoTT is an 8-channel receiver, which you can upgrade to 16 channels via sumsignal (depends on transmitter).
The range is with this receiver according Graupner 4000mtr.

Output for the sum-signal

• "sum-signal" must be activated (see: "Binding").
• The receiver has to be bound to the transmitter (see: "Set the receiver to sum-signal").
• The sum-signal is on output 8.

Telemetry

The receiver has a separate data channel at the other side for the MikroKopter telemetry:

Receiver GR-24

The GR-24 HoTT is an 12-channel receiver, which you can upgrade to 16 channels via sumsignal (depends on transmitter).
The range is with this receiver according Graupner 4000mtr.

Output for the sum-signal

• "sum-signal" must be activated (see: "Binding").
• The receiver has to be bound to the transmitter (see: "Set the receiver to sum-signal").
• The sum-signal is on output 8.

Telemetry

The receiver has a separate data channel at the other side for the MikroKopter telemetry:

Connection of the receiver to the FlightCtrl2.1

The receiver is connected with a PPM-cable and a second cable for the telemetry to the FlightCtrl:

• PPM-cable - Black on "GND" (ground)
• PPM-cable - Red on "+5" (Plus)
• PPM-cable - Orange on "PPM" (PPM-datawire)
• Jumper "JETI" has to be bridged.
• Solder the data-wire (for the HoTT-reversed channel) at "RX". Connect this cable to the sensor connector labeled "T" of the HoTT receiver.

As receiver choose "Graupner HoTT" in the KopterTool:

Voice-output

For the voice-output you can plug a customary earphone into the MX-20 HoTT.

With the voice-output the MikroKopter can "tell" its values to the pilot. It simulates the various sensors of the HoTT-System

The output can be retrieved via a switch on the transmitter.

In addition there is:

• Vario-tone -> indicates elevation as tone

• Alerts. "Low voltage" e.g.

Select a sensor

Currently you can select just one of four (simulated) sensors.

Outputs of the Sensors 'General Module'

The sensor "General module" currently shows the most data - therefor its recommended to choose this one.

To set the following values, you have to get back to the window "telemetry" and select the entry "VOICE TRIGGER" at the bottom.
Select it with "SET".
In the window "VOICE TRIGGER" change to "SENSOR" and confirm with "SET".
Now the window with the sensor is open. If you scroll down, the lower display appears.

If you select this menu ("General module"), you can let announce following values:

• Lipo-Voltage
• Temperature of the warmest Brushless-Ctrl
• Temperature of the coldest Brushless-Ctrl
• Height
• Direction
• Speed
• Consumed Lipo-capacity
• Elevation

Summarized values

1. Current LiPo voltage

2. Signal-strength
3. T1: temperature of the coldest Brushless-Ctrl
4. T2: temperature of the warmest Brushless-Ctrl

5. Compass-direction (2.66 -> 266 degrees)

6. Distance to the starting point
7. Lipo-voltage
8. Height
9. Elevation
10. Current
11. Consumed capacity in mAh

12. Home-direction(2.66 -> 266 degrees)

Display voltage and temperature

There are two menus.

• Temperature 1: Temperature of the coldest Brushless-Ctrl
• Temperature 2: Temperature of the warmest Brushless-Ctrl

Display of the capacity and height

• Voltage
• Current
• Consumed mAh
• Height in meters (the displayed unit 'ml' is wrong)

Display of the height

• Height
• Elevation

Display of the distance

Here now the GPS-distance to the starting point will be displayed. The unit 'RMP' is wrong.

The small number beside the bar shows the max. distance.

Outputs of the Sensor 'Electric Air Module'

If you select this sensormodule, following values will be announced:

• Lipo-voltage
• Temperature of the warmest Brushless-Ctrl
• Temperature of the coldest Brushless-Ctrl
• Height
• Direction
• Speed
• consumed Lipo-capacity
• Elevation

Summarized values

1. Lipo-voltage
2. Current
3. Consumed capacity in mAh

4. Compass-direction (2.70 -> 270 degrees)

5. Elevation
6. Signal-strength
7. T1: Temperature of the coldest Brushless-Ctrl
8. T2: Temperature of the warmest Brushless-Ctrl
9. Height

Display of the height

• Height
• Elevation

Display of the Battery

• Voltage
• Current
• Consumed mAh

Output of the sensor 'Vario Module'

If you select this sensormodule, following values will be announced:

• Height
• Elevation

Output of the module 'GPS'

If you select this sensormodule, following values will be announced:

• Distance to the starting point
• Height
• Direction
• Speed

Display of the height

• Height
• Elevation

Summarized values

Adjustment of the spoken values

At the transmitter you can select, what has to be announced. By default it would be spoken too many values, therefore we have to disable most of them:

Sensor Select

The FlightCtrl can 'simulate' different sensors.

• Hold down ESC for about 2 seconds at the transmitter -> then you get into the menu "Telemetry"

• Select "Sensor Select"
• Select desired sensor "General Module" e.g.

Voice Trigger and Vario-tone

• Select Voice Trigger
• Select the menu "TRIG"
• Use desired switch at the transmitter(upper left e.g.)

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Assign a switch for the vario-tone:

If this switch is 'ON', the elevation of the vario-height-regulator will be emitted as tone.

• Tip: If you want the variotone just for the vario-height-regulator, then assign the switch for the variotone to the switch of the height-regulator.

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• Switch to the menu "Transfer"
• Disable all announcements

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• Switch to the menu "Receiver"
• Disable all announcements

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• Switch to the menu "Sensor"
• Select the desired announcements

(Depending on the sensor you have set, you can enable/disable the announcements)

Recall of the spoken values and Bugfix

If you press the corresponding button for the voice-output (like described above), the selected values will be spoken.

Unfortunately the MX-20 transmitter don't retrieve the speech-values of the MikroKopter, when the text-telemetry-display is displayed. Graupner have to change this. This is no problem of the MikroKopter-tool.

If the speech has to be transmitted, leave the text-telemetry with ESC.

Now you can let announce the values by pushing the button.

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If you want to see the text-telemerty, you have to confirm with "SET", to switch to the receiver display.

Attention: If you are in the text-telemetry, no values will be announced.

One exception is the "Low-voltage-warning": The voice-output "low-voltage" appears in every menu.

Text-telemetry

• The MikroKopter has to be turned on, the receiver has to be bound and the Type has to be "Graupner HoTT" in the MikroKopter settings

• Press ESC for about 2 seconds on the transmitter -> you'll get into the menu "Telemetry"

• Select "SETTING & DATA VIEW" (down and SET)

• You get into a menu, which ist generated by the receiver
• Press "UP" once

Alternative:

• Switch to the MK-telemetry by pressing right (6 times)

• If the menu stays on "Servo Test" and no further arrow to the right is displayed, then the receiver don't get telemetry data from the FlightCtrl

• You can't switch back to the receiver menus. Right/Left are switching to the MK-menus

MK-Menüs

Settings Overview

Here you can get a quick overview of the used setting

If Looping or Heading-Hold is activated there will be a warnung at the bottom

Status

GPS-Mode symbol

A symbol shows the actual GPS-Mode:

• - : no GPS possible
• / : Free
• W : Waypoint
• H : Coming Home
• D : Dynamic Position Hold
• P : Position Hold

Vario - symbol

This shows the setpoint of the altitude control. (vario mode only)

• = : no change in altitude
• + : increase altitude
• - : decrease altitude
• ^ : increase (command from NC: (Waypoint))
• v : decrease (command from NC: (Waypoint))

The background of the symbol is black, if the altitude control is activated.

Status temperatures

Errormessages in plain text

In the case of an error, you hear a warning and a text will be displayed:

See also: ErrorCodes

Control-stick without function

It can happen, that on the transmitter the left and the right control-stick has no function in one (or both) direction(s).
It's may be caused by a misadjustment of the stick-calibration.

How can you check this?

Is the calibration of the control-sticks misadjusted or not correct they mostly do not have any level-peak and no function.
To check this you need to switch first to the menu "Servo display". That can be done either way over the menu,
or you push the buttons < > of the left Touch-Button in the same time.

If a control-stick will be moved you will see here a peak of the appropriate channel.
If there is no reaction that specific control-stick is not calibrated.

To calibrate the control-stick you need to open "Hidden Mode".
Into that mode you can switch as follows: On the left Touch-Button hold the arrow-buttons up/down at the same time and push the "SET-Button.

Here you need to choose the entry "STICK CALIBRATION".
After the calibration of the appropriate control-stick you should see under "Servo Display" a function again.

How to do it is also written in the instruction on the pages "28/29/30".

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See also:

• Firmware-0.86

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• KategorieFernsteuerung