DragonLink V3 User manual

DRAFT ONLY

Table of Contents
1 Introduction 4
1.1 Overview 4
1.2 Package Contents 5
1.3 Specifications 5
1.4 Software Updates 6
1.4.1 Changelog 6
1.4.2 Known Issues and Limitations 6
1.5 Product Support 6
1.6 Warnings and Safety 7
2 Software Installation 8
2.1 Minimum System Requirements 8
2.2 Obtaining the Latest Software / Firmware 8
2.3 Software Installation 9
2.4 Applying Firmware Updates 11
3 Configuration –DragonLink GUI 13
3.1 DragonLink Transmitter 13
3.1.1 General Settings 13
3.1.2 Channel Mixing / Assignment 15
3.1.3 Power Settings 16
3.1.4 RF Settings 17
3.1.5 Alarms and Sounds 18
3.1.6 Presets 20
3.1.7 External Connections 21
3.2.8 SD Logging 24
3.2.9 RSSI 25
3.2.10 Telemetry Info 26
3.2.11 Spectrum Analyzer 27
3.3 DragonLink Transmitter –Using Menu Button 28
3.3.1 Range Test 28
3.3.2 Bind Mode 29
3.3.3 Servo Test 29
3.3.4 Change Transmitter ID 30
3.3.5 Exit USB Telemetry Mode 30

3.3.6 Set Failsafe Channel Positions 30
3.4 DragonLink Receiver (via Transmitter) 31
3.4.1 RX Failsafe Behaviour 32
3.4.2 Channel Assignment (RX Outputs) 32
3.5 DragonLink Receiver 33
3.5.1 Receiver Outputs 34
3.5.2 General Settings 36
3.5.3 Radio Modem 37
3.5.4 GPS Settings 38
3.5.5 Log Information 39
3.5.6 RSSI 39
3.5.7 Spectrum Analyzer 40
3.5.8 Stabilization 41
4 Installation 42
4.1 DragonLink Transmitter 42

1 Introduction
1.1 Overview
The DragonLink V3 System has been constructed from the best performing, highest quality
components, using the latest and most advanced technology available. This system is built
to outperform everything else on market and will last for many years. It is not cheap, but it
will be the best FPV investment you will make.
Some of the DragonLink V3 features include:
Typical range of more than 60 KM with stock antennas
Full bi-directional telemetry - telemetry range varies with receiver type and data rate
used
Built in serial radio modem
Full MavLink support, works with Tower, Mission Planner, and others
Built in Bluetooth for display of telemetry on any android Smartphone or Tablet
Fully configurable using PC software
Can serve as a lost plane finder using optional GPS hardware and a telemetry-
compatible controller
Easy-to-see multi-color LEDs for instant status monitoring
Audible alarms (for low voltage, low RSSI, etc.)
Logging of flight, position, etc. to Micro-SD card (in development)
RF Spectrum Analyzer
Super-fast update rates available for racers and obstacle flyers
Hassle free, bind-and-fly operation for those that want a basic experience
Fully compatible with existing Dragon Link Micro Receivers (full bi-directional)
The Dragon Link complete system is proudly made in the USA, and is fully guaranteed in the
USA. The system includes everything you need for long range, high performance RC control,
and there is nothing additional to purchase. To get started with the best RC control money
can buy, just order a complete DragonLink system and choose the correct options for your
RC transmitter connection cables and airplane antenna options to suit.
NOTE: FPV video transmission is not a function of the DragonLink System and will
require the purchase of additional equipment.

1.2 Package Contents
“DragonLink V3 Advanced Complete System” package contents include:
1x Long Range V3 Advanced Slim Transmitter
1x Long Range Receiver (Micro or Advanced)
1x Genuine Nagoya Transmitter Antenna
1x High Performance FPVPro Receiver Antenna
1x Connection Cable for Transmitter Module (type included according to selection
made at time of purchase)
This user guide also covers the use of the following optional DragonLink products:
DragonLink Transmitter (non-slim)
DragonLink Advanced (high-power) Receiver
DragonLink 100 amp Current Sensor
DragonLink high-accuracy GPS position sensor
DragonLink Micro OSD
1.3 Specifications
DragonLink V3 Advanced Transmitter (Slim)
Input Voltage
5 –18v (2 –4 cell LiPo)
Operating Frequency
433MHz (frequency hopping in ARS band)
Typical Range
40km (using supplied antennas)
Weight
90g
Length
79mm
Width
60mm
Thickness
15mm
DragonLink V3 Advanced Transmitter
Input Voltage
5 –18v (2 –4 cell LiPo)
Operating Frequency
433MHz (frequency hopping in ARS band)
Typical Range
40km (using supplied antennas)
Weight
150g
Length
86mm
Width
75mm
Thickness
30mm
DragonLink V3 Micro Receiver
Input Voltage
5 –9v (UBEC or 2 cell LiPo)
Operating Frequency
433MHz (frequency hopping in ARS band)

Transmit Power
25mW
Weight
g
Length
52mm (not inc. SMA)
Width
23mm
Thickness
9mm (14mm inc. pin headers)
DragonLink V3 Advanced (high-power) Receiver
Input Voltage
5 –9v (UBEC or 2 cell LiPo)
Operating Frequency
433MHz (frequency hopping in ARS band)
Transmit Power
1500mW
Weight
g
Length
70mm (not inc. SMA)
Width
36mm
Thickness
11mm (14mm inc. pin headers)
1.4 Software Updates
For instructions on how to apply software or firmware updates, please see sections 2.3 and
2.4, respectively.
1.4.1 Changelog
An up-to-date changelog for both firmware and software can be found on the
welcome screen of the DragonLink GUI software.
This is version 1.0 of the DragonLink User Guide.
1.4.2 Known Issues and Limitations
When configuring “External connections” on the Transmitter, assigning the same
function to more than one connection will cause one or more of those
connections to not work.
When using MavLink Decoded telemetry, Mission Planner will endlessly attempt
to retrieve parameters. As this is not possible without a bi-directional telemetry
link, the user will need to click “Cancel” to proceed. This is a limitation of Mission
Planner and not a fault with your DragonLink system.
Elements positioned on the DragonLink OSD within the GUI will not always show
the correct location on the FPV video feed. The OSD is still largely under
development.
1.5 Product Support

Your Dragon Link system is fully guaranteed and we will be happy to repair, test and
upgrade it to the latest firmware free of charge. If you have exhausted the troubleshooting
procedures in section [to be added] at the end of this manual and still have no success
getting your DragonLink system to work, send your transmitter and receiver ONLY (NO
antennas, NO accessories or other items) to us for repair. It is VERY IMPORTANT that you
include a note explaining what is wrong so that we can correctly diagnose your system. Also
remember to include your full name and return address on the note so that it can be sent
back to you.
If you are outside the USA, you can use the cheapest way possible to send it to us in a small
padded envelope, or very small box to keep the postage cost low. The mail is very reliable
and fast in the USA so there is no need to pay extra for express mail, or very expensive
tracking.
Shipping address:
ROSA YSLA
PO BOX 388
CORTARO AZ 85652
USA
Support contact:
[email protected]
1.6 Warnings and Safety
The DragonLink system is for hobby use only, in radio-controlled planes, copters,
boats, and cars. Use of the system for any other than its intended purpose may
cause damage to property, personal injury, or death.
Always observe proper use of the DragonLink system and ensure that all appropriate
safety measures are taken during use and when setting up (eg. when soldering), in
accordance with the user manuals for any other applicable products.
Always observe safety precautions for Lithium Polymer and other battery types.
Improper use of batteries can cause fires, serious burns, and explosions. Never use
or charge a damage or puffed battery.
Always observe local and national laws regarding the use of radio transmitters and
remotely piloted vehicles.
DragonLink and FPVPro will not accept any liability for any loss, fines, or damage that
may result from the use of this system.

2 Software Installation
This chapter outlines the procedures for installing the DragonLink GUI onto a Microsoft
Windows PC and then using the DragonLink GUI to load the latest firmware onto your
DragonLink hardware.
2.1 Minimum System Requirements
Component
Requirement
Computer / Processor
Pentium 4, Athlon 64, or equivalent
Memory (RAM)
2 gigabytes (GB) or greater
Operating System
Microsoft™ Windows™ 7, 8, 8.1, 10
Video
Display with resolution 1024x768 or greater
Internet Connectivity
256kbit/s or faster recommended
2.2 Obtaining the Latest Software / Firmware
It is strongly advisable to check for firmware and software updates regularly as they may
include bug fixes, new features, and performance improvements. Before flying your
DragonLink system for the first time, it is necessary to apply the latest firmware and obtain
the newest version of the DragonLink GUI software for PC.
1. To begin checking for updates, visit this section of the DragonLink website:
http://www.dragonlinkrc.com/instructions/
2. From there, select your applicable DragonLink system:
3. Then select Complete Systems:

4. Lastly, click on the download link near the top:
5. Once the compressed (.zip) has downloaded, extract it by right-clicking the file and
selecting Extract All…
2.3 Software Installation
1. The compressed (.zip) file obtained from the DragonLink website contains the following
files:
NOTE: You will require an internet connection in order to perform the installation
as the installer needs to download additional software components.
2. Double-click the DragonLink_GUI_Setup.exe file to begin the installation of the
DragonLink software. At the prompt, select “Install”.

3. Please wait for the download to complete.
4. Once the installation is complete, the software can be launched from the DragonLink
shortcut on the Start Menu.

2.4 Applying Firmware Updates
Firmware updates can be easily applied to your DragonLink transmitter, receiver, or OSD,
using the DragonLink GUI software.
WARNING: It is important not to interrupt the firmware update process as this
has the potential to cause hardware damage and render your device unusable.
1. First, connect your DragonLink transmitter, receiver, or OSD to your PC using a micro-
USB cable. Ensure the device tab appears in the DragonLink GUI software. It may take a
moment for drivers to install before the tab appears. If it does not appear, please follow
the Driver Installation Troubleshooting guide in section [to be added].
2. Select the relevant tab for the device you wish to update. Then, select the Update page
and click Reboot Hardware in firmware update mode

3. Once the hardware has rebooted you will be presented with the below screen, which
offers a number of firmware options.
-Select “latest beta firmware” if you wish to try out the most up-to-date features
and / or bug fixes.
-Select “latest Stable firmware” if you wish to use the most up-to-date firmware
that is known not to have any major bugs.
-Select “Select and upload file” if you wish to manually specify a firmware file to
upload to your device. (This is used in such instances as when you may wish to
downgrade to a previous version of firmware.)
After selecting one of the options, the software will automatically download the firmware
from the internet (or allow you to navigate to the firmware file and select it), then begin
applying it to your DragonLink device.
NOTE: While every precaution is taken to prevent serious bugs making it into any
version of our firmware, it is possible that ‘beta’firmware may contain bugs
which have the potential to cause the loss of control of your model aircraft. At the
time of writing, no such bugs are known to exist, however please proceed with
the appropriate level of care as DragonLink cannot accept any responsibility for
any damages or the loss of your model aircraft.

3 Configuration –DragonLink GUI
NOTE: After changing settings relating to update-rate, bandwidth allocation, use
of narrow-band, no. of channels, hardware IDs, or the enabling or disabling bi-
directional data, it will be necessary to re-bind your DragonLink transmitter and
receiver.
Saving Settings
Before disconnecting or rebooting your DragonLink device, ensure that any changes to the
configuration are not lost by clicking Save Settings at the bottom of the DragonLink GUI
window. Some pages have additional save buttons –ensure you click these as necessary.
3.1 DragonLink Transmitter
3.1.1 General Settings

ID: This number should be changed to something unique before your DragonLink
system is used for the first time. It is used as an identifier to encode the transmission
data so the receiver does not suffer interference from other DragonLink systems
during flight. Once changed, re-binding with the receiver is necessary.
Firmware version: This field displays the version of firmware currently applied to the
DragonLink transmitter.
Input 1: Specifies the protocol used by the controller to talk to the DragonLink
transmitter. This must match the protocol used by the controller’s trainer jack or
module-bay port.
Use model memory: Enables the use of model memory, which allows switching
between 3 different saved configuration ‘profiles’ so that the settings do not need to
be adjusted manually each time for use with different model aircraft.
When enabled, the desired model can be selected by setting the switch position
before powering on the transmitter (Switch Ex3 on large transmitter, or switch Ex1
on the Slim). Once the transmitter is powered on, the switch can then be used
normally for other functions without affecting the model selection.
Reboot TX: reboots the DragonLink transmitter. Required for some changes to take
effect.
Reset TX to factory settings: Restores all settings back to factory default. A
recommended first-step when troubleshooting the DragonLink system.
Bind: Places the DragonLink transmitter in binding mode. To complete the binding
process once this mode has been activated:
1Power on the DragonLink receiver. The receiver’s blue and green LEDs should
flash alternately, indicating a successful bind.
2Power off the receiver and reboot the transmitter.
3The receiver’s blue LED should now be lit, indicating a successful link to the
DragonLink transmitter. The transmitter’s LED(s) will not be lit unless connected
to an external power source.
Load Model 1 –3: These buttons switch between saved model configurations.
Before changing to another Model, ensure settings are saved as any unsaved
changes will be lost.

3.1.2 Channel Mixing / Assignment
The Channel Mixing settings page allows you to map channels from your controller,
as well as the DragonLink transmitter’s switches or the rotary pot (large transmitter
only), to any of the 12 channels on the DragonLink system. In addition, the sliders to
the right of each channel show the position of each channel, live, so you can confirm
their functionality without needing the receiver or additional hardware connected.
CH 1 –12: The drop-down menus on this screen allow you to assign an input to each
of the 12 channels that the DragonLink transmitter communicates to the receiver.
The available options for each channel include:
Channels 1 –12 from Input 1
Channels 1 –12 from Input 2*
Switch 1 (Ex1)
Switch 2 (Ex3)*
Rotary pot (Ex2)*
Voltage

*not available on DragonLink V3 Slim transmitter
NOTE: Configuration of the receiver is also required in order to complete
the channel mapping / mixing setup. See chapter 3.5.
Assigning voltage to a channel will cause that channel’s position to move in
conjunction with the DragonLink transmitter’s input voltage. This could, for example,
be used by the model aircraft to display an indication on the OSD of the transmitter’s
voltage, or for an RTL mode to be set based on low TX voltage, or for a physical servo
to perform some function once the TX battery reaches a certain level.
The channel will move from minimum to maximum positions based on a voltage
range of approximately 5v –16v.
3.1.3 Power Settings
The DragonLink transmitter’s RF output power can be controlled automatically or set
to a fixed milli-watt value manually by the user.

NOTE: Auto mode increases the RF power as-needed in order to maintain
a stable RC link and reduces it when not needed to maintain efficiency. It
does so very quickly –far quicker than the user could adjust it manually –
and in much finer increments. For this reason, Auto is the recommended
mode.
Low: sets the transmit power level when the switch, RC channel, or rotary pot is in
the lower third of the channel range
Mid: sets the transmit power level when the switch, RC channel, or rotary pot is in
the middle third of the channel range
High: sets the transmit power level when the switch, RC channel, or rotary pot is in
the upper third of the channel range
Power switch: Defines the switch, RC channel, or rotary pot that will be used to alter
the transmit power.
At the time of writing, there is no option to remove the assignment of a switch or RC
channel to the power setting, however, if the low, mid, and high settings are all set
to Auto (or an identical fixed value), the settings on this page will have no effect. In
addition, the assignment of a switch or channel here will not prevent it from being
assigned to other functions elsewhere.
3.1.4 RF Settings
The RF settings page controls how the DragonLink transmitter talks to the receiver.
Changing these settings can affect the control range and telemetry range, as well as
the responsiveness of control over the model aircraft. For example, lowering the

number of channels sent to the receiver will improve the responsiveness, while
decreasing the bi-directional bandwidth and lowering the update rate to its
minimum setting will greatly increase the range at which telemetry can be received.
At the bottom of the page, the approximate update rate (hertz) is displayed, along
with the radio modem’s uplink and downlink data rates (bytes per second). These
values can be used to gauge the effect that changing the settings will have.
In real-world usage situations, any gain to be had by lowering the number of
transmitted channels or bi-dir bandwidth will be marginal, and may result in
compromised performance. Only lower these settings below ‘normal’ in cases where
extreme range and link stability are required.
NOTE: MavLink telemetry streams require a relatively high data rate.
Without altering the configuration of the flight controller, MavLink
typically only works with ‘bidir bandwidth’ set to ‘High’ and ‘RF
preference’ set to ‘Fastest update-rate’.
RF Band: [to be added]
Use bi-dir: Enables or disables bi-directional communication between the
transmitter and receiver. Disabling this setting will disable all telemetry and radio-
modem functionality.
Trans. channels: Specifies how many channels to transmit to the receiver.
Bidir bandwidth: Specifies how much bandwidth to allocate to bi-directional
communication. Maximum value is required for stable MavLink.
RF preference: Specifies how rapidly to update the channel positions.
Use narrowband: Effectively uses half the normal bandwidth, allowing much tighter
internal RF filters for a cleaner signal.
3.1.5 Alarms and Sounds

The DragonLink transmitter is capable of providing a range of audible warnings to the
user.
Missing PPM: Triggered by a loss of input from the radio controller’s trainer jack or
module bay connection.
Low TX voltage: User-configurable low input-voltage alarm.
Low flight voltage: Triggered by low voltage reading from optional DragonLink Voltage
Sensor (requires active telemetry link).
Low RX RSSI: User-configurable low signal strength alarm.
Change power level: Either one, two, or three beeps will be played to correspond
with the selection of either low, mid, or high power levels, respectively. When using
Auto power level modes only, disabling this alert is recommended (see section
4.1.3).
Micro Power mode*: Plays a repeating audio reminder while the transmitter is in
micro power (range test) mode.
Servo test mode*: Plays a repeating audio reminder while the transmitter is in servo
test mode.
Bind mode*: Plays a repeating audio reminder while the transmitter is in bind mode.
* It is recommended that these reminders be enabled to ensure the model aircraft is
not inadvertently launched while the transmitter remains in a mode that may cause
loss of control or damage.

3.1.6 Presets
The Presets page can be used to apply a range of configuration templates to your
DragonLink transmitter. These won’t alter general settings, such as channel and
switch assignments, model ID, or alarms, however it will alter settings to do with bi-
directional data, update rate, and bandwidth in order to optimise performance for
the use-case determined by the preset. After applying a preset, it will be necessary
to check all of the settings to confirm they are suitable.