CUAV HackLink User manual

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Contents
HackLinM manual
1.1
Summary
1.2
System frame diagram
1.2.1
Functional interface definition
1.2.2
Technical specifications
1.2.3
Default connection password
1.2.4
Initial installation
1.3
In connection with the PixHack flight control
1.3.1
Test whether the communication is normal
1.3.2
Extended HDMI display
1.3.3
Re transmission by ground remote control
1.3.4
Software application
1.4
CUAV Hfight
1.4.1
3DR SOLO
1.4.2
Mission Planner
1.4.3
QGroundControl
1.4.4
Appendix
1.5
pairing and restoring system
1.5.1
Detailed annotation on OLED display
1.5.2
Frequently asked questions FAQ
1.5.3

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CUAV HackLink Quick start and Development Guide
Revision record：
A version release finished in 2017-2-6.

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Summary
HackLink --a UAV digital link system with integration of HD graphics and data transfer
Support 720P HD video transmission and MAVLINK protocol, as well as PPM & SBUS remote signal forwarding
The realization of a link system can be on real-time HD video backhaul, UAV data interaction and the real time control of UAV
Dual Mino technology, standard omnidirectional antenna distance 3KM, and 2.4G or 5.8G channel can be selected according to
requirements.
Use NXP high performance IMX6 processor for running LINUX system, suitable for second development (Compatible with 3DR
SOLO development environment).
The ground station terminal built-in OLED screen can display flight related state.
HDMI output, it can be connected to the HDMI display and HDMI video glasses
System frame diagram
Functional interface definition Ground end interface definition:

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Aircraft end interface definition:
Technical specifications
-
-
Communication distance
2-3KM ideal environment omnidirectional antenna
Effective isotropic radiated power（EIRP)
500MW
Receiving sensitivity（1°%PER)
-95dbm
Working frequency
2.4Ghz or 5.8Ghz (optional for purchase)
Antenna gain (airborne) UFL interface
2.0dBi
Antenna gain (ground side) SMA interface
5.0dBi
Working environment and physical parameters
AIR airborne working voltage and current
5.0+-0.2V2A max
GR ground station charging voltage
5.0+-0.2V
GR ground station operating current
2.1A max
GR ground station built in battery capacity
3.6V3105mah
GR ground station OLED display resolution
white light 128 X64
Operating temperature range
-10〜50°c
Dimension
Airborne terminal：75mm(length）x45mm(width）x45mm(height）
GR：80mm(length) x45mm(width) x25mm(height）
Weight
AIR：60g
GR：150g
Video input / output application equipment
Video input format
HDMI:720P

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Default WIFI SSID and password
Default WIFI SSID:HackLink_XXXXXX ( Last 6 digit of MAC address, Automatic generation ）
Default password：cuavhlink
Supporting camera
GOPRO3 GOPRO4 ant motion camera and other HDM cameras
Video output
MICRO HDMI720P30P
Support equipment
HDM input display or video glasses
Remote signal input and output
Ground station support remote control signal standard
SBUS &PPM automatic recognition
Aircraft remote control signal output
DSM

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HackLink Initial installation
At present, only the PixHack or PixHawk wiring is optional , other mavlink flight may need to change the line
In connection with the PixHack flight
1. Insert the data interface of HackLink aircraft terminal in the RADIO transmission interface.
2. Supporting DC-DC module for power supply (support 2-7S battery)
3. Then insert the DSM remote control signal into the DSM interface of the flight control
Notes：
1. If the ground is not connected to the remote control or receiver, do not plug the DSM interface
2. If the flight control is connected to the receiver, do not insert the DSM interface simultaneously.

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In connection with the PixHawk flight
•Insert the HackLink data interface end into the teleml or telem2 transmission interface of the flight control
• Then insert the DSM remote control signal into the DSM interface of the flight control
Notes：
1. If the ground is not connected to the remote control or receiver, do not plug the DSM interface
2. If the flight control is connected to the receiver, do not insert the DSM interface simultaneously.
Connect camera
• HackLink compatible with HDMI output, and the 720P signal camera is required.
• Please turn off the camera's WIFI function before installation to avoid interference.
• Insert the attached MICRO HDMI soft line into AIR side micro HDMI interface
• The other end is inserted into the camera's Micro HDMI interface
Note：The current standard HDMI line for double micro HDMI interface. Other interfaces require additional purchases.
Test whether the communication is normal
1. Connect HackLinkAIR with flight control, then power on. Wait for the start light (blue) flashing and the wireless status light
always bright (green).
2. Open the HackLink ground power supply (long press the power button 5 seconds), the system will boot, probably system
startup success in 30s, the screen will display waiting.
3. Wait, and the AIR end blue light will become bright
4. The ground screen display control data (voltage mode and signal state) mavlink
5. The normal boot on the ground and the successful connection OLED display flow chart

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i. After both ends powered on, aircraft end blue start status lights will flash, it indicates that the connection has not been
successfully connected to the ground, at this time , pairing is needed.
ii. After both ends powered on, the AIR end blue light has become bright, but ground side OLED does not show flight
data, but waiting mavlink, there is maybe problem in aircraft flight control terminal and communication,
check the connection line and control settings (try to open the Telem control for setting).
How to connect a mobile phone or a computer, please refer to the software applicaion part.
Extended HDMI display
HackLink ground terminal connects HDMI display or video glasses
HackLink ground end has a HDMI extended output interface, in theory, it can support any HDMI display or video glasses
Its output format ：30P Resolution 30P
Use the HDMI line to connect the HackLink ground to the monitor, which can be used to display HD videos.
Trouble shooting：

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1. APP display normal, HDMI display can not be displayed properly
Solution: activate the camera again; if nothing is displayed, check the HDMI display connection line
2. Both APP and HDMI can not be displayed
Solution: check the camera settings, set the 720P output, it is also possible that the camera is not compatible
Re transmission by ground remote control
HackLink ground access remote control signal
HackLink remote control re transmission
Access remote signal in HackLink GR RCIN, the DSM signal will be output to flight control by AIR
Support two standard remote control signals (SBUS and PPM), the two standards can be automatically identified, no need to set.
Note: the novice shall cautiously use this function, if the aircraft is not adjusted to the desired state, do not use the remote control
re transmission function, so as to avoid the blast situation.
Advantages：
1. No receiver is needed on the plane
2. uniformity in distance and digital link
3. No co frequency interference problem
4. Disadvantages：
1. After the signal is lost, there is a certain reconnection time between the aircraft and the ground station
2. Add a certain delay

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Software application
Compatible software
Currently HackLink support software are as follows
Computer terminal：
•Mission P 丨anner Unable to view video stream, used for digital transmission only）
•QGroundControl Video streams and data can be viewed interactively, but because of the QGC video decoder, the
video is not fluent）
Android：
•CUAV Hfight CUAV official ground station, you can upgrade and set up operations）Recommended
•3DR SOLO（Unable used directly, then wifi SSID needs to be changed as s〇i〇Link_xxxxxx )
•QGroundControl Video streams and data can be viewed interactively, but because of the QGC video decoder, the
video is not fluent）
Apple ：
•3DR SOLO Unable to be used directly, the wifi SSID needs to be changed as...）
Download: Apple store search 3DR SOLO

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CUAV Hfight
CUAV Official ground station
Download at：http://fw.cuav.net/apk/
System requirements: Android 4.4 or more
Connect ground station via WIFI
1. Download and install Android earth station
2. Digital link connecting flight control, aircraft powered on and ground end boot
3. Search HackLink_xxxxxx, pass password and connected
4. open CUAV Hfight software

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5. Select UDP, click connection
6. After the connection is successful, you can see the video and flight
data
7. Click on the video window to switch to the large screen display

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Change WIFI SSID and password
1. open the sidebar →system interface
2. _XXXXXX
3. Popup dialog
If only changing password, you can type a password in the password box (more than 8 digits)
If you modify the SSID, you can change the name, no need to add the HackLink_ prefix, the software will automatically
identify and add
M o d i f y S S I D , u s i n g 3 D R S O L O s o f t w a r e
If you need to change the SoloLink_ prefix, type SoloLink_123456 in the dialog and confirm.

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Upgrade the ground side MCU program
1. Get version information
〇Use the ground station to connect the digital link
〇Click on the sidebar→system options
〇The ground station will show that the information is updated successfully
〇Then disconnect WIFI and switch to the network connection
2. Get a new version of the file from the Internet
〇When a new version is available, a new version is available for download
〇Click on the corresponding option to download the latest version to the local cache of the phone

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3.Update MCU program to digital link
〇Switch to Hacklink digital link WIFI network
〇Open the sidebar→system options
〇After the program is downloaded to the phone cache, you can see the prompt version can be updated
〇Click on SCM options
〇Update now?
〇Click confirm, APP will update the firmware file to the digital link folder
〇Then prompted to restart, the system will reboot after confirming, when system restarts, the MCU will be updated.
Upgrade system
1.Get version information

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Upgrade system needs to meet two conditions
i. ground terminal power above 30% (more than 50%)
ii. aircraft and the end of the ground has been normally matched
〇Use the ground station to connect the digital link
〇Click on the sidebar→system options
〇The ground station will show that the information is updated successfully
〇Then disconnect WIFI and switch to external network connection
2.Get a new version of the file from the Internet
〇When a new version is available, it is available for download
〇Click on the system version (version available) option
〇Pop-up dialog box to download the system version, then download it (System is relatively large, it may take some time to
download).

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3. update system to digital link
〇Switch to Hacklink digital link WIFI network
〇Open the sidebar→system options
〇After the program is downloaded to the phone cache, you can see the prompt version can be updated
〇Click on the system version (version update) option
〇Update now?
〇confirm, and APP will update the firmware file to the digital link folder

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〇Then prompted to restart, the system will reboot after confirming, when system restarts, the MCU will be updated.

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Use QGC to connect HackLink
QGroundContro is a cross platform ground station software, including Windows version, Android version, apple version,
etc.
Because it is compiled from the same set of code, so the operation is almost the same, the difference is relatively small, thus, this article
only explain the use methods of Windows version and Android version
Windows :
1.Install and connect network
Before the connection, please ensure that the HackLink is normal and flight control has powered on
If not, check the hardware connection - the initial installation
Download at：
https://s3-us-west-2.amazonaws.com/qgroundcontrol/latest/QGroundControl-installer.exe
2.use the network connected to HackLink
3.Install and open QGC software
HackLink is used in UDPMavlink data broadcasting, as long as in the same network, open the QGC software will automatically
connect to the flight control.
The following describes a new connection to allow the QGC to get the video stream

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1 . Enter the comm links option, ADD will add a new link
2. Host address: 10.1.1.1
port: 5502, click OK.