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Flight control systems that support the 2.4G Bluetooth Datalink
ACE ONE（Firmware V4.02 or above）, WKM（Firmware V5.24 or above）,
NAZA-M, NAZA-M V2（Firmware V4.00 or above，coming soon）
2.4G Bluetooth Datalink
LK24-BT
Thank you for purchasing DJI products. Please strictly follow this user guide to mount and connect the 2.4G
Bluetooth Datalink, install the Assistant Software on your computer, as well as the App on your mobile device.
Note：The map of Mainland China download from Mainland China IP addresses has differences with the actual
geographic environments. If users download the map of Mainland China from foreign IP addresses, which will be
more accurate.
2.4G Bluetooth Datalink
The 2.4G Bluetooth Datalink consists of the Air end and the Ground end, which provides reliable and stable remote
wireless transmissions for Ground Station based applications. When connecting a DJI BTU module to the Ground
end via a CAN-Bus, the Ground end can communicate with other devices via Bluetooth wirelessly. The signal flow is
as shown below.
Flight control
Flight control
system
system
CAN-Bus
CAN-Bus
1.1 In the box
The Air
The Air
end
end
Signals from
Ground Station
Signals from Flight
control system
The
The
Ground end
Ground end
USB
USB
CAN-Bus
CAN-Bus
PC Ground
PC Ground
Station
Station
BTU Module
BTU Module
Bluetooth
Bluetooth
iPAD Ground
iPAD Ground
Station
Station
The Ground end of
The Ground end of
2.4G Bluetooth
2.4G Bluetooth
Datalink
Datalink
The Air end of
2.4G Bluetooth
Datalink
BTU
Module
CAN-Bus
cable
USB
cable
DC power
cable
Ground Station
Installer CD for
Important：the firmware of BTU should be upgraded to version 1.0.1.2 or above to use with the 2.4G Bluetooth
Datalink.
1.2 User supplied
To use the 2.4G Bluetooth Datalink and Ground Station, please prepare the Flight control system, the aircraft,
batteries, PC or iPAD etc.
1.3 Connections and use
(1) Please assemble the antenna of the Ground end first.
©2013 DJI Innovations. All Rights Reserved. - 1 -
PC
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(2) For connections and use please refer to the diagram below.
Antenna
The tail of the Antenna
should be pointed
downward and
unobstructed to ensure the
communication distance.
· PC Ground Station
· 2.4G Bluetooth Datalink
Assistant Software
· As si st ant Soft wa re o f
Flight control system
USB port
Connect to a PC via a
USB cable to use the
PC Ground Station or
configure the 2.4G
Bluetooth Datalink in
the Assistant Software.
CAN-Bus port
Connect the BTU
module when using the
iPAD Ground Station
DC power port
Connect DC power, you
can choose one of the
USB power supply or DC
power supply to provide
power for the Ground
end.
The Ground end
Distance between the
two ends should be
more than 1.5m
Co mm un ic ati on &
power supply port
Ex tra pow er
supply port
· 3S-6S Battery
· 9.9V~25.2V
DC power
-
+
· iPAD Ground
Station
· Assistant of Flight
control system
+
-
90
o
To Flight control system
To any CAN-Bus port on ACE
ONE, WKM , NAZA-M，
NAZA-M V2
The Air end
Antenna
The tail of the Antenna
should be pointed
upwards and
unobstructed to ensure
the communication
distance.
Notes：
(1) You can configure the Flight control system using the Assistant software on a PC or iOS mobile Device
wirelessly over the link of the 2.4G Bluetooth Datalink, however you cannot upgrade the firmware of
the Flight control system using this communication route.
(2) When connecting a BTU module or a LED Bluetooth unit to the Flight control system to configure in
the Assistant on mobile devices, as well as connecting a BTU module to the Ground end to use the
iPAD Ground station, the two Bluetooth communication links will not interfere with each other.
(3) If the Air end is changed to connect to a new Main controller, you should power cycle the Ground end.
(4) Make sure the LED indicator of BTU module is green after power on, for specific usage details please
refer to the BTU Manual.
(5) For usage of the PC Ground Station please refer to the latest Ground Station User Manual.
Important :
(1) If there are obstacles between the ground and air ends then the radio signal of the 2.4G Bluetooth
Datalink will be weak; please make sure the antennas are always visibly unobstructed during the flight.
Human body, trees, buildings or hills will disconnect the link between the Air end and the Ground end.
(2) Make sure the antenna of the Air end is pointing down, and the antenna of the Ground end is pointing
upwards; it’s better to put the Ground end at a high place to get further transmission distance.
(3) When using the ACE ONE Flight control system with the 2.4G Bluetooth Datalink, the Ground Station
will connect to the Main controller 15s after power on.
©2013 DJI Innovations. All Rights Reserved. - 2 -
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1.4 LED Indicator descriptions
LED
TX/RX
LINK
The Air
end
LINK
TX/RX
Green blinks
Sending
Solid Green
The Air end links with the
Ground end successfully
Red blinks
Receiving
Solid Red
The Air end delinks with the
Ground end
Yellow blinks
Searching the
Main controller
The
Ground
end
TX/RX
LINK
Green blinks
Sending
Solid Green
The Air end links with the
Ground end successfully
Red blinks
Receiving
Solid Red
The Air end delinks with the
Ground end
Yellow blinks
Power voltage of
the Ground end
is less than 9.9V
Notes :
(1) LED Indicators on both ends will blink when powering on, then the TX/RX indicator of the Air end will
blink when searching the Main controller.
(2) The LED Indicators of LINK on both ends should be solid green to indicate that the two ends have linked
successfully.
(3) It’s recommended to check the power voltage of the Ground end regularly when using batteries for
power supply, in order to avoid over-discharging.
· 2.4G Bluetooth
Datalink Assistant
software
To upgrade the Air end
and the Ground end
To upgrade the Ground
end and BTU module
· 2.4G Bluetooth
Datalink Assistant
software
Important : POWER CYCLE the Flight control system and 2.4G Bluetooth Datalink after upgrade.
The LED Indicators of the 2.4G Bluetooth Datalink will work after power on, the descriptions are shown below.
1.5 Upgrade
Use the 2.4G Bluetooth Datalink Assistant software to upgrade the 2.4G Bluetooth Datalink and BTU module.
Please refer to the diagram below to connect when upgrading.
©2013 DJI Innovations. All Rights Reserved. - 3 -
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iPAD Ground Station App
Flight control systems that support the iPAD Ground Station
WKM（Firmware V5.24 or above）, NAZA-M, NAZA-M V2（Firmware V4.00 or above，coming soon）
iOS Devices that support the iPAD Ground Station
iPAD3，iPAD4，iPAD mini（iOS 6.0.1 or above）
Functions
Map information display
Joystick mode
One key Take off/ Go Home
Flight display in real time
Single waypoint
Auto Landing
Flight simulator
Waypoints
4 kinds of Route Template
Voice guidance function
Low voltage alert
First time use
Tips and Notes
1. Open your iPAD and search “DJI” in the App Store to download and
install the Ground Station(GS) App.
2. Open the Bluetooth function of your iPAD.
There will have popups if you forget to
enable the Bluetooth
3. Connect the 2.4G Bluetooth Datalink and BTU module to the Flight
control system, power on.
Please refer to the Datalink part to
connect
4. Run the GS App, create an account through the Internet and login.
PC account is available to login.
5. The GS will search your Main controller and named with“NEW”, you will
be asked to set a new name and a password for the Main controller.
LED in GS indicates after the GS is
connected with the Main controller
6. Please read the tips text carefully after login. Open the FisrtUse function
to make use of the help text.
FisrtUse function can be opened and
closed in“More“ “Settings“
7. Enable the Flight Simulator and try out the follow functions:
(1) Flight Simulator can be opened and
closed in“More“ “Settings“
(2) When using the GS the Flight control
system will enter into GPS control mode and
the aquired satellites shoule be more than 6.
(3) In GPS control mode the GS control
priorto the Transmitter, Users can toggle
the control mode swith to other mode and
back to the GPS mode quickly to get the
control by Transmitter.
Joystick
Use the sticks on the screen to control the aircraft
Single waypoint
Edit a single waypoint and go
Waypoints
Use the templates to set routes, batch the
waypoints and upload the routes, then confirm and go
Location
Use to locate the aircraft or the iPAD
Auto Landing
The aircraft will land slowly
One key Go
Home
Default Home point is the one recorded by the aircraft
automatically after recording conditions are satisfied
8. Disable the Flight Simulator and power cycle the Flight control system to
start real flights. Click on Joystick and you can use One key Take off to take
off your aircraft
(1) Please view the map of fight fields via
Internet in the GS before outdoors flights,
then the maps can be used off-line.
(2) Please use the GS for real flights after
you are familiar with its use and functions,
Refer to all help text in the App.
The iPAD Ground Station is designed for remote flight control in applications of surveillance, aerial photography,
etc., it should be used with the 2.4G Bluetooth Datalink to achieve auto flight after the setting of the routes. The
application with easy usable design offers great portability and simple operation, which will provide users with an
extraordinary flight experiences.
©2013 DJI Innovations. All Rights Reserved. - 4 -
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Appendix
Performance
RF Data Rate
1536kbps
Indoor/Urban Range
≤350m
Outdoor/RF Line-of-Sight Range
≤2km
Transmit Power
≤125mW
Receiver Sensitivity (1%PER)
-94dBm
Power Consumption
The Ground end: ≤2.3W The Air end: ≤1.8W
Features
Frequency Band
2.4G(2400MHz ~2483MHz)
Serial Data Rate
115200 bps
Antenna Options
SMA
Operating Temperature
-10°C ~+55°C
Size (No Antenna)
The Ground end: 73mmx47.8mmx17.1mm
The Air end: 49.8mmx36.4mmx11.4mm
Weight (with Antenna)
The Ground end: 93g The Air end: 32g
Power supply
Supply Voltage
The Ground end: 9.9V-25.2V The Air end: 6V
Working Current (The Ground end)
0.18A@12.5V
Working Current (The Air end)
0.30A@6V
Regulatory Approvals
FCC（USA）
Yes
Performance
RF Data Rate
1536kbps
Indoor/Urban Range
≤200m
Outdoor/RF Line-of-Sight Range
≤1.1km
Transmit Power
≤65mW
Receiver Sensitivity (1%PER)
-94dBm
Power Consumption
The Ground end: ≤1.3W The Air end: ≤0.9W
Features
Frequency Band
2.4G(2400MHz ~2483MHz)
Serial Data Rate
115200 bps
Antenna Options
SMA
3.1 2.4G Bluetooth specifications(Deliveries passed FCC)
3.2 2.4G Bluetooth specifications(Deliveries passed CE)
©2013 DJI Innovations. All Rights Reserved. - 5 -
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Operating Temperature
-10°C ~+55°C
Size (No Antenna)
The Ground end: 73mmx47.8mmx17.1mm
The Air end: 49.8mmx36.4mmx11.4mm
Weight (with Antenna)
The Ground end: 93g The Air end: 32g
Power supply
Supply Voltage
The Ground end: 9.9V-25.2V The Air end: 6V
Working Current (The Ground end)
0.10A@12.5V
Working Current (The Air end)
0.15A@6V
Regulatory Approvals
CE（European）
Yes
2.4G Bluetooth Datalink Failure
The Ground Station fails to connect with the Main controller, please check the following items
The distance between the two ends of the 2.4G Bluetooth Datalink should be more than 1.5m.
Make sure the Ground end is connected correctly and the LED indicator of BTU is green.
If above are ok please power cycle, while this problem continues after powering cycle, there may be hardware
problems such as the Antenna is broken, please contact your authorized dealer.
When using the device, ensure that the antenna of the device
is at least 20cm away from all persons.
3.3 FAQ
3.4 Statements
FCC statement:
This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment.
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this
device may not cause harmful interference, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
NOTE: The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications
or changes to this equipment. Such modifications or changes could void the user’s authority to operate the
equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help.
CE statement
Due to the used enclosure material, the devices shall only be connected to a USB.
Interface of version 2.0 or higher. The connection to so called power USB is prohibited.
Hereby, SZ DJI TECHNOLOGY CO. LTD declares that this device is in compliance with the essential requirements
and other relevant provisions of Directive 1999/5/EC.
©2013 DJI Innovations. All Rights Reserved. - 6 -
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