©2013-2015 DJI. All Rights Reserved. - 1 -

2.4G Bluetooth Datalink & iPad

Ground Station User Guide V1.14

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. The signal flow is as shown below.

The Air end

The Ground end

Flight control system PC Ground

Station iPad Ground

Station CAN-Bus USB

BBlluueettooootthh Signals from Ground Station Signals from Flight control system BTU module CAN-Bus

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), A2(Firmware V2.0 or above)

Important: To make your Phantom 2 compatible with the 2.4G Bluetooth Datalink, please update the firmware of 

Phantom 2 and BTU module to the latest version. 

1.1 In the box

BTU ModuleUSB 

cable

CAN-Bus 

cable

DC power 

cable

The Ground end of 

2.4G Bluetooth Datalink

The Air end of 

2.4G Bluetooth Datalink

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.
©2013-2015 DJI. All Rights Reserved. - 2 -

1.3 Connections and use

(1) Please assemble the antenna of the Ground end first. 

(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 · Assistant Software of 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.

Distance between the The Ground end two ends should be more than 1.5m

Communication& power supply port

Extra power supply port

· 3S-6S Battery · 9.9V~25.2V DC power -

+

· iPad Ground Station · Assistant of Flight control system

+

-

90o To Flight control system To any CAN-Bus port on ACE ONE, WKM , NAZA-M,NAZA-M V2 Or to the CAN2 port(or the CAN-Bus port on the devices connected to the CAN2 port) on A2 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.
©2013-2015 DJI. All Rights Reserved. - 3 -

1.4 LED Indicator descriptions

The LED Indicators of the 2.4G Bluetooth Datalink will work after power on, the descriptions are shown below.

LED TX/RX LINK

The Air 

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 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.

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.

· 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.
©2013-2015 DJI. All Rights Reserved. - 4 -

iPad Ground Station 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.

2.1 Introduction 

Functions 

Map information display Joystick mode One key Take off/ Go Home

Flight display in real time Single waypoint Auto Landing

Flight simulator Waypoints Customized Waypoints

4 kinds of Route Template Customized Route Template Low voltage alert

Voice guidance function GPS SNR Display

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),A2(Firmware V2.0 or above).

Important: Phantom 2 supports iPad Ground Station V1.4.58. To use the iPad Ground Station with the Phantom 2, 

please update the main controller firmware to V2.00 or above, update the central board firmware to V1.0.1.24 or 

above while the BTU firmware should be updated to V1.0.1.3 or above.

iOS Devices that support the iPad Ground Station 

iPad3,iPad4,iPad mini, iPad mini with Retina display,iPad Air(iOS 6.1 or above)

2.2 First Time Use

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 switch to other mode and 

back to the GPS mode quickly to get the 

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 Default Home point is the one recorded by the aircraft 
©2013-2015 DJI. All Rights Reserved. - 5 -

Home automatically after recording conditions are satisfied control by Transmitter.

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.

2.3 Using Tips

1. Customized Route Template 

In Waypoints mode, users can set a route and click to save it as a template. Users can view all 

the customized route templates in the template menu, slip from right to left on a template and you can 

choose to detele it.

2. Capturing waypoints 

In Waypoints mode, click to capture the aircraft attitude (including longitude, latitude, height and nose 

pointing direction) properties to build a new waypoint during flight. This function is always available when the 

UAV is hovering or flying.

3. GPS SNR Display 

iPad Ground Station has added “SNR Health” and “SNR Fluctuation” index monitors for GPS signals. Pilots 

will be able to monitor GPS signal quality, ensuring they have strong and stable signals for better flight 

performance. By referring to these two values, pilots will be empowered to find the best locations for takeoff 

and flight, while also detecting areas that might interfere with GPS signals.

Click . The SNR interface provides you with “SNR Health” and “SNR Fluctuation” index monitors 

whose values change according to aircraft maneuvers and environmental interference.

 The “SNR Health Index” shows the GPS signal strength captured by the GPS receiver. A larger number 

indicates a stronger GPS signal. We highly recommend pilots only take off when the SNR health value is 

greater than 36.
©2013-2015 DJI. All Rights Reserved. - 6 -

 The “SNR Fluctuation Index” shows the overall stability of the craft’s current GPS signal. A smaller number 

means that the signals will fluctuate less and provide a more stable GPS signal overall.

2.4 Flight Limit of Special Areas

All UAV operators should abide by all regulations from such organizations at ICAO (International Civil Aviation 

Organization) and per country airspace regulations. For safety reasons, key areas have been restricted, such as:

a) Within the radius of 8Km from the airport. 

Users will not be able to build waypoints or Home points in designated special areas and the waypoint routines go 

through these special areas are invalid, and the UAV will fail to cruise to those areas.

All the special areas have been restricted are specified on the DJI official website and please refer to Special Areas 

List (http://www.dji.com/fly-safe/category-gs) to obtain details.
©2013-2015 DJI. All Rights Reserved. - 7 -

Appendix

3.1 2.4G Bluetooth specifications (Deliveries passed FCC)

Performance 

RF Data Rate 1536 kbps

Indoor/Urban Range ≤ 350 m

Outdoor/RF Line-of-Sight Range ≤ 2 km

Transmit Power ≤ 125 mW

Receiver Sensitivity (1%PER) -94 dBm

Power Consumption The Ground end: ≤ 2.3 W The Air end: ≤ 1.8 W

Features 

Frequency Band 2.4 G (2400 MHz ~ 2483 MHz)

Serial Data Rate 115200 bps

Antenna Options SMA

Operating Temperature -10°C ~ +60°C

Size (No Antenna) 

The Ground end: 73 mm x 47.8 mm x 17.1 mm

The Air end: 49.8 mm x 36.4 mm x 11.4 mm

Weight (with Antenna) The Ground end: 93 g The Air end: 32 g

Power supply 

Supply Voltage The Ground end: 9.9 V - 25.2 V The Air end: 6 V

Current (Transmitting signal) 0.18 A @ 12.5 V

Current (Receiving signal) 0.30 A @ 6 V

Regulatory Approvals 

FCC(USA) Yes

3.2 2.4G Bluetooth specifications (Deliveries passed CE)

Performance 

RF Data Rate 1536 kbps

Indoor/Urban Range ≤ 200 m

Outdoor/RF Line-of-Sight Range ≤ 1.1 km

EIRP (Equivalent Isotropic Radiated Power) ≤ 100 mW

Receiver Sensitivity (1%PER) -94 dBm

Power Consumption The Ground end: ≤ 1.3 W The Air end: ≤ 0.9 W

Features 

Frequency Band 2.4 G (2400 MHz ~ 2483 MHz)

Serial Data Rate 115200 bps

Antenna Options SMA

Operating Temperature -10°C ~ +60°C

Size (No Antenna) The Ground end: 73 mm x 47.8 mm x 17.1 mm
©2013-2015 DJI. All Rights Reserved. - 8 -

The Air end: 49.8 mm x 36.4 mm x 11.4 mm

Weight (with Antenna) The Ground end: 93 g The Air end: 32 g

Power supply 

Supply Voltage The Ground end: 9.9 V - 25.2 V The Air end: 6 V

Current (Transmitting signal) 0.10 A @ 12.5 V

Current (Receiving signal) 0.15 A @ 6 V

Regulatory Approvals 

CE(European) Yes

3.3 FAQ

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 1.5 m.

 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.