SIYI AK28 User manual

AK28 User Manual V1.0
2019 SIYI Tech All Right Reserved
AK28 ANDROID SMART CONTROLLER
USER MANUAL
V1.0
Sep 2019

AK28 User Manual V1.0
2019 SIYI Tech All Right Reserved
Thank you for purchasing SIYI Technology’s product.
With iUAV OS, a customized drone operating system powered by Android, AK28 is born to
promote UAV application to an easier, more efficient and more stable level. The new controller
integrated with long-distance datalink and videolink comes with an HD FPV camera. And it is
designed and manufactured with the waterproof and dustproof ability on the industrial level for
drone operations in extreme circumstances.
Through digital video transmission, AK28 receives from the drone the real-time FPV and has a
capability to deal with the information in the screen display using its powerful operating system,
which finally helps pilots control and understand their drones in a good way. AK28 makes itself a
perfect combination of UAV remote control and communicating technology on both hardware and
software. Moreover, by providing an opening SDK to global users, we believe that AK28's
potential can be infinite as their ideas are accomplished on the exciting platform!
To maintain a safe and orderly public space and to ensure you a good using experience of AK28
transmitter, please read this manual carefully. If you have any issue using the product, please
consult the manual or check online pages of AK28 on SIYI Technology’s official website
(http://www.siyi.biz). You can also inquire our after-sale service coordinator ([email protected]).

AK28 User Manual V1.0
2019 SIYI Tech All Right Reserved
CONTENT
1 READ TIPS...............................................................................................................................................................1
1.1 Icon Definition....................................................................................................................................................1
1.2 Flight Safety .......................................................................................................................................................1
1.3 Precautions on Charging AK28..........................................................................................................................3
1.4 Precautions on Using SD Card...........................................................................................................................4
1.5 SIM Card Using Manual.....................................................................................................................................5
1.6 Precautions on Storage/Carrying/Recycling.......................................................................................................5
2 PRODUCT INTRODUCTION .................................................................................................................................7
2.1 Product Features.................................................................................................................................................7
2.2 Parts....................................................................................................................................................................9
2.2.1 At a Glance..................................................................................................................................................9
2.2.2 Button/Switch Types and the Default Channel Definitions.......................................................................10
2.3 Technical Specification ....................................................................................................................................12
2.4 Packing List......................................................................................................................................................14
2.5 AK28 Common Diagram..................................................................................................................................16
2.6 Transmitter LED Indicator Definitions ............................................................................................................17
3 GET READY TO USE AK28.................................................................................................................................18
3.1 How to Place Transmitter Antennas Right.......................................................................................................18
3.1.1 Good Antenna Angle of Transmitter.........................................................................................................20
3.1.2 Good Antenna Angle of Sky Station.........................................................................................................21
3.2 How to Charge AK28 Transmitter ...................................................................................................................22
3.3 How to Link/Bind AK28 Transmitter to VD32 Sky Station............................................................................24
3.4 Throttle Joystick Type......................................................................................................................................26
4 OPERATING SYSTEM..........................................................................................................................................27
4.1 Tips...................................................................................................................................................................27
4.2 Download System Application.........................................................................................................................27
4.3 How to Import Files and Install System Application .......................................................................................27
5 SIYI TX...................................................................................................................................................................29
5.1 Channel Settings...............................................................................................................................................29
5.1.1 End Point...................................................................................................................................................29
5.1.2 Middle Point..............................................................................................................................................30

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5.1.3 Channel Reverse........................................................................................................................................31
5.1.4 Channel Mapping ......................................................................................................................................32
5.2 Datalink Settings...............................................................................................................................................33
5.3 System Settings.................................................................................................................................................34
5.4 Model Settings (One Move to Do Agricultural Drone Settings)*....................................................................35
5.5 Fail-safe............................................................................................................................................................36
6 VD32 SKY STATION ............................................................................................................................................38
6.1 At a Glance.......................................................................................................................................................38
6.2 Datalink Connection with FC...........................................................................................................................39
6.3 Datalink Connection with Ground Station .......................................................................................................39
6.4 Videolink Module.............................................................................................................................................40
7 Firmware and Voice Upgrading..............................................................................................................................41
8 After-sale Service....................................................................................................................................................42
10.1 To-be-repair Procedure...................................................................................................................................42
10.2 After-sale Policy.............................................................................................................................................42
10.1.1 7-Day Return & Refund...........................................................................................................................42
10.1.2 15-Day Replacement ...............................................................................................................................44
10.1.3 1-Year Warranty Repair ..........................................................................................................................45

AK28 User Manual V1.0
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1 READ TIPS
1.1 Icon Definition
Please pay more attention to content indicated with the following marks:
DANGER Dangerous manipulation probably leads to human injuries.
WARNINGWarnings on manipulation possibly leads to human injuries.
CAUTION Cautions on what manipulation may lead to property loss.
Prohibited Mandatory Mark
1.2 Flight Safety
AK28 Android Smart Controller is designed for professional application in specific
industries, users who a.pproaches to the device should have at least the basic
ability to manipulate it. Any irregular or irresponsible manipulations of the device
may cause damages and lead to property loss or human injuries. Non-adult users
must follow their trainer’s guidance or the supervision of any adult. Disassembling
or modification on the AK28 transmitter is prohibited without the permission from
SIYI Technology.

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To maintain a safe and orderly public space and to ensure you a good using
experience of SIYI’s products, please read the prohibited and mandatory terms
carefully:
Do not useAK28 transmitter to control an aircraft in places of intensive crowd (squares,
parks), places of many obstructions (streets, parking lots), fields of strong magnetic or
interference (power/radar stations, railways) or any other fields that may cause property loss
or human injuries.
Do not hold or cover transmitter antenna or obstruct transmission by any mean in a
flight.
Do not point directly to your aircraft with the sky station antennas’ upper end in a flight.
Do not fly an aircraft when you are tired, drunk, sickness or in any occasion without a
good feeling.
Do not fly an aircraft when it is rainy, windy or at night.
Do not power off the transmitter in a flight while the aircraft engine and motors are still
working.
Keep the aircraft within sight range in a flight.
Make sure AK28 transmitter’s screen menu is back to system menu before taking off a
flight, in case of any accident caused by mistouching to system settings.
Do not forget to check both battery levels of the transmitter and the sky station before
flying an aircraft.

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Before finishing flight, power off the aircraft first, then the transmitter.
Before doing any setting or adjustment to the transmitter, make sure the aircraft engine
is powered off and motor wires are off connection, in case of an accidental power-on.
Before fly an aircraft for the first time, make sure that the fail-safe function in your
AK28 transmitter is activated.
Before fly an aircraft for the first time, power on the transmitter first and hold the
throttle joystick at its bottom position, then power on the aircraft.
1.3 Precautions on Charging AK28
AK28 transmitter is equipped with a replaceable and chargeable LiPo battery
and a standard 5V/2A output charger adapter in market.
Do not use any USB chargers over 5V output to charge AK28 transmitter.
For the best charging experience, please make sure AK28 transmitter is powered off
before charging. And the charging current should not exceed 2A.
Stop charging if you find the charger is damaged, broken or overheat.
Stop charging if there was a peculiar smell, some smoke or leaks. In such cases you
shall sent the transmitter back to SIYI Tech for detection and testing.
Do not charge AK28 transmitter when the environment temperature or the battery
temperature is over 60℃.

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DANGER
Keep AK28 transmitter away from any places that a baby or a kid may reach while you are
charging it, and it could be better to have supervision from an adult in case of accidents.
You can also have spare batteries forAK28 transmitter andcharge up to threeAK28
batteries through a professional battery charging hub designed and manufactured
by SIYI.
The spare batteries and the battery charging hub are sold separately.
1.4 Precautions on Using SD Card
Do not disassemble, bend, press, abandon or damage SD card by any means.

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Stop using the SD card if you find it soaked by water, oil or any other chemical liquid.
CAUTION
A SD card is also an electronic product, keep it away from static electricity.
Keep the Micro-SD card slot clean in case of blocking by sand or dirt.
Keep the SD card in slot while you are downloading or uploading data; taking out it
mistakenly, hitting it or shattering it may cause damage or data loss.
Keep the SD card away from places that a baby or a kid may reach in case that it was
swallowed mistakenly by the baby/kid.
1.5 How to Use SIM Card on AK28
Coming soon
1.6 Precautions on Storage/Carrying/Recycling
CAUTION
For storage, please keep AK28 transmitter away from any places that babies or kids may
reach.
DANGER
For storage, please keep AK28 transmitter away from such places below:
Places are extremely hot (above 60℃) or cold (under -20℃);
Places under direct sunshine or too dusty or wet;

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Places with an unstable supporting structure or may cause vibration;
Places near steam or other heat sources.

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2 PRODUCT INTRODUCTION
2.1 Product Features
iUAV OS Customized Operating System
Powered by Android, iUAV OS is an improved operating system with deep learning
to drone users' requirement and habits, which provides a stable, convenient and
efficient user experience. AK28 will share its SDK secondary development, and it
has manyhardware extending ports for infinite possibilities to explore more features
in new application scenes
Digital Video Transmission
Integrated with digital video transmission system, AK28 can display real-time video
information in front of your drone in order to ensure your drone flight with more
efficiency and security.
*Compatible with all flight controllers on the market
*The FPV display floating window can be zoomed in or out
*Effective videolink range for agricultural drones: 2 km (height at 3 meters)
Industry-level Protection
Considering the complicated working conditions of agricultural drones outdoors, the
completely waterproof and dustproof process has been done to key connectors on
AK28 operating panel, such as the shell, the switches, external ports, etc. With this

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process, the controller and its system can still work in smooth and stable
performance despite how bad the environment could be.
Dual Navigation Lights
Drone operations at night are safer than ever with VD32’s navigation lights of 8W
consumption and 120-degree searching angle.
High Brightness LCD Screen
Under direct sunlight, you can still have a clear view of real-time information display
due to AK28's 7" high brightness and high definition LCD screen.
Replaceable High Capacity LiPo Battery
AK28 uses the same high capacity lipo battery for top-class smartphone brands.
The battery features low internal resistance, long working time for 10 hours, and an
excellent power curve for the operating system. These are the exactly cool features
which most drone flight requires, especially the long flights.
The Pursuit of Perfect Industrial Design
A Product with Quality and Dignity
AK28 is not only hardware with an open system, but also a carrier of various tastes
and free branding. Metallic operating panel with various choices of color can be
perfectly compatible with your drone design, and laser logo helps you market your

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own brand easily.
2.2 Parts
2.2.1 At a Glance
Mark: Press and hold the power button three seconds to power on AK28 transmitter.

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2.2.2 Button/Switch Types and the Default Channel Definitions
AK28 transmitter has 14 channels in total. Each channel is controlled by an
independent switch or button. Please refer to the form below for the default
channel definitions from channel 1 to 14.
Channel
No.
Joysticks /
Buttons / Switches
Default Definition:
Mode 2
JIYI FC
Default Definition:
Mode 2
BOYING FC
1
Joystick J1
Aileron
Aileron
2
Joystick J2
Elevator (Reversed)
Elevator (Reversed)
3
Joystick J3
Throttle
Throttle
4
Joystick J4
Rudder
Rudder
5
3-stage Switch SA
Flight Mode
High: Attitude
Middle: GPS
Low: Execute AB
(Reversed)
Flight Mode
High: Hold Altitude
Middle: GPS
Low: Auto Flight
(Reversed)
6
3-stage Switch SB
Return to Home, Break
Point
High: Off
Middle: Break Spraying
Low: Return to Home
(Reversed)
Pump
High: Off
Low: On
(Reversed)
7
3-stage Switch SC
Pump
High: Off
Middle: Linkage
Low: Manual
(Reversed)
Return to Home
High: Off
Low: On
(Reversed)
8
3-stage Switch SD
A/B Point
High: Off
Middle: Record A
Low: Record B
(Reversed)
A/B Point, Break Point
High: Record B
Middle: Break / ClearA/B
Low: Record A
(Reversed)
9
3-stage Switch SE
——
——

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10
3-stage Switch SF
——
——
11
Left Dial LD1
——
——
12
Right Dial RD1
CH10: Flow Speed
——
13
Self-reset Button S1
CH11: Radar
——
14
Self-reset Button S2
CH12: Flight Path
High: Off
Low: On
Mark: Self-locking button stays in the position you press them to; Self-resetting button
rebound to original position after a press.
Mark: AK28 transmitter supports customize channel definitions as well. Please refer to
the chapter “SIYI TX APP” in this manual for detail.
2.2.3 Ports on AK28
Port Funciton
DATA: Upgrading transmitter firmware.

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SIM Card: Insert your SIM card to use cellular network.
SD Card: Insert your SD card to read and storage files.
Charging Indicator: Check charging status of your transmitter.
Micro-USB: Charging, file transferring, upgrade Android system.
2.3 Technical Specification
Overall
Channels
14 Channels
Applicable Model
Planes / Helicopters / Gliders / Quadcopters / Multi-rotors /
Vehicles / Boats / Robots
Compatible FC
Open Source Flight Controllers: PIX/APM, etc.
BOYING PALADIN V2
TOPXGUN T1-A
WOOZOOM THEONE-A
EFY FINIX200M
JIYI K3A/K++
CFUAS C1-A
Joystick Resolution
4096 grades
Frequency Band
2400 MHz –2483 MHz
Transmitting Power
100 mW (20 dBm) E.I.R.P
Spreading Method
FHSS
Receiving Sensibility
-101 dBm
Control Range
4 km / 2.5 miles (unobstructed, free of interference)
2 km (ground to ground)
Video Resolution
480p @ 25fps
PC Software
SIYI Assistant v1.2.0
Battery Type & Watt
Hour
Replaceable and Chargeable 3.7V 12690mAh Li-Po 1S
Battery
47 Wh
Duration
10 hours

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Working Current
Transmitter: 200 mA
Receiver: 80 mA
Idle: 60 mA
Charging Port Type
Micro-USB
Wireless Type &
Function
2.4G ISM (radiolink/datalink/videolink)
Bluetooth (datalink communication)
WIFI (internet)
Packing Size
37x27x18 cm
Packing Weight
2.7 kg (3.5kg by volume)
Ground Station (Transmitter)
Operating System
Android 7.0
2G RAM & 16G ROM
Screen Display &
Resolution
7 inch High Brightness LCD Screen
Display Resolution: 1280x800
Battery Type
& Watt Hour
Replaceable & Chargeable 3.7V 12690mAh Li-Po 1S
Battery; 47 Wh
Duration
10 hours
Battery Working
Temperature
0 ~ 55 (℃)
Charging Port Type
Micro-USB; 5V/2A
Charging Time
About 9 hours (through Micro-USB)
5 hours (3 batteries through charging hub)
Dimensions
308 x 148 x 72 mm (antennas folded)
Net Weight
1100 g
Sky Station (Receiver)
Signal Output
14 channels of SBUS, 5 channels of PWM
Datalink Ports (to FC)
UART, CAN (optional)
Antenna Gain
5 dBi
Working Voltage
15 –50V

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Telemetry Voltage
15 –50V
Operating Temperature
-10 to 55 (℃)
Dimensions
59 x 59 x 16 mm (without antenna)
Net Weight
50g (without antenna)
FPV Camera & Navigation Lights
Camera Angle
FOV 120°
Power Consumption
(Navigation Lights)
8 W
Luminous Flux
120-140 lm/W
LED Type
Translucent
LED Searching Angle
120°
Operating Temperature
-10 to 55 (℃)
Dimensions
106 x 25 x 41 mm
Net Weight
108 g
2.4 Packing List
1 x AK28 Transmitter
1 x VD32 Sky Station
1 x FPV Camera with Dual Navigation Lights
1 x 4-pin Data Cable / Flight Controller Cable
1 x OTG Micro-USB Cable

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1 x USB Charger (5V/2A)
1 x Anti-vibration Kit
1 x Upgrading Tool
1 x Strap Belt
1 x Storage Case

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2.5 AK28 Common Diagram