UDI R/C U818A WIFI User manual

2
Name of Parts
1. Drone
White Blade B
Black Blade A
Picture 1
Black Blade B
White Blade A
LED Light
Picture 2
2. Transmitter
Power Indicator
Light
Mobile Phone
Screen Lens hood
Throttle/
Rudder Stick
Forward/
Backward/
Left/Right
Flying Stick
Forward/
Backward Trim
Left/Right
Flying Trim
Flip
Power Switch
Left/Right
Rudder Trim
Headless Mode
High/Low
Speed Mode
LCD
Flip IconHeadless Mode Icon
High/Low Speed Icon
Power On
Direction
U818A WIFI
ITEM NO.: U818A WiFi
[email protected]
There are A/B letters marked on the blades,
and they have to be installed at the same positions as the picture 1 shows.

3 4
2. Safety Precautions:
Keep away from crowd when flying because a flying RC drone is very dangerous.
Improper assembly, broken main frame, defective electronic equipment or unskilled
operation all may cause unpredictable accidents such as drone damage or human
injury. Please pay special attention to safety operation and have good knowledge of
accident responsibility that the user may cause.
1. Important Statement:
(1) This product is not a toy but a piece of complicated equipment which is
integrated with professional knowledge by mechanic, electronic, air mechanics,
high-frequency emission etc., so it should be installed and adjusted correctly to
avoid accidents. The user must always operate in a safe manner. We undertake
no liability for human injury or property damage caused by improper operation
as we could not control the procedure of installation, use and operation of this drone.
(2) This drone is suitable for those experienced RC drone user aged 14 years or more.
(3) The flying field must be legally approved by local government.
(4) We undertake no liability for those accidents caused by improper operation,
use and control of the drone after sale of the product.
(5) We have entrusted the distributor to provide technology support and after-sale
service. If you have any questions about use, operation, repair etc., please
contact local distributor.
Notice:
(1) Keep away from obstacles and crowd
The speed and status of a flying RC drone is uncertain and it may cause potential
danger. So the user must keep away from crowd, tall building, power lines etc.
when operating a flying RC drone. Forbid flying a RC drone in rainy, storm,
thunder and lighting weather for the safety of user, around people and their property.
(2) Keep away from humid environment
The drone inside is consisted of precise electronic components. Humidity or
water vapor may damage electronic components and cause accident.
(3) Safe operation
Please operate the RC drone in accordance with your physical status and flying skill.
Fatigue, listlessness and improper operation may increase the rate of accident.
(4) Keep away from rotating parts
Keep your face and body as well as all spectators away from rotating parts,
which may cause serious injury and damage.
(5) Keep away from heat
The RC drone is made of metal, fiber, plastic, electronic components etc. Keep
away from heat and sunshine to avoid distortion and damage.
(1) Flying field must spacious enough and we suggest at least
8M (length)*8M (width)*5M (height).
(2) Make sure the battery of the drone and its transmitter are fully charged.
(3) Make sure the Throttle Control Stick of the transmitter in the lowest position.
3. Check List Before Flight
Picture3
Battery Cover
4X1.5V
Alkaline Batteries
Drive the screw according to
the arrow direction to loosen
the screw and open the
battery cover. Tighten the
screw by driving it to opposite
direction.
(4) Please strictly obey the order of turn on and turn off before operation. Turn on
the transmitter power first and then turn on the drone power before flying; turn
off the drone power first and then turn off the transmitter power when finish flying.
Improper turn on and turn off order may cause the drone out of control and
threaten people’s safety. Please cultivate a correct habit of turn on and turn off.
(5) Make sure the connection is solid between battery and motor etc. The ongoing
vibration may cause bad connection of power terminal make the drone out of control.
(6) Improper operation may cause drone crash, which may arouse motor defective
and noise, and then effect the flying status or even stop flying. Please go to the
local distributor to buy new parts for replacement so that the drone will return to
its best status.
Transmitter Installation:
Battery installation: open the battery cover on the back side of transmitter and put 4
alkaline batteries (excluding) into the box in accordance with
electrode instructions.
1. Make sure the electrodes are correct.
2. Do not mixed use new and old batteries.
3. Do not mixed use different kinds of batteries.
Notice:
How to install the mobile phone
1. Press the self locking switch on the side, push the mobile phone holder to
utmost as Picture 4.
2. Put the mobile phone on proper place and pull back the mobile phone holder and
press tightly as possible as you can to avoid the fall of mobile phone (please
note that do not touch the mobile phone button) as Picture 5.
Picture 4 Picture 5

5
Additional Instruction before Flying:
1. The white light is front (head).
2. Power on the drone and check the rotating blades. The left front/right rear
blades rotate towards clockwise direction while the right front/left rear blades
rotate towards counterclockwise direction.
Charging Method of Li-Po Battery
1. Connect the USB wire with one of the USB port listed in the below picture first,
and then connect the drone battery with the USB wire. (prior to choose 2A, 5V
charger)
2. After connecting the USB wire with the USB port, the green USB indicator light
keeps bright. After connecting the USB wire with the drone battery, the red USB
indicator light keeps bright. About 50 minutes later, the light turns to green and
keeps bright when fully charged.
* Li-Po battery is included in spare parts and please pay attention on the safe notice.
* Never put the battery on high temperature place, such as fire or heating device to
avoid damage or explode.
* Never use the battery to crash or hit hard surface.
* Never put the battery in water. Keep it in dry place.
* Never detach the battery.
* Never leave the battery without supervision when charging.
Drone Battery
3. Insert the lens hood to the slot and make sure the lowe edge of the lens hood
next to the mobile phone closely as Picture 6.
Picture 6
Li-Po Battery Disposal & Recycling
Wasted Li-Po batteries must not be placed with household trash.
Please contact local environmental or waste agency or the
supplier of your model or your nearest Li-Po battery recycling center.

6 7
3. Put the drone on the flat ground. The indicator light keeps bright, which indicates
successful frequency pairing and the drone is ready to be controlled.
Important Notice: Please make sure the gyro of the receiving board is placed on the
horizontal position after powering the drone, so that the drone can
be controlled.
3. Adjust relative transmitter Trim button to adjust the rudder if the drone tilts to
one side when flying.
Picture 13
Picture for battery installation and power on the drone.
Battery
Flying Control
1. Push the Forward/Backward/Left/Right
Flying Stick to left or right and the drone
flies to left or right synchronously.
2. Push the Throttle Stick to up or down
and the drone flies to up or down
synchronously.
3. Push the Throttle Stick to left or right
and the drone rotates to left or right
synchronously.
4. Push the Forward/Backward/Left/Right
Stick to up or down and the drone flies
to forward or backward synchronously.
4. The transmitter issues sound of dididi... when the drone battery is low. Please
land the drone as soon as possible after low battery alarm.
Picture 7 Picture 8
Calibration Instruction
Please follow the below orders to calibrate the drone if the drone hovers after
taking off, and can not be adjusted by trim button and cause difficult operation.
1. Turn off the drone switch and then turn off the transmitter switch.
2. Turn on the transmitter switch, push the Throttle Stick to utmost control distance
and then pull to the lowest position (See Picture 7 and 8), and the transmitter
enters the state of code pairing waiting.
Picture 10 Picture 11 Picture 12
Flying Operation:
1. Turn on the transmitter switch (Picture 10) and its indicator light flashes quickly.
Push the Throttle Stick to utmost control distance and then to the low end
(Picture 11/12). The indicator becomes flash slowly, which indicates the
transmitter enters frequency pairing.
2. Put the battery into the drone battery box, and then connect the battery with the
drone. The front light flashes slowly. (Picture 13)
Picture 9
3. Power on the drone and put it on the horizontal position. The drone tail
face to the user and the drone head faces forward. You will hear “ di, do,
di” three seconds later, which indicates successful code pairing. The
fuselage light keeps bright.
4. Forbid to move Throttle Stick before successful calibration. Push the
Forward/Backward/Left/Right Stick as below picture (See Picture 9). The
drone fuselage light flashes, which indicates that the drone is calibrating.
Then the fuselage light of the drone keeps bright, which indicates the
drone is ready to fly.

8 9
8. High/Low Speed Mode
9. Flip Mode
6. Adjust Forward/Backward Trim
Adjust the Trim to backward if the
fuselage drifts to forward when
taking off, and vice versa.
Drift to Forward Drift to Backward
7. Adjust Left/Right Flying Trim
Adjust the Trim to right if the fuselage
drifts to left when taking off, and vice
versa.
Drift to Left Drift to Right
1. MODE 1
Low speed mode, is suitable for beginner to practice
in windless condition.
2. MODE 2
High speed mode, is suitable for senior player to
experience aerobatics outdoors.
Press flip mode button of the transmitter when flying and
the transmitter will issue sound of “ didi...”, which
indicates the drone enters flip mode. Push the Forward/
Backward/Left/Right Flying Stick to forward/backward/
left/right The drone will do 360° flipping to
corresponding direction synchronously.
10. Headless Mode
1. The drone head must face forward before entering headless mode.Notice:
2. The flying rudder may drift for drone crash under headless mode.
At this time you can exit from headless mode and re-enter headless
mode again, and the rudder will return to normal state.
Right
1. When the drone is flying or stay on the
groud, the drone head faces to front.
Press Headless Mode button and
the drone body light flashes quickly,
which indicates the drone enters
headless mode.
2. Press the Headless Mode button again
and the drone body light keeps bright,
which indicates the drone exits headless
mode. The drone must in front of the
user when enter headless mode.
3. The headless mode is designed for
beginner. It also suitable for those
situation that the drone in sunshine or
the drone over a long distance and can
not recognize the drone front and rear.
White Light Front (Head)
Left
Rear
5. Adjust Left/Right Rudder Trim
Adjust the Trim to right if the drone
head rotates to left when taking off,
and vice versa.
Rotate to Left Rotate to Right

10
Download and install the App: udirc-FPV
The App is suitable for mobile phone with iOS or Android system, please download
from the mobile phone software store:
1. For mobile phone with iOS system, please search udirc-FPV in APP Store.
2. For mobile phone with Android system, please search udirc-FPV in Google Play.
3. Scan the QR code below or the QR code in the color box to download the App:
uidrc-FPV, like Picture 14, Picture 15 and Picture 16 as below:
Operation Instruction for Mobile Phone WiFi
1. Refer to the “Flying Operation” as before.
2. Enter “set up” of the moblie phone, turn on WiFi (WLAN) and choose
udirc-FPV-..., return to desktop after successful connection.
3. Click the icon of udirc-FPV as Picture 17 and enter the App interface as Picture 18.
udirc-FPV
ANDROID APP ON
App Store
Available on the
udirc-FPV
Picture 14
Picture 17
Picture 18
Click
Picture 15 Picture 16
Frequency Pairing between Mobile Phone and Drone WiFi

11
Introduction for Mobile Phone Control
4. Click icon and enter remote control interface as Picture 19.
Tip: Following “ Flying Operation” before entering mobile phone control function.
1. Back to main menu
2. View photo and video
1
Touch icon to
return,
Exit from work interface.
Touch icon to view
photo and video
2
Click
Picture 19

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3. To view the screen without controls
4. High/Low speed mode
5. Taking photo
3
Touch icon and
to view the screen
without controls.
4
Touch icon (Low
Speed), turn to icon
(High Speed).
5
Touch icon once to
take photo.
6. Recording Video
7. Up and down throttle control
8. Turn left/right rotation control
6Touch icon to
record video, and then
touch icon again
to finish video recording.
Press the ball and push it
up and the drone will fly up;
pull down the ball and the
drone will fly down.
10
11 12
Press the ball and move it
to left and the drone will
rotate to left; move the ball
to right and the drone will
rotate to right.
RightLeft

14 15
12. Headless mode
8
When the mobile phone
shakes to left/right, the
ball will move to left/right,
and the drone will fly to
left/right.
When the mobile phone
shakes to forward/
backward, the ball will roll
forward/backward, and
the drone will fly to
forward/backward.
Touch icon to
enter headless mode.
Touch icon again
and exit from headless
mode.
9. Right/left flying control
10. Forward/backward control
11. Gravity induction mode
7
15
16
Press the ball and move it
to left and the drone will fly
to left; move the ball to
right and the drone will fly
to right.
13 14
Touch icon to
enter gravity induction
mode, which only
available for flying to
left/right and
forward/backward.
Press the ball and move it
up and the drone will fly to
forward; move the ball
down and the drone will fly
to backward.

16
14. Forward/backward flying trim
15. Left/right rotation trim
Adjust the trim to down if
the drone tilts to forward;
and adjust the trim to up
till balance if the drone
tilts to backward.
17
18
Ajust the trim to right if the
drone rotates to left; and
adjust the trim to right till
balance if the drone
rotates to right.
19 20
RightLeft
13. VR (virtual reality) Mode
9
* This function is only available when using a VR Headset (excluded).
Touch the icon to enter
the mobile phone split screen
mode. Touch the icon
again to exit from VR mode.

17 18
Notice:
1. If you can not search the WiFi signal to connect, turn off WiFi and turn on again
to search and connect.
2. The available WiFi control radius is 40m, please control the drone within this range.
3. Please pull the throttle stick to lowest position when you want to change the
controll method from transmitter to mobile phone or from mobile phone to
transmitter, or the drone can not be controlled alternately.
Picture 22
Picture 23
Help
In the interface, click the icon (as Picture 22) and enter help interface (as Picture 23,
24, 25).
Click
Picture 24 Picture 25
The drone works well only when the motor wires connected with the receiving
board as below.
LED Socket
RightLeft
Front
Rear
Additional Instruction of Receiving Board
Tip: Please play the video or photo after copying all aerial photography data to
computer and make sure the play software can support its format.
Basic parameter for aerial camera: Video DPI 1280*720P/30FPS;
Image Size 1280*720P.
Operation for Video Recording and Photo Taking
1. Press TF card and insert to the aerial camera as Picture 27. Please note that
the metal side of the card must up.
2. When taking photo, the moblie phone and TF card will store the picture. When
recording video, the video will only be stored in TF card. Meanwhile, you can
preview or download the video in moblie phone only when the TF card in the
camera box and the drone is connect with the transmitter.
Notice: Press Video Button to save a video when finish recording, or the video
cannot be saved.
3. Power off the drone first when finish aerial photography. Take out TF card and
insert the card to a card reader. Connect the card reader with computer. After
a while, view the aerial photography data from “my computer” -”mobile disk”.
Picture 26
Picture 27
Connect No. 1 socket of receiving board with
right-front motor wire.
Connect No. 2 socket of receiving board with
left-front motor wire.
Connect No. 3 socket of receiving board with
left-rear motor wire
Connect No. 4 socket of receiving board with
right-rear motor wire.
16. Left/right flying trim
Adjust the trim to right if
the drone flies to left; and
adjust the trim to left till
balance if the drone flies
to left.
21 22
Setting
In the interface, click the gear icon (Picture 20)
and you’ll see Picture 21.
Picture 20
Click
Picture 21
Trim Settings:
Turn on to store the trim setting data;
Turn off and the trim setting data will not be stored.
Video Quality:
Turn on for 480P or 720P mobile phone preview.
1. Return
2. Photo&video playback
3. Show / Hide control interface
4. Speed:Slow/ High
5. Take photo
6. Record video
7. Gravity sensor mode
8. Headless control
9. Switch for VR split mode,a VR
BOX is necessary for watching
Instruction
1 2
10
9
11 12
13
15
16
14
17
18
19 20 21 22
345678 1 2
10
9
11 12
13
15
16
14
17
18
19 20 21 22
345678
10. Throttle control
11/12. Left/right rotation trim
13/14/15/16. Directional control
Left/right/forward/
backward
17/18. Pitch Forward/backward
ne-tune
19/20. Left/right rotation ne-tune
21/22. Left/right roll ne-tune
Instruction
1. Turn on the product ( Four
axis aircraft ).
2. Enter the “Settings”menu
of your mobiledevice.
3. Then turn on “WiFi” and
Connect to the AP of this
Product.
4. Enter the control interface of
this APP,you would see the
real-time video from the
aircraft camera,and you
now can start your ight.
HELP
FLIGHTATTITUDE
Prarameters auto save
Reset the parameters
INTERFACE SETTINGS
Preview720P
Preview480P

19 20
Spare Parts
For convenience, the spare parts are listed for you to choose, which can be
purchased from the local distributor.
Troubleshooting Guide
The
transmitter
indicator
light is off
Fail to
pair the
drone with
transmitter
The drone
is under-
powered
or can not
fly.
The drone
can not
hover and
tilts to one
side
The drone
indicator
light is off
Can not
see the
picture
Hard to
control by
cellphone
1
2
3
4
5
6
7
Problem Problem Cause SolutionNo.
1. The transmitter battery is too low. 1. Replace battery.
2. The battery positive pole and negative
pole are in reverse order.
2. Install the battery in accordance with the
user manual.
3. Poor Contact. 3. Clean the dirt between the battery and the
battery alice.
1. Indicator light is off. 1. The same as above 1.2.3.
2. There is interfering signal nearby. 2. Restart the drone and power on the
transmitter.
3. Misoperation. 3. Operate the drone step by step in
accordance with the user manual.
4. The electronic component is damaged
for frequent crash.
4. To buy spare parts from local seller and
replace damaged parts.
1. The blade deformed seriously. 1. Replace blade.
2. The drone battery is too low. 2. Recharge the drone battery.
3. Incorrect installation of blade. 3. Install the blade in accordance with the
user manual instruction.
1. The blade deformed seriously. 1. Replace blade.
2. The motor holder deformed and out of
verticality. 2. Replace the motor holder.
3. The gyro did not resetting after violent
crash.
3. Put the drone on the flat ground for
about 10s or restart the the drone to
calibrate again.
4. The motor is damaged. 4. Replace motor.
1. The drone battery is too low. 1. Recharge the drone battery.
2. The battery is expired or overdischarge
protection.
2. Buy a new battery from local seller to
replace or recharge the battery.
3. Poor contact. 3. Disconnect the battery and then connect
it with the plug again.
1. Did not connect the wire of camera box
or poor contact. 1. Check the wire and connect well.
2. There is interfering signal nearby. 2. Cut off the wire and re-connect.
3. Damaged camera. 3. Buy a new camera box from local seller
to replace.
1. Not experienced enough. 1. Practice and read the cellphone
controlling instruction carefully.
U818A WIFI-01
Main Frame
U818A WIFI-02
Blade
U818A WIFI-03
Drone Cover
U818A WIFI-04
Base Leg
U818A WIFI-05
Carbon Tube
and Tooth Gear
U818A WIFI-06
Standard Motor
(Red and Blue Wire)
U818A WIFI-07
Reverse Motor
(Black and
White Wire)
U818A WIFI-08
Standard Motor
Parts (Blue Light)
U818A WIFI-09
Standard Motor
Parts (Red Light)
U818A WIFI-10
Reverse Motor
Parts (Blue Light)
U818A WIFI-11
Reverse Motor
Parts (Red Light)
U818A WIFI-12
Receiving Board
U818A WIFI-13
Camera Box
U818A WIFI-14
TF Card
U818A WIFI-15
Battery
U818A WIFI-16
USB Wire
U818A WIFI-17
Card Reader
U818A WIFI-18
Transmitter

FCC Information
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 residential 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:
The equipment may generate or use radio frequency energy. Changes or
modifications to this equipment may cause harmful interference unless the
modifications are expressly approved in the instruction manual. Modifications not
authorized by the manufacturer may void user’s authority to operate this device.
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.
FCC WARNING:
● Reorient or relocate the receiving antenna.
● Increase the separation between the equipment and receiver.
● Connect the equipment into an outlet on the circuit different from that to which
the receiveris connected.
● Consult the dealer or an experienced radio/TV technician for help.