Emax Babyhawk O3 User manual

Babyhawk O3
Design in California, Made in China

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Babyhawk O3
Disclaimer:
1. Please read the disclaimer carefully before using this product.
2. By using this product, you indicate your agreement with this disclaimer and confirm
that you have read this product carefully.
3. This product is not suitable for individuals under 18 years old. It is strongly advised
that children under 18 years old use this product under adult supervision.
4. Please read the user manual and warnings carefully.
5. Before each flight, ensure the battery is fully charged and the power connections
are secure. Do not fly around crowds, children, animals, or objects.
6. Our Babyhawk O3 is equipped with open-source flight controllers and electronic
speed controllers to meet the upgrade needs of FPV enthusiasts.
7. EMAX bears no responsibility for any damage or harm, whether direct or indirect,
caused by the use of this product.
Important Notes:
1. Assemble and operate this product correctly according to the instructions.
2. Fly in a safe area away from crowds.
3. Do not use this product in areas with strong electromagnetic interference.
4. Do not use this product in adverse conditions such as strong winds, rain, lightning,
snow, etc.
5. If you have physical or mental illnesses, dizziness, fatigue, or if you are under the
influence of alcohol or drugs, do not use this product.
6. Do not modify or use unauthorized EMAX parts and accessories.
Support:
For updates or technical support, please visit the websites emax-usa.com or
emaxmodel.com.

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Babyhawk O3
Table of Contents
Product Specifications...................................................................................................1
Product List.......................................................................................................................1
1.Babyhawk O3 Structure Diagram...........................................................................2
1.1 Propeller Orientation and Installation...........................................................2
2.Babyhawk O3 Flight Controller..............................................................................4
2.1 EMAX F411 AIO Diagram and Parameters.................................................4
3.EMAX ELRS_2.4G Receiver...................................................................................... 5
3.1 EMAX ELRS_2.4G Receiver Diagram & Parameters ................................5
3.2 EMAX ELRS_2.4G Receiver Pairing ...............................................................5
4. EMAX Babyhawk O3 Flight Controller Setup...................................................6
4.1 Adjusting Software Settings (Betaflight Configurator)............................ 6
4.2 Reprogramming the Babyhawk O3 Flight Controller .............................6
4.3 Restoring Babyhawk O3 Default Settings....................................................6
5.Flying.............................................................................................................................8
5.1 Babyhawk O3 Flight .............................................................................................8
5.2 Arming.......................................................................................................................8
5.3 Line of Sight Flight.................................................................................................8
5.4 FPV Flight..................................................................................................................8

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Product Specifications
Babyhawk O3
Wheelbase (excluding propellers)）
155mm
Maximum Dimensions (excluding
propeller blades):
L*W*H=147*142*33mm
Weight (excluding battery):
195g
Motors:
ECO1404-3700KV
Propellers:
Avan 3.5 inch Propeller
Battery (not included)
Supports 4S battery
Main Board
EMAX F411 AIO
STM32F411 (100MHz) main controller Integrated
4-in-1 8-bit 25A ESC
Receiver
EMAX ELRS_2.4G_RX Receiver
Camera
O3 Air Unit (included in package)
Video Transmitte
O3 Air Unit (included in package)
Product List
Babyhawk O3........................................................................ x1
Propellers.................................................................................x3 CW & x3 CCW
Screwdriver ........................................................................... x1
Instruction Manual Website Card ...................................x1

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1. Diagram of Babyhawk O3 Structure
1.1 Propeller Orientation and Installation
The Babyhawk O3 propellers have two rotation directions: Clockwise (CW) and
Counterclockwise (CCW). When purchasing a set of propellers, please buy 2 CW and 2
CCW propellers.
When installing the propellers, push them onto the motors first, then tighten the
corresponding screws to secure them. Finally, check if the installed propellers match the
orientation shown in the diagram below.

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Note: If the propeller orientation is incorrect, it will directly affect the Babyhawk O3's
ability to fly and be controlled properly. Please carefully inspect and verify the propeller
orientation. Regularly check the tightness of the screws to ensure they remain secure during
flight. Exercise caution and ensure safety when installing or removing propellers!

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2.Babyhawk O3 FC
2.1 EMAX F411 AIO
1.
The diagram of the EMAX F411 AIO is as shown above. This circuit board includes:
Flight Controller Section:
1. Processor: STM32F411CEU6 (100MHz), Firmware: EMAX_BABYHAWK_II_HD
2. Gyroscope: MPU6000 or BMI270 or ICM-42688-P (SPI Connection)
3. Supports Video Character Overlay (AT7456E)
4. Hardware UART Ports (UART1, UART2)
5. Micro USB or Type-C Interface
6. Supports Programmable RGB LED Strip, 5V Active Buzzer Support; Onboard Current
Sensor, Black Box: 2M
7. Input Voltage: 4S, Output Voltage: 5V/2A, 3.3V/1A
8. Weight: 8.0g, Mounting Holes: 25.5mm*25.5mm
Electronic Speed Controller (ESC) Section:
1. MCU: EFM8BB2F16G
2. Firmware: BLS M_H_30-Rev16.7
3. Stable continuous output current of 25A, with a peak value of up to 30A
4. Input Voltage: 4S
3. EMAX ELRS_2.4G Receiver

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3.1 EMAX ELRS_2.4G Receiver Diagram
The diagram of EMAX ELRS_2.4G_RX is as shown above. Receiver parameters:
Size: 11mm16mm3mm
Weight: 0.7 grams
Operating Voltage: 5V Operating Protocol: CRSF (Betaflight)
Minimum Receiver Refresh Rate: 25Hz
Maximum Receiver Refresh Rate: 500Hz
Antenna: Integrated chip antenna
RF Chip: SX1280IMLTRT
Main Control Chip: ESP8285
RF Frequency Band: 2.4GHz
ISM Type, RF Frequency Range: 2400MHz to 2500MHz
3.2 EMAX ELRS_2.4G Receiver Binding
The EMAX ELRS_2.4G receiver can be put into binding mode by power-cycling it three
times. As EMAX has already connected the receiver with the flight controller, you can
directly plug and unplug the battery three times in quick succession to enter binding mode.
The red LED on the receiver will rapidly blink twice, indicating that the receiver is in binding
mode. Then, make sure your RF TX module is also in binding mode and emitting binding
pulses. If the red LED on the receiver remains solidly lit, it means the binding has been
successful.
Note: EMAX ELRS_2.4G Receiver LED status indicators:
Double blinking: Binding mode
Slow blinking: No transmission signal received
Steady light: Transmission signal received
Fast blinking: WiFi upgrade mode
4. EMAX Babyhawk O3 Flight Controller Setup

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The Babyhawk O3 flight controller comes pre-programmed and has been
appropriately adjusted for optimal flight performance. For comprehensive adjustment and
configuration settings (CLI dump file), please visit https://emax-usa.com/ to obtain the CLI
dump file.
4.1 Adjusting Software Settings (Betaflight Configurator)
Betaflight Configurator can be used to modify programming settings on the Babyhawk
O3 and to flash new firmware as needed.
The Betaflight Configurator and flight controller firmware can be downloaded from
https://github.com/betaflight/.
The Babyhawk O3 flight controller firmware is EMAX_BABYHAWK_II_HD.
EMAX has optimized parameters for the Babyhawk O3 to achieve excellent flight
performance. Changing them could affect flight time, speed, control, motor heat, etc. EMAX
strongly recommends not altering PID and firmware settings arbitrarily.
4.2 Reprogramming the Babyhawk O3 Flight Controller
1. Hold down the Boot button, then connect the flight controller to your
computer using a Micro USB or Type-C data cable to put it in DFU mode.
2. Choose EMAX_BABYHAWK_II_HD as the target and select the firmware. Choose
the manual baud rate of 256000 from the dropdown menu.
3. Choose "Load Firmware (Online)" to download the firmware.
4. Choose "Flash Firmware" to program the flight controller.
4.3 Restore Babyhawk O3 Default Settings
from https://emax-usa.com/ Download the latest CLI Dump file, open it in a text editor,
copy all the text, paste the settings into the command bar, and press Enter. Once completed,
Babyhawk O3 will reconnect to Betaflight.

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