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Flight controller connection diagram

Happymodel Larva X

 

100mm 2

-

3s racer drone DSM2

/

DSMX

 

version

Toggle the AUX1 Switch, the Green LED on 
the Flight controller will getting to be solid

Toggle the AUX1 Switch, the Green LED on 
the Flight controller will getting to be solid

Specifications

Brand Name:Happymodel 
Item Name: Larva X 2-3S 2.5inch Brushless FPV drone 
Wheelbase: 100mm
Size: 88mm*88mm*45mm(without propellers)
Weight: 50g(without battery)
Recommended Battery:
3S 300mah/350mah  2S 450mah

Package includes

Qty

 1

 

 

 

4

 

1

 

1

 

1

 

1

 

Item Name

Larva X frame
Option1: Crazybee F4FR V3.0 PRO FC built-in Frsky NON-EU RX 
Option2: Crazybee F4FS V3.0 PRO FC built-in Flysky RX 
Option3: Crazybee F4 V3.0 PRO FC with

 

external DSM2/DSMX RX 

Option4: Crazybee F4 V3.0 PRO FC

 

with external Frsky RXSR receiver 

Option5: Crazybee F4 V3.0 PRO FC

 

with external TBS Crossfire Nano RX 

1103 KV7000 motor 
2.5inch tri-blades propeller (4cw+4ccw)   
Camera : Runcam Nano2  
VTX: 5.8g 25mw~200mw switchable with 720p DVR (Diamond_vtx) 
Propeller disassemble tool 
Screwdriver 

Binding procedure

Arm/Disarm the Motor

1. The Default Arm/Disarm switch for 

 is AUX1(Channel 5),and you can also customize it with 

Larva X

 

 

Betaflight Configurator. 

3

.

The default channel map for Larva X DSM2

/

X version is TAER1234, please make sure your

 

transmitter is matched, otherwise it will can't be armed. Toggle the AUX1 Switch ,the Green LED 
on the flight controller will getting to be solid, this indicates the motor was armed . And also 
you can found “Armed” displayed on your FPV Goggles or the FPV Monitor. Please make sure 
keep the Larva X level before arming .Be careful and enjoy your flight now !

2.For most of Spektrum radio the default channel 5 is Gear switch and you can also customize 
it. Use

 

DX9 for example, Go to menu and select System setup ,then choose Channel ssign. 

M1

M2

M3

M4

USB

LIPO

+

GND

+5V output

GND

Video_in

Video_out

RX2

RX1

BOOT

BUZ

-

BUZ

+

GND

LIPO

+

TX1

IRX1

LED

TX2

Receiver configuration

Press and hold the bind button of the Speki+ receiver ,then plug the USB. The red led on the 
speki+ receiver would blinking fast , this indicate the receiver is in bind mode .

Make your Spektrum radio transmitter or multi protocol radio transmitter to bind with the 
receiver , if the red LED on the speki+ receiver getting to be solid , this indicate the binding 
successfully. If bind faild you need to  repeat the above steps.

We have configured the receiver for the Larva-X before shipping out . If you flashed the 
betaflight firmware , please setup as the following steps: Enable Serial_RX for UART1 ,then 
select RX_Serial from the Receiver mode and set the serial receiver provider to be SPEKTRUM
2048/SRXL. This receiver mode support both Spektrum dsm2/dsmx radio . And you need to 
enable Telemetry too ,otherwise the receiver will not working .

GND

GND

GND

Video_in

2-3S LIPO
BATTERY INPUT

TX2

LED

IRX1

BOOT

BUZ+

BUZ-

+5V output

+5V output

Video_out

Video_out

TX1

Red LED
LED Blinking Fast---In Binding Mode
LED Blinking slowly---No RC Input Signal
LED solid---Binding successful or RC input signal connected

Red LED
LED Blinking Fast---In Binding Mode
LED Blinking slowly---No RC Input Signal
LED solid---Binding successful or RC input signal connected

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