Happymodel Crux35 User manual

Default Propeller installation of Crux35 was set to be Prop Out”, please install
CCW propeller to Motor1 and Motor4 and install CW propeller to Motor2 and
Motor3, make sure you have mounted the screws tightly for the propellers.
3) Check the receiver channel map and channel value is correct after bind successful.
1)Turn on your radio transmitter and connect the battery to the Crux35. Then
place Crux35 horizontally on the ground. We recommend 4S 750mah or
4S 850mah Li-po battery for Crux35 and Crux35 HD
2)Prepare your goggles, and match the channel with the VTX_table
3)Toggle Aux1 switch to arm the motors, the Green LED at the bottom of the
flight controller would get be solid once armed, happy flying.
Ultra-lightweight 3.5-inch BNF FPV Freestyle Drone
HD video transmission and analog video transmission are optional
Integrated ExpressLRS UART receiver or Frsky SPI D8/D16 receiver
High efficiency EX1404 power system
Can be equipped with Naked Gopro or SMO4K
Support 3-4S battery 4S 750mah battery is recommended, maximum
support 4S 1100mah
Brand: Happymodel
Product name: Crux35 / Crux35 HDZERO / Crux35 HD
Wheelbase: 150mm
Weight: Crux35 87gram Crux35 HD 108gram
Size: 130mmx130mmx45mm(without propellers)
Receiver option: UART ExpressLRS 2.4GHz
SPI Frsky D8/D16 (S-FHSS compatible)
Camera and VTX option:
HD DJI version Nebula+Vista or Runcam Link Wasp Nano
HDZERO version RunCam Nano HDZero Camera + HDZERO WHOOP VTX
Analog version Ant+OVX303 or OVX306 VTX
Flying time: 9min~15min 4s 750mah battery
Bind procedure video for your refrence http://bit.ly/40Kr4H8
1) Supply power to the flight controller by plug USB, wait until the green LED on
the FC is off, immediately turn offthe power, and then repeat again the above
steps. When the FC is powered on for the third time, the green LED light will
start to double-flash, which means that the RX enters the binding mode
)2 Please make sure your ExpressLRS tx module firmware is v3.x.x. And go to
ExpressLRS.lua from TOOLS”menu of your radio transmitter. Then hit [Bind]
to binding with the onboard ExpressLRS receiver. The green LED should blinking
slowly first then turn to solid, that means binding was successfully. If the green
LED still keep double flash after binding ,please change Model Match tab value
from off” to on”or from on”to off”
Make sure the VTX band is "OFF" from the vtx administrator, sometimes it would
affect VTX or RX quality .
Noticed: Onboard ELRS RX was connected to TX2 and RX2 default. Short
connect with +5V and E5, then TX2 and RX2 could used for other equipment.
ET
ER
E5
GND
VOUT
VIN
+5V
GND
TX1 RX1
+5V
GND
LED S_BUZ-
+5V
GND
TX2
RX2
Crux35 Crux35 HDZERO
Crux35 Frame
Option1: ELRS X1 FC with
SPI ELRS（Discontinued）
Option2:CrazyF411 ELRS FC
with UART ELRS
Option3: CrazyF411 FRSKY FC SPI Frsky
CaddxFPV Nebula Nano Kit
Or Runcam Link Wasp Nano
HDZERO Whoop VTX+ Rucam
HDZERO Camera
Analog FPV Camera Caddx Ant
OVX303/OVX306 5.8G analog VTX
Happymodel EX1404 Kv3500
HQProp T3.5X2X3Grey (4cw+4ccw)
Screw Driver
Buckle Velcro for battery
Crux35 HD DJI
1
1
0
0
1
1
4
1
1
1
1
1
1
0
0
0
4
1
1
1
1
1
0
1
0
0
4
1
1
1
S M32F411 BOOTT
(Flight controller BOOT)
BAT+
GND
ESP8285 BOOT
(Onboard ELRS RX boot)
IPEX connector
Receiver
Status
LED

. , :1 If we need to use Channel 5705 then we should Go to Betaflight CLI type the command
_ =Set VTX band 3
_ =Set VTX channel 1
save
.2 Disarm the Crux35 and then move the stick of the transmitter
( + + ) , ,THR MID YAW LEFT PITCH UP to enter OSD Menu Enter to Features then enter to VTX
SA to set VTX Band and channel
CH
FR
BOSCAM_A
BOSCAM_B
BOSCAM_E
FATSHARK
RACEBAND
LOWRACE
C 1H
5865M
5733M
5705M
5740M
5658M
5333M
C 2H
5845M
5752M
5685M
5 M760
5695M
5373M
C 3H
5825M
5771M
5665M
5780M
5732M
5413M
C 4H
5805M
5790M
56 5M4
5800M
5769M
5453M
C 5H
5785M
5809M
5885M
5820M
5806M
5493M
C 6H
5765M
5828M
5905M
5840M
5843M
5533M
C 7H
5745M
5847M
59 5M2
5860M
5880M
5573M
C 8H
5725M
5866M
59 5M4
5880M
5917M
5613M
TX1
VOUT VIN
+5V
GND
BAT+
GND
BAT+
GND
RX1
TX1
BAT+
GND
RX1
TX1
Analog version
HD DJI and HDZERO version
+5V
GND
BAT+
+5V
GND
GND
VOUT
VIN