The CruxF405HD ELRS All-in-One flight controller is a game-changer! It comes with an integrated UART 2.4GHz ExpressLRS receiver and a 20A Blheli_s ESC (Bluejay firmware pre-installed), supporting 2-4s batteries. With bigger Mosfets for up to 20A currents, it's perfect for 2-4S toothpick drones or long-range FPV drones. There's a reserved 6 pin socket for DJI HD equipment, making it a breeze to build an HD digital FPV drone.
Check out our other AIO flight controllers, and the rest of our Happymodel offerings.
NOTES: If upgrade firmware to betaflight 4.4.x, need to add custom Defines “GYRO_SPI_ICM42688P ACC_SPI_ICM42688P” from build configuration of Betaflight configurator otherwise gyro may not be recognized.
Features
- Integrated UART 2.4GHz ExpressLRS receiver
- 20A Blheli_s ESC(Bluejay firmware pre-installed)
- Big Mosfets for 20A currents
- Great for 2-4S toothpick drones
- Reserved 6 pin socket for DJI HD equipment, plug & play.
Specifications
Flight controller
- MCU: STM32F405RGT6 (168MHZ, 1Mbyte FLASH)
- GYRO Sensor: ICM42688 (SPI connection)
- Mount hole size: 20mm*20mm
- Power supply: 2~4S battery input (DC 8.7V-17.4V)
- Built-in 20A(each) Blheli_S 4in1 ESC
- Built-in Serial ExpressLRS 2.4G (Default connected to UART2)
- Built-in BMP280 Barometer
- Built-in 8MBp blackbox
- Built-in voltage meter sensor, voltage meter scale 110
- Built-in current meter sensor, current meter scale 470
- Flight controller firmware target: BETAFLIGHTF4
4in1 ESC (MCU upgraded to EFM8BB21)
- Power supply: 2-4S LiPo/LiPo HV (7v/17v)
- Currents: 20A continuous peak 25A (5 seconds)
- Support BLHeliSuite programmable
- Factory firmware: Bluejay 0.19.2
- Firmware target: F_H_40_48_v0.19.2
- Default protocol: DSHOT150/DSHOT300/DSHOT600
UART ExpressLRS 2.4GHz
- Receiver Packet Rate option: 25Hz/50Hz/150Hz/250Hz/500Hz
- RF Frequency: 2.4GHz
- Antenna plug: IPEX
- Telemetry output Power: <12dBm
- Receiver protocol: CRSF
- Default firmware version: ExpressLRS V3.0.1
Voltage and Amperage meters settings
- Voltage meter scale setting 110
- Amperage meter scale setting 470
Includes
- 1x HappyModel CruxF405HD 2-4S F4 AIO 20x20 Flight Controller (w/ 20A 8Bit 4in1 ESC & 2.4GHz ELRS RX)
- 1x XT30 Pigtail
- 1x ELRS T Antenna
- 4x Rubber Grommets
- 4x Motor Plugs
Binding
Binding procedure:
- Supply power to the flight controller by plug USB, wait until the red LED on the FC is off, immediately turn off the power, and then repeat again the above steps. When the FC is powered on for the third time, the red LED light will start to double-flash, which means that the Receiver enters the binding mode
- 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 red LED should blinking slowly first then turn to solid, that means binding was successfully. If the red led keep tri-flash after binding, please change Model Match tab value from “off” to “on” or from “on” to “off”
Receiver LED status meanings:
Red LED solid means bind successful or RC link established; Red LED double-flash means get into bind mode; Red LED flash slowly means no RC signal input from TX module; Red LED continuous flash fast means ExpressLRS wifi enabled; Red LED tri-flash means model mismatch need to change model match from “off” to “on”.
UART description:
ELRS receiver was connected to UART2 default out of factory.
Usually UART1 or UART6 Could be used for MSP OSD with HD VTX.
UART6 could be used for GPS or other serial equipment.
IRX6 is an inverted serial RX6 for SBUS input.
IRX6 and TX6/RX6 couldn't be used at the same time.
This HappyModel CruxF405HD 2-4S F4 All-in-One Flight Controller is a must-have for drone enthusiasts! Ideal for building 2-4S toothpick drones or long-range FPV drones, it offers powerful features. The flight controller has a 20mm*20mm mount hole size. It comes with an integrated UART 2.4GHz ExpressLRS receiver and a 20A Blheli_s ESC with pre-installed Bluejay firmware, supporting 2-4S batteries. With bigger Mosfets for up to 20A currents, it's a great choice for those looking to enhance their drone's performance. It also has a reserved 6 pin socket for DJI HD equipment, making it easy to set up. Included are an XT30 Pigtail, ELRS T Antenna, 4 Rubber Grommets, and 4 Motor Plugs.
