Skip to content

HappyModel CrossF4 F411 1-2S 5A 8Bit AIO Whoop Flight Controller - ELRS 2.4GHz

Original price $44.99 - Original price $44.99
Original price
$44.99 - $44.99
Current price $44.99
Coming Soon
In Stock
Pre Order
Free Delivery on U.S.A. Orders $99 or more

Add To Wishlist

HappyModel continues to impress with yet another fantastic AIO for whoop applications! Check out the HappyModel CrossF4 1-2S AIO Whoop Flight Controller (F4 FC / 5A 4in1 ESC) - Featuring  F411 Flight Controller, with a built in serial UART ELRS for V3.0. 

Browse the rest of our Whoop AIO Boards and all of our Happy Model products!


  • BMI270 IMU (SPI connection)
  • Serial UART ELRS V3.0 receiver
  • Built-in 5V 1A BEC

Specifications: AIO FC

  • Firmware target: CRAZYBEEF4DX4.3.2
  • MCU:STM32F411CEU6 (100MHz, 512K FLASH)
  • Sensor: BMI270(SPI connection)
  • Power supply: 1-2S Lipo Lihv battery input (DC 2.8V~8.7V)
  • Built-in 5A(each) Blheli_S 4in1 ESC Dshot300 ready
  • Built-in Betaflight OSD(SPI Control)
  • Built-in UART ExpressLRS 2.4Ghz receiver(Default firmware ExpressLRS v3.0.1)
  • Built-in 5V 1A BEC
  • Built-in voltage detection and current sensor
  • Built-in Onboard flash 16Mb for Blackbox
Onboard 4in1 ESC
  • MCU: EFM8BB21
  • Power supply: 1-2S LiPo/LiPo HV (2.8v~8.7v)
  • Currents: 5A continuous peak 6A (5 seconds)
  • Support BLHeliSuite programmable
  • Default Factory firmware: S_H_50_REV16_8.HEX
  • Support ESC Protocol: DSHOT150/DSHOT300/DSHOT600

 Onboard UART ExpressLRS 2.4GHz Receiver

  • Packet Rate: 25Hz/50Hz/150Hz/250Hz/500Hz
  • RF Frequency: 2.4GHz
  • Antenna: enameled copper wire 31mm length
  • Telemetry output Power: <12dBm
  • Receiver protocol: CRSF
  • Default firmware version: ExpressLRS V3.0.1
  • The same hardware with Happymodel EP1
  • Could update firmware via ExpressLRS configurator


  • 1x HappyModel CrossF4 F411 1-2S 5A 8Bit AIO Whoop Flight Controller - ELRS 2.4gHz
  • 1x Mounting Hardware
  • 1x Wiring Harness

NOTE: Onboard blackbox enable method:
-Type the following command to CLI:
-set blackbox_device = SPIFLASH
-set flash_spi_bus = 2
-resource FLASH_CS 1 a14

Pay attention: Bind procedure is the same like Happymodel EP1/EP2 receiver, as you need to upgrade your ExpressLRS TX module to V3.X version first.