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HappyModel CrazyF411 F4 2-4S Whoop/Toothpick AIO Flight Controller w/ 20A 8Bit 4in1 ESC - ELRS 2.4GHz (UART)

Original price $59.99 - Original price $59.99
Original price
$59.99 - $59.99
Current price $59.99
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Equip your 2-4S drone with the HappyModel CrazyF411 F4 Flight Controller. Enjoy flying with its 20A 8Bit 4in1 ESC and ELRS 2.4GHz receiver featuring a high-sensitivity SX1280 frequency chip for low latency, high packet rate, and great range. With a big Mosfet that supports up to 20A currents, this controller is perfect for FPV drones and strong enough for race or freestyle flying. This flight controller lets you update firmware through Betaflight pass-through or WIFI. The 2.4GHz ExpressLRS receiver is equipped with the SX1280 radio frequency chip with high sensitivity, high packet rate, and low latency. The default firmware is ELRS V3.0.1. Get ready to take your drone game to the next level!

Browse the rest of our Whoop AIO Boards and our Happymodel gear.


  • Integrated serial 2.4GHz ExpressLRS receiver
  • Pre-installed with Bluejay firmware)
  • Coming with a BMI270 gyro


    Flight Controller

    • MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
    • Gyro: ICM42688P 
    • Mount pattern: 25.5x25.5 M2
    • Size: 32x28x9mm
    • Power supply: 2-4S Lipo battery
    • Built-in 20A Blheli_S ESC each
    • Built-in Betaflight OSD(SPI Control)
    • Built-in UART ExpressLRS 2.4GHz receiver
    • Built-in 5V 1.5A BEC
    • Flight controller firmware target: CRAZYBEEF4DX
    • Weight: 4.97

    Onboard 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 0.18.1Firmware target: F_H_40_48_v0.18.1
    • Default protocol: DSHOT150/DSHOT300/DSHOT600

    Onboard UART ExpressLRS 2.4GHz Receiver

    • Packet Rate option: 25Hz/50Hz/150Hz/250Hz/500Hz
    • RF Frequency: 2.4GHzAntenna plug: IPEX
    • Telemetry output Power: <12dBm
    • Receiver protocol:  CRSF
    • Default firmware version: ExpressLRS V3.0.1

    Onboard voltage and Amperage Meter Settings

    • Voltage meter scale setting 110
    • Amperage meter scale setting 470



      • 1x HappyModel CrazyF411 F4 2-4S Whoop/Toothpick AIO Flight Controller w/ 20A 8Bit 4in1 ESC - ELRS 2.4GHz (UART)
      • 2x Wire
      • 1x Hardware Set
      • 4x Grommets

      Binding procedure

      1. Supply power to the flight controller by plug USB, wait until the green 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 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”

      Receiver LED status meanings

      Green LED solid means bind successful or RC link established; Green LED double-flash means get into bind mode; Green LED flash slowly means no RC signal input from TX module; Green LED continuous flash fast means ExpressLRS wifi enabled.

      Bind successful


      Bind Mode

      No RC Input

      Wifi Mode