HappyModel ELRS 2G4 Whoop Flight Controller

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The world’s first AIO 5in1 F4 flight controller with integrated SPI 2.4GHz ExpressLRS receiver has been launched. The flight controller integrates SPI controlled 2.4GHz ExpressLRS receiver, Dshot protocol 4-in-1 ESC, 5.8GHz 40ch video transmitter, and Betaflight OSD. Ultra-small size and ultra-stable remote control range can improve the range of the original SPI receiver. And because the 2.4GHz ExpressLRS receiver is equipped with the SX1280 radio frequency chip with high sensitivity, high packet rate, and low latency, this flight controller is what all Race/Freestyle pilots need. It is suitable for whoop Race or Toothpick Freestyle, and can also be used in the 1S ultra-lightweight Nano Long Range platform.

Check out our other whoop flight controllers, and the rest of our Happymodel offerings.


HappyModel ELRS 2G4 Whoop Flight Controller

  • MCU: STM32F411CEU6
  • Gyro: ICM20689
  • Input Voltage: 1S (2.9-4.35V)
  • Firmware Target: CRAZYBEEF4SX1280

Onboard ESC

  • MCU: EFM8BB21
    Input Voltage: 1S (2.9-4.35V)
  • Current: 5A continuous peak 6A (3 seconds)
  • Factory firmware: O_H_5_REV16_8.HEX
  • Default protocol: DSHOT600

Onboard 2.4GHz ExpressLRS Receiver

  • Packet Rate option: 25Hz/50Hz/150Hz/250Hz/500Hz
    RF Frequency: 2.4GHzAntenna : SMD antenna
    Telemetry output Power: <12dBmReceiver protocol:  SPI ExpressLRSCould bind with Happymodel ES24TX , ES24TX Lite, ES24TX Slim and DIY 2.4GHz ELRS TX module(need to flash the same version ELRS firmware)

Onboard 5.8HGz VTX

  • Output power: 25-200mw switchable
  • Frequency: 5.8GHz 5bands 40 channels(include Race band) Smart audio ready
  • Current consumption: 300mA


  • 1x HappyModel ELRS 2G4 Whoop Flight Controller