Happymodel ELRS F4 2G4 AIO 5in1 ExpressLRS FC


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Happymodel ELRS F4 2G4 AIO 5in1

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 the one that all Race/Freestyle pilots needed. It is suitable for use in Tiny whoop Race or Toothpick Freestyle, and can also be used in 1S ultra-lightweight Nano Long Range platform.


  • Flight controller:

- MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
- Sensor: MPU-6000(SPI connection)
- Original whoop size compatible
- Power supply: 1S battery input (DC 2.9V-4.35V)
- Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready
- Built-in Betaflight OSD(SPI Control)
- Built-in 5.8G VTX
- Built-in SPI ExpressLRS 2.4GHz receiver
- Built-in 5V 1A BECFlight controller firmware target: CRAZYBEEF4SX1280

  • Onboard 4in1 ESC:

- MCU upgraded to EFM8BB21
- Power supply: 1S LiPo/LiPo HVCurrent: 5A continuous peak 6A (3 seconds)
- Support BLHeliSuite programmable
- Factory firmware: O_H_5_REV16_8.HEX
- Default protocol: DSHOT600

  • Onboard SPI ExpressLRS 2.4GHz Receiver:

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

  • Onboard 5.8g VTX:

- Output power: 25mw~200mw switchable
- Frequency: 40CH
- Input voltage: 3.3V 5.5V
- Current consumption: 300mA(type)
- Frequency: 5.8GHz 5bands 40 channels(include Race band)
- Smartaudio ready

  • Onboard voltage and Amperage meters settings:

- Voltage meter scale setting: 110
- Amperage meter scale setting: 1175

ExpressLRS for FPV nano long range
ExpressLRS for FPV racing drone with camera
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