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Happymodel CrazyF4 ELRS AIO 5in1 Flight Controller Built-in 868 mhz 900MHz ELRS RX ExpressLRS BLHELIS 5A 200mW for FPV BWhoop


Regular price $67.28

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The World first AIO 5in1 whoop flight controller built-in Expresslrs receiver is coming out now. This F4 flight controller built-in 5A esc, VTX, OSD, high performance 900MHz expresslrs receiver, it’s best for 1S Long Range and Tinywhoop.

The world's first AIO integrated F4 flight controller with integrated 900MHz ExpressLRS receiver has been launched. The flight controller integrates Dshot esc, 5.8GHz 40ch analog image transmission, ELRS 900MHz receiver and Betaflight OSD. Ultra-small size, ultra-long remote control distance Improve the problem of the short distance of the original integrated flight control SPI receiver. At the same time, the flight controller is also very suitable for 1S long-distance aircraft. For example, when used on long-distance aircraft, you can disconnect the Smartaudio onboard image transmission and connect GPS to UART2.

Linking steps:

1. Power the flight controller through USB connection. After inserting the USB for the first time, disconnect the USB as soon as the receiver LED on the flight controller goes out. Repeat the operation once, the receiver LED will start to flash double after the USB is plugged in for the third time, which means that the onboard ELRS receiver enters the linking mode.

2. After the ES915TX module or DIY 2.4G ELRS tuner module and the OpenTX remote control are correctly connected, copy the ELRS.LUA file to the SD card in the remote control, the directory is SD Card/Scripts/tools, and then run ELRS.LUA Perform Bind operation.

3. After the binding is successful, the LED on the receiver will become steady on, and the telemetry signal can be received at the same time.

4. The meaning of the receiver LED status: the LED is always on, indicating that the linking is successful or the connection and communication is normal, the LED double flashing indicates that the receiver is in the linking state, and the LED flashing slowly indicates that the transmitter signal cannot be received.



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 Serial-based ExpressLRS 900MHz receiver(915MHz or 868MHz optional)
Built-in 5V 1A BEC

Flight controller firmware target: CRAZYBEEF4DX

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 Serial-based ELRS Receiver

Operation current: ~100Ma
Rx To FC protocol: CSRF
RF Frequency optional: 915mhz or 868mhz(EU)
Antenna connector:  IPEX4
Telemetry output Power: <17dBm

Firmware target: Happymodel_RX_ES915RX

Receiver protocol: CRSF

Could bind with Happymodel ES915TX , Frsky R9M and DIY ELRS TX module(need to flash the same version ELRS firmware)

Firmware flash via Betaflight pass-through

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




Bind procedure:

1. Supply power to CrazyF4 ELRS flight controller (Plug the USB), wait until the RX LED is off, immediately turn off the power (Unplug the USB), and then repeat the above steps again. When the RX is powered on for the third time, the LED light will start to double-flash, which means that the RX enters into the binding mode

2. Insert the ES915TX module or other DIY 2.4G ELRS TX to your OpenTX Radio transmitter, and choose External RF mode to CRSF protocol, then you can find ELRS menu from the Radio system (Need to copy the ELRS.LUA file to the SD-Card tools first), Enter into ELRS and press [Bind], theRX LED on the Flight controller will getting to be solid if bind successfully.

3. Receiver LED status meanings:

LED solid means bind successful or Connection established; LED double-flash means in bind mode; LED flash slowly means no signal established with the TX module


Notes: Dont make the antenna plug get touch with the Motor solder pins, otherwise it would burnt the ESC.











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