The Happymodel ExpressLRS CrazyF4 is the world's first AIO 5-in-1 whoop flight controller with a built-in high-performance 900MHz ELRS receiver. This F4 flight controller has a built-in 5A ESC, 5.8GHz VTX, and OSD. This AIO is made for 1S long-range and tiny whoops.

VIDEO: ELRS CrazyF4 5-in-1 AIO build video | Happymodel

Features

• Onboard High-performance 900Mhz Serial Based ELRS Receiver
• Onboard Voltage and Amperage meters
• World's first 5-in1 AIO FC w/ Receiver
• Onboard 4-in-1 ESC
• F4 Flight Controller

Specifications

ELRS RECEIVER

• Bind with: Happymodel ES915TX, Frsky R9M, and DIY ELRS TX module(need to flash the same version ELRS firmware)
• Telemetry output Power: <17dBmFirmware target: Happymodel_RX_ES915RX
• RF Frequency optional: 915mhz or 868mhz(EU)
• Firmware flash via Betaflight pass-through
• Operation current: ~100Ma
• Antenna connector: IPEX4
• Rx To FC protocol: CSRF
• Receiver protocol: CRSF

CrazyF4 FC

• Built-in Serial-based ExpressLRS 900MHz receiver(915MHz or 868MHz optional)
• Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready
• Flight controller firmware target: CRAZYBEEF4DX
• MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
• Power supply: 1S battery input (DC 2.9V-4.35V)
• Sensor: MPU-6000(SPI connection)
• Built-in Betaflight OSD(SPI Control)
• Original whoop size compatible
• Built-in 5V 1A BEC
• Built-in 5.8G VTX

VTX

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

ESC

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

VOLTAGE METERS

• Amperage meter scale setting 1175
• Voltage meter scale setting 110

Binding Procedure

1. Supply power to the 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 900MHz ELRS TX to your OpenTX Radio transmitter, and choose External RF mode to CRSF protocol, then you can find the 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], the RX LED on the Flight controller will getting to be solid if bind successfully.
3. Receiver LED status meanings: LED solid means to bind successful or Connection established; LED double-flash means in bind mode; LED flash slowly means no signal established with the TX module

• Note: Do not allow the antenna plug to touch the Motor soldering pins, as it may burn the ESC.

Includes

• 1x Happymodel ExpressLRS CrazyF4 5-in-1 AIO FC w/ Built-in 900MHz ELRS Rx
  
• 1x Connecting Wire
• 4x Damping Balls
• 1x 3-Pin Wire
• 5x Screws