Happymodel ExpressLRS ELRS F4 2.4G Flight Controller 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.

Please note, this board is sold a development board and we cannot offer any software support for this product. The ExpressLRS project is still in the early days, Please only use this flight controller if you know what you are doing and are prepared to figure things out and live with beta firmware that is actively updated on a regular basis.

Specifications

Flight Controller

• MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
• Sensor: Gyro Sensor: Updated to ICM20689 since V3.1 version (previous versions use MPU6000)
• 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 (supports OpenVTX)
• Built-in SPI ExpressLRS 2.4GHz receiverBuilt-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 ELRS 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 (Requires ELRS V2.0 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) Smart audio ready

Onboard voltage and Amperage meters settings

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

Included

• 1x CrafyF4 ELRS AIO Flight Controller

Flight Controller Pinout

How to Bind

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 with the ELRS TX module inserted into your OpenTX Radio transmitter, 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], the RX LED on the Flight controller will getting to be solid if bind successfully.
3. Receiver LED status meanings:
   1. LED solid means bind successful or Connection established;
   2. LED double-flash means in bind mode;
   3. LED flash slowly means no signal established with the TX module

Important: Take care to ensure the antenna does not touch any Motor solder pins (or any other exposed pins on the FC, otherwise it would burnt the ESC.