The CrazyF4 is a 5in1 flight controller integrating the long range Express LRS receiver, 5A ESC, 5.8Ghz VTX and OSD all powered by a F411 MCU.

Long gone are the days of your whoop/toothpick having limited range thanks to the ELRS system built into this flight controller.

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: 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 ELRS 868Mhz Receiver

• Operation current: ~100Ma
• Rx To FC protocol: CSRF
• RF Frequency: 868mhz(EU)
• Antenna connector: IPEX4
• Telemetry output Power: <17dBmFirmware target: Happymodel_RX_ES915RX
• Receiver protocol: CRSF
• Could bind with Happymodel ES868TX , 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) 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.