HappyModel CrazyF411 ELRS AIO 4in1 F411 Flight Controller Built-in UART 2.4G ELRS RX 20A ESC 2-4S

*”ET”and “ER” pads are used for communication with ESP8285, you can connect
“TX” of FTDI tool to “ET” pad and connect “RX” of FTDI tool to “ER” pad
for upgrade onboard UART ELRS receiver firmware. Need to short connect
“+5V” and “E5” pads before that.

The
CrazyF411 ELRS flight controller comes with integrated UART 2.4GHz
ExpressLRS receiver and 20A Blheli_s ESC(Bluejay firmware pre-installed)
which could support 2-4s. Bigger Mosfet could support high to 20A
currents would be better for 2-4S toothpick drone or long range FPV
drone. 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. The built-in ELRS receiver is UART communication with
MCU, it’s the same like Happymodel EP1 which you can update firmware by
betaflight pass-through or WIFI, very simple. The default firmware is
ELRS V3.0.1. This flight controller would be used for Crux35 to instead
ELRS X1 flight controller.

Specifications:

Flight controller

MCU:STM32F411CEU6 (100MHZ, 512K FLASH)
Sensor: ICM42688P or BMI270 (SPI Control)
Mount pattern: 25.5×25.5 M2
Size:32*28*9mm
Power supply: 2-4S Lipo battery
Built-in 20A Blheli_s ESC each
Built-in Betaflight OSD(SPI Control)
Built-in UART ExpressLRS 2.4GHz receiver
Built-in 5V 1.5A BEC
Flight controller firmware target: CRAZYBEEF4DX

Onboard 4in1 ESC

MCU upgraded to EFM8BB21
Power supply: 2-4S LiPo/LiPo HV (7v/17v)
Currents: 20A continuous peak 25A (5 seconds)
Support BLHeliSuite programmable
Factory firmware: Bluejay 0.18.1Firmware target: F_H_40_48_v0.18.1
Default protocol: DSHOT150/DSHOT300/DSHOT600

Onboard UART ExpressLRS 2.4GHz Receiver

Packet Rate option: 25Hz/50Hz/150Hz/250Hz/500Hz
RF Frequency: 2.4GHzAntenna plug: IPEX
Telemetry output Power: <12dBm
Receiver protocol:  CRSF
Default firmware version: ExpressLRS V3.0.1
Firmware target:HappyModel EP1/2 2400 RX

Onboard voltage and Amperage meters  settings

Voltage meter scale setting 110
Amperage meter scale setting 470

Binding procedure:

  1. Supply
    power to the flight controller by plug USB, wait until the green LED on
    the FC is off, immediately turn off the power, and then repeat again
    the above steps. When the FC is powered on for the third time, the green
    LED light will start to double-flash, which means that the RX enters
    the binding mode

  2. Please
    make sure your ExpressLRS tx module firmware is v3.x.x. And go to
    ExpressLRS.lua from “TOOLS” menu of your radio transmitter. Then hit
    [Bind] to binding with the onboard ExpressLRS receiver. The green LED
    should blinking slowly first then turn to solid, that means binding was
    successfully. If the green led still keep double flash after binding
    ,please change Model Match tab value from “off” to “on” or from “on” to
    “off”

Receiver LED status meanings:

Green
LED solid means bind successful or RC link established; Green LED
double-flash means get into bind mode; Green LED flash slowly means no
RC signal input from TX module; Green LED continuous flash fast means
ExpressLRS wifi enabled.

Bind successful  Bind mode No RC Input Wifi mode