Happymodel CrazyF411 ELRS AIO Flight Controller

Short Description:

Happymodel CrazyF411 ELRS AIO flight controller combines an STM32F411, UART 2.4GHz ExpressLRS receiver, four 20A ESC channels, SPI OSD and 2–4S input for toothpick builds.

Product Name: Happymodel CrazyF411 ELRS AIO Flight Controller
Product Type: 4-in-1 AIO flight controller with integrated ESC, UART receiver and OSD
MCU: STM32F411CEU6, 100 MHz, 512 KB flash
Gyroscope: SPI-connected gyro/accelerometer; exact sensor IC varies by production batch
ESC Continuous Current: 20 A per motor channel
OSD Chip: AT7456E, SPI-controlled analog OSD
Firmware: Betaflight (FC), Bluejay (ESC) and ExpressLRS (receiver)
Firmware Target: CRAZYBEEF4DX for the flight controller
Receiver Protocol: UART 2.4 GHz ExpressLRS, CRSF
Input Voltage: 2–4S LiPo

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Product Detail

FAQ

Technical Highlights

Integrated Toothpick Flight Electronics

The CrazyF411 ELRS AIO combines an STM32F411 flight controller, four ESC channels, a UART-based 2.4 GHz ExpressLRS receiver and analog OSD on one compact board.

20 A Four-Channel ESC

Each built-in ESC channel is specified for 20 A continuous current and 25 A peak current for 5 seconds. Happymodel lists Bluejay as the factory-installed ESC firmware and DSHOT150, DSHOT300 and DSHOT600 as supported signal protocols.

UART ExpressLRS Receiver

The onboard 2.4 GHz ExpressLRS receiver communicates with the flight controller over UART using CRSF. It uses an IPEX antenna connector; an antenna is shown with the board in the supplied product images.

Gyro Revision Requires Verification

Happymodel lists different SPI gyro/accelerometer ICs across production revisions. Confirm the sensor on the actual batch before selecting a Betaflight firmware build or custom gyro definition.

Flight Controller and ESC Specifications

Flight Controller MCU	STM32F411CEU6, 100 MHz, 512 KB flash
Gyro/Accelerometer Interface	SPI; sensor IC depends on production revision
Analog OSD	AT7456E, SPI-controlled Betaflight OSD
FC Firmware Target	CRAZYBEEF4DX
ESC Configuration	Integrated four-channel BLHeli_S-compatible ESC
ESC Continuous Current	20 A per channel
ESC Peak Current	25 A per channel for 5 seconds
Factory-Listed ESC Firmware	Bluejay 0.18.1; verify the firmware on the supplied batch
ESC Signal Protocols	DSHOT150, DSHOT300 and DSHOT600

Receiver, Power and Dimensions

Onboard Receiver	UART 2.4 GHz ExpressLRS, CRSF protocol
Receiver Antenna Connector	IPEX
Power Input	2–4S LiPo
Onboard BEC	5 V, 1.5 A
Mounting Pattern	25.5 × 25.5 mm, M2
Board Size	32 × 28 × 9 mm

Selection and Setup Notes

Confirm whether the actual board uses an ICM42688P, BMI270 or newer LSM6DSV16X sensor before flashing Betaflight. Happymodel provides additional firmware instructions for its LSM6DSV16X revision.
The onboard ExpressLRS receiver occupies UART2 in the manufacturer wiring diagram. Plan connections to other serial peripherals accordingly.
The board includes analog OSD, but a video transmitter is not identified as part of this AIO board.
Check the motor current demand, 2–4S battery selection and 5 V peripheral load against the stated ESC and BEC ratings before installation.

FAQ

Does this board include a 2.4 GHz ExpressLRS receiver?

Yes. The CrazyF411 ELRS AIO has an onboard UART-based 2.4 GHz ExpressLRS receiver that communicates with the FC using CRSF.

Is the 20 A ESC rating for the whole board or each motor channel?

Happymodel specifies 20 A continuous current per ESC channel, with 25 A peak per channel for 5 seconds.

Which gyroscope IC is installed?

The exact IC depends on the production revision. Happymodel documents ICM42688P or BMI270 in earlier specifications and LSM6DSV16X for newer boards. Verify the actual board before flashing firmware.

Does built-in OSD mean the board also includes a video transmitter?

No. The board has analog OSD capability, but the specified integrated functions do not include a video transmitter.

What battery and mounting pattern does it use?

It is specified for a 2–4S LiPo supply and a 25.5 × 25.5 mm M2 mounting pattern.

B2B Procurement FAQ

Can the gyro revision be confirmed before a bulk order?

Request confirmation of the actual batch's gyro IC and corresponding Betaflight firmware requirements during quotation. The supplied photos alone do not establish the sensor revision.

Are the antenna and installation accessories included?

An antenna, battery lead, mounting pieces and motor connectors are shown in the supplied product images. Confirm the exact packing list for the quoted batch before purchase.

Are samples, MOQ or customization available?

Sample availability, MOQ and customization options are not specified in the supplied product evidence and must be confirmed during quotation.

What lead time and warranty apply?

Lead time and warranty terms must be confirmed for the quoted batch; no commitments are established by the supplied product images.