Product overview
The Happymodel Super F405HD ELRS AIO 3in1 is a flight controller assembly for building a 3–4S HD digital FPV whoop. It combines an STM32F405RGT6 processor, an SPI-connected ICM42688 gyroscope, a UART ExpressLRS receiver and a four-in-one ESC. Its mounting hole specification is 25mm*25mm, and a reserved six-pin socket connects DJI HD equipment. Onboard equipment includes a BMP280 barometer, blackbox storage, and voltage and current sensors. The ESC comes with Bluejay 0.19.2 installed, while the receiver has ExpressLRS V3.0.1 firmware.
The ESC supports 3–4S LiPo/LiPo HV input and carries a 20A continuous rating, with 25A peak operation limited to five seconds. The receiver occupies UART2 by default; UART1 is typically used for MSP OSD with an HD video transmitter, and UART6 can connect GPS or other serial equipment. IRX6 accepts inverted SBUS input but cannot operate simultaneously with TX6/RX6. Binding requires ExpressLRS transmitter firmware v3.x.x. Using the barometer when upgrading to Betaflight 4.4.x requires the specified custom build defines to retain gyro operation, followed by CLI configuration to enable the barometer.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer and model | Happymodel Super F405HD ELRS AIO 3in1 flight controller for HD whoops. |
| Integrated configuration | Flight controller with integrated UART 2.4GHz ExpressLRS receiver and 20A Blheli_s ESC; Bluejay firmware pre-installed; supports 3-4S batteries. |
| HD equipment connection | Reserved 6-pin socket for plug-and-play DJI HD equipment connection.For DJI HD equipment. |
| Flight controller MCU | STM32F405RGT6 (168MHZ, 1Mbyte FLASH). |
| Gyroscope | ICM42688 with SPI connection. |
| Mount hole size | 25mm*25mm. |
| Flight controller power supply | 3~4S battery input (DC 11V-17.4V).Flight controller battery input. |
| Integrated ESC architecture | Built-in Blheli_S 4in1 ESC, 20A each.20A rating for each ESC. |
| Integrated receiver connection | Built-in Serial ExpressLRS 2.4G connected to UART2 by default.Factory default connection. |
| Barometer | Built-in BMP280 barometer. |
| Blackbox | Built-in 8MBp blackbox. |
| Voltage measurement | Built-in voltage meter sensor; voltage meter scale setting 110.Onboard voltage meter configuration. |
| Current measurement | Built-in current meter sensor; amperage meter scale setting 470.Onboard current meter configuration. |
| Flight controller firmware target | BETAFLIGHTF4. |
| ESC MCU | EFM8BB21.Onboard 4in1 ESC. |
| ESC power supply | 3-4S LiPo/LiPo HV (11v/17v).Onboard 4in1 ESC power input. |
| ESC current ratings | 20A continuous; 25A peak for 5 seconds.Peak current duration: 5 seconds. |
| ESC programming support | Programmable using BLHeliSuite.Onboard 4in1 ESC. |
| ESC firmware | Bluejay 0.19.2; firmware target F_H_40_48_v0.19.2.Factory-installed ESC firmware. |
| ESC protocols | DSHOT150/DSHOT300/DSHOT600.Default ESC protocols. |
| Receiver packet rate options | 25Hz/50Hz/150Hz/250Hz/500Hz.Onboard UART ExpressLRS receiver. |
| Receiver RF frequency | 2.4GHz.Onboard UART ExpressLRS receiver. |
| Receiver antenna connector | IPEX.Onboard UART ExpressLRS receiver. |
| Telemetry output power | Less than 12dBm.Receiver telemetry output. |
| Receiver protocol | CRSF.Onboard UART ExpressLRS receiver. |
| Receiver firmware version | ExpressLRS V3.0.1.Default receiver firmware. |
| Transmitter firmware requirement | ExpressLRS transmitter module firmware must be v3.x.x.ExpressLRS transmitter module used for binding. |
| Serial integration options | UART1 is typically used for MSP OSD with an HD VTX; UART6 can connect GPS or other serial equipment.UART1 typically used with an HD video transmitter. |
| Inverted serial input limitation | IRX6 provides inverted RX6 for SBUS input; IRX6 and TX6/RX6 cannot be used simultaneously.When using IRX6 for SBUS input. |
| Firmware build and barometer setup | Add custom defines BARO_DPS310 ACC_SPI_ICM42688P GYRO_SPI_ICM42688P before loading online firmware; otherwise the gyro will not work. After reflashing, enable the barometer through CLI commands: resource I2C_SCL 2 B10; resource I2C_SDA 2 B11; set baro_bustype = I2C; set baro_i2c_device = 2; save.When using the barometer and upgrading to Betaflight 4.4.x. |
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