CruxF405HD ELRS 3-in-1 AIO Flight Controller – Built-in UART 2.4G ELRS & 20A ESC for Toothpick (20×20mm)

CruxF405HD ELRS 3-in-1 AIO Flight Controller – 20×20mm for Toothpick & Long-Range FPV The CruxF405HD ELRS AIO flight controller is an all-in-one solution for 3-4S Toothpick or long-range FPV drones. It integrates a 20A Blheli_S ESC, UART 2.4GHz ExpressLRS receiver, BMP280 barometer, and supports plug-and-play DJI HD equipment with a reserved 6-pin socket. Key Features: MCU: STM32F405RGT6 (168MHz, 1MB FLASH) Gyro Sensor: ICM42688 (SPI connection) Mount hole size: 20×20mm Power Supply: 3-4S LiPo (DC 11-17.4V) Built-in 20A Blheli_S 4-in-1 ESC (continuous 20A, peak 25A for 5s) Supports DSHOT150/300/600 Built-in Serial ExpressLRS 2.4GHz receiver (CRSF protocol) Packet Rate Options: 25Hz/50Hz/150Hz/250Hz/500Hz Built-in BMP280 barometer for altitude measurement Built-in 8MB blackbox, voltage & current sensors (Voltage: 110, Current: 470) Factory firmware: Bluejay 0.19.2 Reserved 6-pin socket for DJI HD plug-and-play Binding Procedure: Power the FC via USB, wait until red LED turns off, then power off. Repeat twice. On the third power-up, red LED double-flashes indicating bind mode. Use ExpressLRS.lua from your radio transmitter’s “TOOLS” menu and hit [Bind]. Red LED Status: Solid: Bind successful Double-flash: Enter bind mode Slow flash: No RC signal Continuous fast flash: ExpressLRS WiFi enabled Tri-flash: Model mismatch (adjust Model Match tab) UART Description: ELRS receiver connected to UART2 by default UART1 or UART6 can be used for MSP OSD with HD VTX UART6 can be used for GPS or other serial devices IRX6 is inverted serial RX6 for SBUS input (cannot be used simultaneously with TX6/RX6) NOTES:If you want to use Barometer and want to upgrade firmware to betaflight 4.4.x ,you need to add custom Defines “BARO_DPS310 ACC_SPI_ICM42688P GYRO_SPI_ICM42688P” from build configuration of betaflight configurator before load online firmware otherwise gyro will not working . Enabled Barometer steps:After re-flashed firmware successfully , please connect to betaflight configurator and go to CLI command ,then type the following command: resource I2C_SCL 2 B10resource I2C_SDA 2 B11set baro_bustype = I2Cset baro_i2c_device = 2save Default port settings:If you want to use DJI Radio Controller , please change to the following settings: