Happymodel CrazyG473 V1.0 AIO 5in1 (FC+ESC+ELRS RX+VTX)

Happymodel Crazybee G473 AIO 5in1 is the first AIO board from Happymodel based on the STM32G473 microcontroller. It combines a flight controller, ESCs, ELRS receiver, video transmitter, and OSD chip for analog video into a compact unit ideal for small 65 mm 1S FPV drones. The board also includes a current sensor and a 5V/2A BEC.

The flight controller uses the STM32G473CEU6 processor and an ICM42688P gyro, along with 16MB of memory for Blackbox. The ESCs support up to 5A and use Bluejay firmware. The board features a full integrated ELRS receiver operating on 2.4GHz, connected via UART and compatible with Happymodel EP1/EP2 firmware. The antenna is made from 31mm copper wire.

Video transmission is handled by the integrated OpenVTX supporting 48 channels in the 5.8GHz band. The output power is adjustable between 10–400mW, and the transmitter can be controlled via the flight controller using the SmartAudio 2.1 protocol. The antenna connects via a u.FL connector. The VTX operates only when the battery is connected, and the power reduces when the drone is disarmed to prevent overheating.

The entire unit weighs approximately 3.8 g (without pigtail and antenna) and has a mounting hole spacing of 25.5×25.5 mm. The board is exclusively designed for 1S LiPo power and optimized for small FPV drones, emphasizing low weight and simple integration. To reduce weight, the USB connector is external and connects via an SH1.0 connector.

Betaflight firmware is currently not available directly in the configurator. Firmware version V4.6 can be downloaded here.

CLI Dump

Board layout