HappyModel X12 AIO 5-IN-1 ELRS 2.4G Flight Controller – Compact FC with Integrated ESC, VTX, and Receiver for 1-2S FPV

The HappyModel X12 AIO flight controller from the Happymodel brand is a fully integrated "5-in-1" board designed for lightweight 1-2S Whoop and mini FPV quadcopters. It combines a flight controller (FC), a four-channel ESC, a video transmitter (VTX), and a receiver (RX) in one unit, significantly saving space and weight in the build. The board weighs 5.1 g, and its mounting holes are 25.5x25.5 mm, making it compatible with typical mini-quadcopter frames.

Core and Sensors

The board is based on the STM32F411CEU6 processor and equipped with a high-precision ICM20689 gyroscope. The BF Target firmware is CRAZYBEEF4SX1280, ensuring compatibility with popular Betaflight settings and stable flight performance. For power consumption monitoring, integrated voltage and current sensors are included, with the current sensor present (Scale: 470), providing accurate battery status information.

ESC and Power

The integrated ESCs run BlHeli_S firmware and are labeled Z_H_30_REV16_7. The controller supports 1-2S (2.9-8.7V) battery power with a maximum current endurance of up to 12A, making the X12 AIO suitable for 1202-1106 size motors and less aggressive 1404 motors. An onboard 5V@1A BEC is present, and the power connector is PH2.0. Local ESC labeling also indicates 5A as the nominal for some configurations.

VTX, Antenna, and Safety

The integrated video transmitter operates under OpenVTX firmware and supports SmartAudio 2.1 and IRC Tramp control protocols. Transmission power can be switched between 25mW (14dBm), 100mW (20dBm), and 400mW (26dBm) modes; antenna connection is via a u.FL connector. Important note: the video transmitter can get very hot during prolonged operation as it is an integrated part of the board; it is not recommended to leave the board powered on for long periods without natural air circulation. Do not power on the board without an antenna connected.

ELRS Receiver and Compatibility

The model features an integrated ELRS 2.4GHz receiver, connected via SPI with a built-in SMD antenna. The receiver is fully compatible with ELRS 2.0; for ELRS 3.0 operation, the latest Betaflight 4.4 version is required. This configuration makes the board ideal for modern 1-2S builds with high functionality and low weight.

Advantages and Applications

• Compactness: FC, ESC, VTX, and RX are integrated into one compact module with a minimal weight of 5.1 g.
• Flexibility: suitable for various receiver options and supports ELRS TX module 2.0.
• Battery Monitoring: integrated voltage and current sensors with a scale of 470 for precise power consumption control.
• Powerful ESCs: 1-2S operation with support up to 12A, compatible with 1202-1106 motors and even 1404 for calmer configurations.
• High-Quality Video Transmission: OpenVTX with power selection from 25 to 400 mW and support for SmartAudio 2.1 / IRC Tramp.

Technical Specifications

• Processor: STM32F411CEU6
• Gyroscope: ICM20689
• BF Target: CRAZYBEEF4SX1280
• ESC: Z_H_30_REV16_7
• ESC Firmware: BlHeli_S
• Mounting Holes: 25.5x25.5 mm
• Input Voltage: 1-2S (2.9-8.7V)
• Current Sensor: YES - Scale: 470
• BEC: 5V@1A
• ESC (Power): 5A (local labeling) and support up to 12A
• VTX FW: OpenVTX
• VTX Protocol: SmartAudio 2.1 / IRC Tramp
• VTX Power: 25mW (14dBm), 100mW (20dBm), 400mW (26dBm)
• Power Connector: PH2.0
• Weight: 5.1 g

Package Contents

• 1x Board
• 1x Linear Antenna
• 1x Screw Set
• 1x Soft Mounting Kit
• 1x PH2.0 Connector with Cable

This board is ideal for enthusiasts building lightweight and agile 1-2S Whoop drones or mini-quadcopters who are looking for a compact, functional solution with an integrated VTX and ELRS receiver. Manufacturer: Happymodel. Product Category: Drones & Quadcopters > Drone Components > Drone Spare Parts > Stacks (FC+ESC).

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