Happymodel X12 ExpressLRS ELRS F4 12A 5-in-1 AIO FC 1-2S

The Happymodel X12 ExpressLRS F4 12A 5-in-1 AIO is a compact all-in-one flight controller designed for high-performance 1-2S builds, including Tiny Whoops and Toothpick quads. It combines a powerful F4 flight controller, 12A 4-in-1 ESC (BLHeli_S), 2.4GHz ExpressLRS SPI receiver, 5.8GHz 40CH VTX (25–400mW), and Betaflight OSD—all on a 25.5×25.5mm whoop-style board.

The integrated SPI-based ExpressLRS receiver uses the SX1280 RF chip for reliable long-range control with low latency and supports up to 500Hz packet rate. The built-in ESCs support DShot and Bluejay firmware, and the onboard VTX is SmartAudio-ready for full control via Betaflight.

Ideal for lightweight race or freestyle setups, the X12 delivers solid performance in an ultra-compact package.

Features:

• All-in-one design: FC, ESC, ELRS receiver, VTX, and OSD on a single board
• STM32F411 MCU with 100MHz and 512KB flash
• ICM20689 gyro (SPI) for low-noise, high-speed IMU performance
• Built-in 12A (15A peak) 4-in-1 BLHeli_S ESC supporting DShot and Bluejay
• Onboard SPI ExpressLRS 2.4GHz receiver with SX1280 chip
• Supports ELRS packet rates up to 500Hz
• Integrated 5.8GHz 40CH VTX with switchable power: 25mW / 100mW / 200mW / 400mW
• Betaflight OSD via SPI
• SmartAudio VTX control
• Compact 25.5×25.5mm whoop-style mounting pattern
• Compatible with 1S–2S LiPo / LiHV batteries
• Lightweight and ideal for Tiny Whoop racing or Toothpick freestyle builds

Note: Do not allow the antenna plug to touch the Motor soldering pins, as it may burn the ESC.