Happy Model – X12 ELRS Pro v1.1 5-IN-1 AIO flight controller built-in 2.4G ELRS V3.0 and OPENVTX

Building a featherweight FPV whoop or toothpick and tired of wiring spaghetti? The Happymodel X12 ELRS Pro V1.1 is here to declutter your life (or at least your drone build). This isn’t just a flight controller; it’s a highly integrated 5-in-1 AIO (All-In-One) powerhouse packing an F411 FC, a 12A Blheli_S ESC, a built-in OpenVTX, AND a UART ExpressLRS receiver onto a single, tiny board.

What makes the “Pro V1.1” special? It utilizes a dedicated ESP32 chip to manage the onboard VTX and the super-reliable UART ExpressLRS V3.0 receiver. This frees up the main STM32F411 processor to focus purely on flight performance and gives you back a precious UART port compared to SPI receiver versions. Plus, updating the ELRS firmware is a breeze via WiFi!

Designed for 1-2S LiPo builds, this board features a robust 12A 4-in-1 ESC (running smooth Bluejay firmware out of the box) and a capable OpenVTX switchable up to 400mW via Betaflight OSD/MSP control. With its standard 25.5×25.5mm whoop mounting pattern and weighing only 5.1 grams, it’s the perfect brain for your next agile micro FPV drone.

Search Terms You Might Have Used (Welcome aboard!): AIO Flight Controller, Whoop FC, ExpressLRS FC, Built-in ELRS Receiver, 12A ESC AIO, F411 Flight Controller, Happymodel X12 Pro, UART ELRS Flight Controller, 5-in-1 FC, OpenVTX AIO, Micro Drone FC, Toothpick Flight Controller, 1S FC, 2S Flight Controller.

Specifications:

• Brand Name: Happymodel
• Item Name: X12 ELRS Pro V1.1 AIO 5-IN-1 Flight Controller
• MCU: STM32F411CEU6 (100MHz, 512K Flash)
• Co-processor: ESP32-PICO-D4 (for ELRS RX & VTX)
• Gyro Sensor: ICM42688P (SPI connection)
• Mounting Hole Size: 25.5mm x 25.5mm
• Size: 30mm x 30mm x 8mm
• Weight: 5.1g
• Power Supply: 1-2S LiPo/LiPo HV input (DC 2.9V-8.7V)
• Betaflight Firmware Target: CRAZYBEEF4DX – check happymodels official website for latest resources, Betaflight 4.4.x recommended)

Onboard 4-in-1 ESC:

• Current Rating: 12A continuous, 15A peak (3 seconds)
• Firmware: Bluejay v0.19.2 (Factory)
• Default Protocol: DSHOT300
• Supports: BLHeliSuite

Onboard UART ExpressLRS 2.4GHz Receiver:

• Firmware Version: ExpressLRS V3.0.0
• RF Frequency: 2.4GHz
• Antenna: SMD Antenna
• Packet Rate: 50Hz/150Hz/250Hz/500Hz
• Telemetry Power: <12dBm
• Protocol: Serial-based CRSF
• Flash Method: WiFi
• ELRS Target: HappyModel AIO 2.4GHz RX+VTX (via ExpressLRS web flasher, v3.4.0 RC2+)

Onboard 5.8GHz OpenVTX:

• Firmware: OpenVTX
• Control Protocol: MSP VTX (Betaflight OSD Control)
• Features: PIT Mode, RCE Mode
• Channels: 40ch
• Transmitting Power: 0mW (PIT) / RCE / 25mW / 100mW / 400mW
• Power Supply: DC 5V
• Current Draw (5V): <650mA @ 400mW
• VTX Antenna Connector: U.FL

What’s In The Box:

• 1 x Happymodel X12 ELRS Pro V1.1 AIO Flight Controller
• Mounting Grommets & Screws (Typically)
• 1 x 5.8GHz Antenna (Typically a linear dipole with U.FL)
• Power Lead Wire/Connector (Typically PH2.0 or requires soldering)

Disclaimer: Included accessories, like the exact type of screws, grommets, antenna style, or power connector, can vary based on the supply batch from Happymodel. Always verify contents upon receipt. Ensure you use the correct Betaflight firmware target provided by Happymodel for optimal performance.

Specifications:
Brand Name: Happymodel
Item Name: X12 ELRS Pro AIO 5-IN-1 Flight controller built-in 12A ESC and OPENVTX
Betaflight firmware target:
betaflight_4.4.0_STM32F411
VTX antenna: U.FL
Weight: 5.1g
Size: 30mm*30mm*8mm