Happymodel X12 ELRS Pro V1.1 1-2S 5-in-1 AIO Flight Controller

The Happymodel X12 ELRS Pro V1.1 puts a flight controller, 4-in-1 ESC, ELRS receiver, 5.8GHz video transmitter and Betaflight OSD on one 5.1 g board. It suits 1S and 2S brushless whoops and micro builds that use the 25.5 × 25.5 mm whoop mounting pattern, cutting the wiring down to motors, camera and battery.

Key features

• STM32F411 processor with an ICM42688P gyro on SPI, running Betaflight (STM32F411 target)
• 12A continuous (15A for 3 s) 4-in-1 ESC on 1–2S LiPo/LiHV, factory-flashed with Bluejay 0.19.2 and DShot300 by default
• UART ELRS 3.0 receiver (ESP32-PICO-D4) with CRSF output and telemetry; its firmware can be updated over Wi-Fi
• 5.8GHz OpenVTX, 40 channels, switchable 0/RCE/25/100/400mW with pit mode and a U.FL antenna connector
• Onboard voltage and current sensors for battery readouts in the OSD

Specifications

• MCU: STM32F411CEU6, 100 MHz, 512K flash
• Gyro: ICM42688P (SPI)
• Firmware target: Betaflight STM32F411
• Input: 1–2S LiPo/LiHV (2.9–8.7V)
• ESC: 12A continuous, 15A peak (3 s), Bluejay 0.19.2, DShot300 default
• Receiver: ELRS 3.0, 2.4GHz, serial CRSF, 50/150/250/500Hz packet rates, SMD antenna
• VTX: OpenVTX, 40 channels, 0/RCE/25/100/400mW, MSP control
• OSD: Betaflight OSD (SPI)
• Sensors: Voltage (scale 110), current (scale 470)
• Mounting: 25.5 × 25.5 mm
• Size: 30 × 30 × 8 mm
• Weight: 5.1 g

The receiver runs ELRS 3.x, so your transmitter module needs ELRS 3 firmware to bind; the standalone receiver target in the ELRS flasher is HappyModel AIO 2.4GHz RX+VTX, available from ELRS 3.4.0. Happymodel recommends an ESC startup power of 1100 minimum and 1200 maximum.