Radiomaster AX12 ELRS 868MHz/2.4GHz Android

Radiomaster AX12 is a brand-new RC radio transmitter that combines a conventional transmitter with an ELRS module and the performance of an Android device. The radio uses the RadioMasterOS system based on Android 9.0, allowing you to install apps directly on the transmitter. In addition to standard model control, this makes it possible to use apps for model configuration, telemetry, or a ground station directly on the radio display. The radio is a "game changer", especially for drones using ELRS and Ardupilot firmware with GCS, and for FPV pilots using the DJI O4 system who need HDMI output.

At first glance, the large 5.5" HD IPS touchscreen with a resolution of 1280×720 pixels and brightness of up to 1000 nits stands out, offering excellent readability even in direct sunlight. The radio is powered by an octa-core processor with 4GB RAM and 64GB storage.

The Radiomaster AX12 is equipped with X5 Hall gimbals with contactless sensors for precise and stable control. The transmitter is also compatible with aluminum AG01 Nano gimbals. The sticks can be unscrewed and stored inside the radio body for easier transport. Model control is provided by 4× three-position switches, 2× two-position buttons, 2 analog dials, and a programmable six-position switch. All controls can be freely mapped in the software.

The transmitter uses an integrated ExpressLRS module based on the LR1121 chip, supporting both 2.4GHz and 868/915MHz bands. Maximum output power is 250mW. The module provides low latency and a stable RC link. The radio supports up to 16 channels and offers advanced mixing options, custom control curves, adjustable dual rates, and channel locking.

A major advantage of the AX12 is support for MAVLink passthrough, allowing apps such as QGroundControl or configuration tools for flight controllers to be used on the transmitter. The Android environment allows compatible apps to be installed from Google Play or using APK files. The radio can therefore function as both an RC transmitter and a ground station. It supports apps such as DJI Fly, QGroundControl, Betaflight Configurator, and more.

The Radiomaster AX12 is also equipped with an HDMI input, allowing video from digital FPV systems such as Walksnail Avatar/Ascent, HDZero, or OpenIPC/RubyFPV to be displayed directly on the radio screen. Conversely, the HDMI output can mirror the transmitter display to an external monitor. Thanks to the USB-C OTG connection, video from DJI Goggles can also be displayed directly on the transmitter screen through the DJI Fly app. 

On the back of the radio, there is a Nano module bay for optional expansion with an external transmitter module. The transmitter also features a built-in speaker and a 3.5mm audio output for headphones. Connectivity is provided by Wi-Fi, Bluetooth, and a USB-C connector for data transfer. 

The AX12 is powered by an integrated pair of 21700 Li-Ion batteries with a total capacity of approximately 10,000 mAh, providing long runtime when using apps and transmitting at full power. Charging is via the bottom USB-C connector using a power supply supporting the Power Delivery protocol.

Radiomaster QGroundControl