Radiomaster AX12 ELRS 868MHz/2.4GHz Android

Radiomaster AX12 is a completely new RC transmitter that combines a traditional transmitter with an ELRS module powered by Android device. The radio uses the RadioMasterOS system based on Android 9.0, allowing users to install apps directly onto the transmitter. This means that in addition to standard model control, applications for model configuration, telemetry, or ground station can be used directly on the radio's display. The radio is a "game changer" especially for drones using ELRS and Ardupilot firmware with GCS and for FPV pilots with 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 up to 1000 nits stands out, which is easily readable even in direct sunlight. The radio is powered by a 8-core processor with 4GB RAM and 64GB storage.

Radiomaster AX12 is equipped with X5 hall sensors gimbals for precise and stable control. The transmitter is also compatible with aluminum AG01 Nano. The sticks can be unscrewed and stored in the radio body for easier transport. For model control, there is 1× 4-position switch, 2× 2-position buttons, 2 analog knobs, and 1 programmable 6-position switch. All controls can be freely mapped in software.

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

A significant advantage of the AX12 is the support for MAVLink passthrough, allowing applications like QGroundControl or configuration tools for flight controllers to be used on the transmitter. The Android environment allows installing compatible apps from Google Play or via APK files. Thus, the radio can function simultaneously as an RC transmitter and a ground station. The radio supports apps like DJI Fly, QGroundControl, Betaflight Configurator, and more.

The Radiomaster AX12 is also equipped with an HDMI input, enabling video display from digital FPV systems such as Walksnail Avatar/Ascent, HDZero, or OpenIPC/RubyFPV directly on the radio display. Using the HDMI output, the transmitter's image can be mirrored to an external monitor. Thanks to the connection via USB-C OTG, it is also possible to display image from DJI Goggles directly on the transmitter's display via the DJI Fly app.

On the back of the radio, there is a Nano bay for possible expansion with an external transmission module. The transmitter also has a built-in speaker and 3.5mm audio output for headphones. Connectivity is ensured 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 endurance while using applications and during full-power transmission. Charging is done via the bottom USB-C connector with a source that supports the Power Delivery protocol.

Radiomaster QGroundControl