RadioMaster AX12 Remote Controller

1. Introduction

Thank you for choosing the RadioMaster AX12 Remote Controller. This advanced system combines RadioMaster's proven radio control with RadioMasterOS, an Android-based platform, offering unparalleled flexibility and control for various applications. The AX12 features built-in ExpressLRS connectivity, a vibrant 5.5-inch HD touchscreen, HDMI video capabilities, and powerful computing, making it a versatile tool for pilots, filmmakers, and innovators.

To ensure proper and safe use of this product, please read this instruction manual carefully before operation. For additional resources and the latest firmware updates, please visit the official RadioMaster website.

2. Safety Information

WARNING: Always exercise extreme caution when operating radio-controlled models. Many models are equipped with powerful motors and sharp spinning propellers that can cause serious injury. Always ensure power is disconnected from your models and remove propellers when performing maintenance or adjustments.

2.1 Operating Conditions to Avoid

Do not operate the AX12 remote control system under the following conditions:

• In severe weather or strong windy conditions, such as rain, hail, snow, storms, or electromagnetic environments.
• In any situation where visibility is limited.
• In areas where people, property, high-voltage power lines, public roads, vehicles, or animals may be present.
• If you feel tired or unwell, or under the influence of drugs or alcohol.
• If the remote control or model appears damaged or is not working properly.
• In areas with high 2.4GHz or 900MHz interference, or where these radio frequencies are prohibited.
• When the radio's battery voltage is too low to be used.
• In areas where local regulations prohibit the use of models.

3. Setup

3.1 Package Contents

Carefully unpack your RadioMaster AX12 and check that all items are present. If anything is missing or damaged, please contact your retailer.

Figure 3.1: AX12 Package Contents

• 1 * AX12 Radio Controller
• 1 * AX12 Signature Carry Case
• 1 * Type-A to Type-C USB Cable
• 1 * Type-C to Type-C USB Cable
• 1 * Screen Protector
• 1 * 1.5mm Hex Wrench
• 4 * Low Tension Gimbals Springs
• 2 * AX12 Gimbal Dust Cover
• 1 * RadioMaster Sticker Set
• 1 * AX12 Manual
• 1 * Inventory Card

3.2 Battery & Charging

The AX12 features a built-in lithium battery with USB-C charging capability. The charging circuit is designed exclusively for the internal lithium-ion battery, which has a nominal voltage of 3.7V and a maximum charging voltage of 4.2V.

• Please use a standard USB 5V charger with a minimum requirement of 5V/2A. You may use a USB 5V charger with an output current higher than 2A. Note that some smartphone chargers with proprietary fast-charging protocols may not be compatible.
• Regularly check the battery's voltage and condition, and never charge it unattended.
• Always charge in a safe area away from flammable materials.
• Do not charge the transmitter if it gets wet or is damaged in any way.

3.3 Antenna Separation Distance

When operating your RadioMaster transmitter, please be sure to maintain a separation distance of at least 20 cm between your body (excluding fingers, hands, wrists, ankles, and feet) and the antenna to meet RF exposure safety requirements as determined by FCC regulations.

3.4 Gimbal Stick Storage and Adjustment

The AX12 gimbals feature removable grips for convenient stick storage. You can also adjust the tension of the gimbal sticks:

• Vertical Tension: Turn clockwise (CW) to increase, counter-clockwise (CCW) to decrease.
• Horizontal Tension: Turn clockwise (CW) to increase, counter-clockwise (CCW) to decrease.

Figure 3.2: AX12 Gimbal Stick Detail

4. Operating Instructions

4.1 Controller Layout

Familiarize yourself with the controls and ports of your AX12 remote controller.

Figure 4.1: AX12 Controller Layout (Quick Start Guide)

• Top Panel: Mini HDMI In, Mini HDMI Out, SC 3-Position Switch, SB 3-Position Switch, SD Latching Switch, S2 Dial, Headphone Jack, Type-C USB Port, DSC Simulator Port.
• Bottom Panel: USB-C Charge Only Port.
• Front Panel: 6 Programmable Buttons, T3 Trim, Left Gimbal, Power Button, T4 Trim, Lanyard Loop, T2 Trim, Right Gimbal, T1 Trim, Speaker, 5.5-inch HD Touchscreen.
• Rear Panel: SE 3-Position Switch, SF 3-Position Switch, Nano External Module Bay.

4.2 Main Screen Display

The default home page provides essential real-time information:

• Joystick Position: Graphical real-time display of joystick position.
• Model Name and Image: Displays the current model name and image.
• Channel Output: Real-time display for channels CH01-CH08.
• Switches: Displays all switch positions in real time.
• Pots: Displays the knob position in real time.
• 6-Position Buttons: Real-time display of 6 button positions.

4.3 Top Bar Display

The top bar provides status indicators:

• Signal Strength: After pairing, view signal status and return link quality.
• Device Name: Displays the device name, customizable in system settings.
• Aircraft Terminal Voltage: When using a receiver with voltage feedback, displays battery voltage at the aircraft terminal.
• Remote Control Voltage: Displays the real-time voltage of the remote control.
• Date: Displays the current date.

4.4 Bottom Bar Display

The bottom bar provides quick access to key functions:

• System Settings: Enter System Settings.
• Model Settings: Enter Model Settings.
• Lock Screen: Lock the Screen.
• Home Screen: Tap to return to Main Interface.
• Help: Tap to display Help and Settings.

4.5 Timer Settings

The AX12 includes configurable timers (T1/T2). Tap the gear icon next to the timer display to enter settings:

• Activation Mode: Options include always-on, switch-triggered functions, and more.
• Activation Switch: Set timer activation switch.
• Start Time: When 00:00:00, it functions as a count-up timer. Otherwise, it switches to countdown mode.
• Countdown: Optional countdown announcement methods (mute, beep, voice prompts).
• Interval: Countdown notification interval.
• Reset Switch: Set the timer reset switch.

4.6 ExpressLRS Configuration

The ELRS page allows you to view and configure all ELRS functions, turn the ELRS RF module (transmitter) on/off, and select between the built-in or external ELRS module. You can also update the built-in ELRS RF module via the USB port on top of the transmitter.

4.7 Android Operating System (RadioMasterOS)

The AX12 runs RadioMasterOS, an Android 9.0-based operating system. It is Google Play certified and supports full APK sideloading, allowing you to install compatible ground station, configuration, and utility apps directly on the radio.

Figure 4.2: AX12 Running Android Operating System

The octa-core processor, 4 GB of RAM, and 64 GB of storage deliver smooth performance for control tasks, telemetry viewing, supported ground station apps, and multitasking. This enables seamless integration with popular tuning and mission apps.

Figure 4.3: App Integration for Tuning and Missions

4.8 HDMI Input & Output

The AX12 offers versatile video connectivity:

• HDMI Input: Supports video from compatible digital video systems directly on the AX12 display. For example, with the DJI Fly app and a simple USB-C OTG connection, the AX12 can display the live video feed from DJI goggles.
• HDMI Output: Mirror or extend the display to an external monitor or projector for teaching, review, or team use.

Figure 4.4: HDMI Input & Output Ports

4.9 Bluetooth & Wi-Fi Connectivity

The AX12 features built-in Bluetooth and Wi-Fi for enhanced functionality:

• Bluetooth: Connect wireless headphones for audio feedback and alerts.
• Wi-Fi: Perform full ExpressLRS firmware and configuration updates directly from the radio, eliminating the need for a computer.

Figure 4.5: Bluetooth + Wi-Fi Connectivity

5. Maintenance

• Cleaning: Use a soft, dry cloth to clean the controller. Avoid using solvents or abrasive cleaners.
• Storage: Store the AX12 in its signature carry case when not in use to protect it from dust, moisture, and physical damage. Avoid storing in extreme temperatures.
• Battery Care: Regularly check the battery's voltage and condition. Do not store the controller with a fully depleted battery for extended periods.

6. Troubleshooting

6.1 Firmware Updates

The AX12 supports online automatic firmware updates via Wi-Fi. Ensure your controller is connected to a stable Wi-Fi network to perform updates. Regularly check for updates to benefit from the latest features and improvements.

6.2 Android System Issues

The Android system is a completely open operating system. Please ensure that you do not install or use any apps from untrusted sources. Apps of unknown origin may cause the Android system to malfunction, preventing you from using the remote control normally.

6.3 General Issues

• Controller Not Powering On: Ensure the battery is charged. Connect to a USB-C charger and check for charging indicators.
• No Signal to Receiver: Verify that the controller and receiver are properly bound. Check the ExpressLRS settings and ensure the internal RF module is active.
• Screen Unresponsive: Try restarting the controller. If the issue persists, ensure no physical damage to the screen.

7. Specifications

Here are the detailed specifications for the RadioMaster AX12 Remote Controller:

Figure 7.1: AX12 Specifications Overview

8. User Tips

• Local Regulations: Before purchasing or operating, always check local regulations regarding radio frequencies (e.g., 2.4GHz, 900MHz) and any import restrictions for specific configurations in your country.
• Controller Mode: The AX12 is configurable for different modes (e.g., Mode 1, Mode 2) via software settings. Refer to the system settings for adjustments.
• Firmware Updates: Regularly update your controller's firmware via Wi-Fi to ensure you have the latest features, bug fixes, and performance improvements.

9. Warranty and Support

If you encounter any problems with your remote control hardware, please retain your proof of purchase and contact the retailer from whom you purchased the AX12. For additional support and warranty information, you may also visit the official RadioMaster website: www.radiomasterrc.com/pages/contact

A PDF version of the user manual (Quick Start Guide) is available for download: AX12 Quick Start Guide (PDF).

10. Compliance Information

10.1 EU Simple Declaration of Conformity

RadioMaster declares that the radio equipment AX12 is in compliance with EU directives Directive 2014/53/EU.

Manufacturer: ShenZhen RadioMaster Co., Ltd

10.2 FCC Information

FCC ID: 2BUHG-AX12

This equipment has been tested and found to comply with the limits for Part 15 of the FCC rules. This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

10.3 California Proposition 65 Warning

⚠ WARNING: This product can expose you to chemicals including phthalates (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.