1. Introduction et plusview
The RADIOMASTER MT12 is an advanced open-source surface radio controller, designed for a wide range of RC surface models including cars, trucks, and boats. It is officially supported by EdgeTX, ExpressLRS, and the Multi-module project, offering extensive customizability and versatile operation.
This manual provides essential information for setting up, operating, and maintaining your MT12 controller to ensure optimal performance and longevity.
2. caractéristiques du produit
- Internal RF Modules: Available with built-in ExpressLRS or 4in1 Multi-Protocol (MPM) RF modules.
- Processeur: Features a powerful STM32F407VGT6 with 1MB Flash.
- Système opérateur: Preinstalled with EdgeTX firmware for advanced mixing and programmability.
- Chargement : QC3.0 fast charging supporting 2.0A MAX via USB-C.
- Ergonomie: Compact design with excellent ergonomics for comfortable handling.
- Compartiment à piles : Oversized compartment supports 2 x 18650 cells or a 2S 7.4V 5000mAh battery pack (batteries not included).
- Baie de modules : Standard Nano module compartment compatible with RadioMaster Ranger Nano Module, RadioMaster RM 4in1 module, and TBS Crossfire Nano module.
- Antenne: Rotatable antenna for optimized signal.
- Personnalisation : Customizable base switches or 4-way joystick included.
- Canaux de contrôle : 16 channels as standard, expandable to 32 channels (4in1 only, requires additional 4in1 RF module and compatible receivers).
- Afficher: 128x64 Monochrome LCD for clear information display.
- Capteurs: Hall-effect wheel and trigger sensors for precise control.
3. Contenu du colis
- 1 x MT12 Surface Radio (4in1 Version)
- 1 x R85C Receiver
- 1 x Dual Switch Expansion module
- 1 x 4 Way Joystick Expansion module
- 1 x Nano Adapter
- 1 x câble USB-C
- 1 x Leather Lanyard
- 1 x Custom RadioMaster signature carry case
- 1 x 18650 Battery Tray
- 1 x protecteur d'écran
- 1 x Autocollants
- 1 x Manuel

This image displays the MT12 Surface Radio Controller along with its accessories, including the R85C receiver, dual switch and 4-way joystick expansion modules, Nano adapter, USB-C cable, leather lanyard, custom carry case, 18650 battery tray, screen protector, stickers, and the instruction manual.
4. Produit terminéview
4.1 Composants du contrôleur

This diagram illustrates the various parts of the MT12 controller, including the LCD screen, speaker, buttons (SYS, PAGE<, RTN, Power, PAGE>, MDL, TELE, SD), P1/P2 dials, T1/T2/T3/T4/T5 switches, SA/SB/SC buttons, handwheel, hand grip, lanyard loop, TYPE-C charge port, SD button, external module bay, antenna, throttle trigger, USB port, AUX port, 3.5mm headphone jack, DSC trainer port, trigger position adjustment, and trigger spring adjustment.

Cette image offre une vue claire view of the front and left side of the MT12 controller, showcasing the screen, main control buttons, and the steering wheel.

This image highlights the right side of the MT12 controller, focusing on the steering wheel, throttle trigger, and accessible switches.

L'arrière view of the MT12 controller shows the battery compartment cover and the USB-C charging port at the base.

This close-up image details the throttle trigger mechanism, including the screws for adjusting its position and spring tension.

Cette image fournit un aperçu détaillé view of the MT12's monochrome LCD screen and the surrounding control buttons, which are used for menu navigation and settings adjustments.
4.2 Dimensions physiques

The diagram shows the physical dimensions of the MT12 Surface Radio Controller: 177.8mm (height) x 118.4mm (width) x 207.8mm (depth).
5. Spécifications
5.1 MT12 Surface Radio
- Dimensions physiques : 177.8 x 118.4 x 207.8 mm
- Poids: 480 grammes
- Fréquence de fonctionnement : 2.400 GHz à 2.480 GHz
- Options RF internes : Multiprotocole 4 en 1 / ELRS 2.4 GHz
- Protocoles pris en charge : Dépendant du module
- Courant opérationnel : 160mA for 4in1 / 320mA for ELRS
- Vol opérationneltage: DC 6.6-8.4V
- Système opérateur: EdgeTX
- Canaux de contrôle : 16 standard, expandable to 32 (4in1 only)
- Afficher: Écran LCD monochrome 128x64
- Batterie: 2 x 18650 cells or a 2S 7.4V 5000mAh battery pack (not included)
- Chargement : Chargement USB-C intégré
- Mise à jour du firmware: Par USB ou carte SD
- Wheel and Trigger Sensor: Effet Hall
- Baie de modules : Taille nano (module RadioMaster Ranger Nano / module RadioMaster RM 4in1 / module TBS Crossfire Nano)
5.2 R85C Receiver (Included with 4in1 version)
- Alimentation: 4.5 - 8.4 V CC
- Gamme de fréquences : 2400-2483.5 MHz
- Protocole de support: D8/D16/SFHSS
- Canal de sortie : PWM 5 canaux
- Type d'antenne : High-sensitivity 2.4G antenna
- Puissance de télémétrie : 100 mW / 20 dBm
- Poids: 5.7 grammes
- Dimensions: 31.0 x 18.5 x 13.0 mm
6. Installation
6.1 Installation de la batterie
The MT12 controller uses 2 x 18650 cells or a 2S 7.4V 5000mAh battery pack. Ensure correct polarity when inserting batteries into the provided tray or connecting a LiPo pack.
6.2 Liaison du récepteur
To establish communication between the MT12 controller and the R85C receiver, a binding process is required. Refer to the detailed steps in the included manual for your specific receiver type (R85C or ER3C-i).
For receivers with built-in gyro functionality, ensure the gyro is activated and configured correctly after binding. The sensitivity of the gyro can often be adjusted via a potentiometer on the receiver or through the controller's menu.
This video illustrates how to activate and configure the gyro function on a compatible receiver. It covers switching the receiver to gyro mode, checking the gyro phase, and adjusting sensitivity. While the video features a Radiolink receiver, the principles for gyro setup are generally applicable to the MT12's R85C or ER3C-i receivers.
7. Fonctionnement
7.1 Basic Controls and Adjustments
The MT12 controller features a standardized button layout for intuitive operation. The LCD screen provides real-time information and access to various settings. Use the navigation buttons and dials to adjust parameters such as steering trim, throttle trim, dual rates, and exponential curves.
This video showcases the features and menu system of a similar advanced RC transmitter. It highlights aspects like internal battery design, USB-C interface, trainer mode support, and customizable UI. While not the MT12, it offers insights into the capabilities and user experience of modern RC controllers.
This video provides a visual demonstration of the MT12 Surface Radio Controller, showcasing its design, button layout, and key features like the EdgeTX operating system, internal RF modules, Hall sensors, and customizable inputs. It offers a good visual reference for the controller's capabilities.
7.2 Advanced Settings (EdgeTX)
The EdgeTX firmware allows for advanced programming, including:
- Mémoire du modèle : Stockez jusqu'à 30 configurations de modèles différentes.
- Dual Rates (D/R): Adjust the maximum travel of steering and throttle channels.
- Exponentielle (EXP) : Fine-tune the sensitivity around the center stick position for smoother control.
- ABS Braking: Program an Anti-lock Braking System to prevent wheel lock-up during hard braking, improving control.
- Channel Reversing: Reverse the direction of any channel to match your servo setup.
- End Points (EPA): Set the maximum travel limits for each servo.
- Télémétrie: Surveiller le volume de la batterietage, signal strength (RSSI), and other data from compatible receivers.
This video offers an in-depth look at the features and menu system of the Flysky FS-G11P transmitter. It covers aspects like design, controls, battery installation, and menu navigation for various settings such as reversing channels, adjusting end points, and setting up ABS braking. While a different brand, the demonstrated functionalities are common in advanced RC controllers like the MT12.
8. Entretien
- Nettoyage: Regularly clean the controller with a soft, dry cloth. Avoid using harsh chemicals or solvents.
- Stockage: Store the controller in a cool, dry place away from direct sunlight and extreme temperatures. Remove batteries if storing for extended periods.
- Mises à jour du micrologiciel : Periodically check the RADIOMASTER website for firmware updates to ensure optimal performance and access to new features. Updates can be performed via USB or SD card.
- Entretien de la batterie: Follow proper charging and discharge procedures for your chosen battery type (18650 cells or LiPo pack) to maximize battery life and safety.
9. Dépannage
- Pas d'alimentation : Check battery installation and charge level. Ensure the power switch is in the ON position.
- Aucun problème de signal/liaison : Re-perform the binding procedure. Ensure the receiver is powered on and within range. Check for interference.
- Mouvement du servo incorrect : Verify channel reversing and end point settings in the EdgeTX menu. Check servo connections.
- Dysfonctionnement du gyroscope : Ensure the gyro is correctly enabled and its phase is set according to the car's movement. Adjust gyro sensitivity as needed.
- Manette non réactive : Attempt a factory reset if persistent issues occur (refer to the full manual for factory reset procedures).
10. Garantie et assistance
Please refer to the instruction manual before use for detailed warranty information and support contacts. For technical assistance or warranty claims, contact RADIOMASTER customer support or your authorized dealer.