RadioMaster MT12 User manual

MT12
Instrucon manual
Version：1.0
WWW.RADIOMASTERRC.COM
This manual is adapted from the EdgeTX online manual, which is provided and maintained by the EdgeTX team under
the Creave Commons Aribuon-ShareAlike 4.0 Internaonal (CC BY-SA 4.0) license. Full credit is given to the EdgeTX
team and contributors. More details can be found here: EdgeTX Online manual

Contents
1. Overview .......................................................................................................................................................................4
1.1. Introducon ...........................................................................................................................................................4
1.2. Safety informaon..................................................................................................................................................4
1.3. Radio overview.......................................................................................................................................................5
1.4. Baery and charging informaon..........................................................................................................................6
1.5. Manual and rmware download............................................................................................................................6
1.6. Specicaons .........................................................................................................................................................6
1.7. Warranty and repair...............................................................................................................................................7
1.8. Disclaimer & Legal status and copyright................................................................................................................7
1.9. Quick Start How-to videos .....................................................................................................................................8
2. User Interface................................................................................................................................................................8
2.1. Buon layout..........................................................................................................................................................8
2.2. Main View ..............................................................................................................................................................9
2.3 Reset......................................................................................................................................................................10
2.4. Stascs ...............................................................................................................................................................10
2.5. Custom RGB LED Setup ........................................................................................................................................12
2.6. Switch and Joysck Expansion Modules ..............................................................................................................13
3. Model Sengs ............................................................................................................................................................14
3.1. Model Select ........................................................................................................................................................14
3.2. Setup ....................................................................................................................................................................14
3.2. Drive Modes.........................................................................................................................................................21
3.3. Seng Fail Safe ....................................................................................................................................................24
3.4. Reversing a Servo.................................................................................................................................................25
3.5. Seng EXPO.........................................................................................................................................................25
3.6. Seng Dual Rate..................................................................................................................................................25
3.7. Seng End points ................................................................................................................................................26
Inputs, Mixes & Outputs .................................................................................................................................................27
3.5. Inputs ...................................................................................................................................................................27
3.6. Input conguraon page......................................................................................................................................28
3.7. Mixes....................................................................................................................................................................30
3.8. Outputs ................................................................................................................................................................31
4. Curves..........................................................................................................................................................................32
5.1 Seng curves........................................................................................................................................................32
5. Logical Switches ..........................................................................................................................................................33
6.1. Using Logical Switches..........................................................................................................................................33
6. Special Funcons.........................................................................................................................................................34
7.1. Conguring Special Funcons..............................................................................................................................34
7. Telemetry ....................................................................................................................................................................37

7.1. Sensors.................................................................................................................................................................37
8.2. Sensor Conguraon............................................................................................................................................38
8.3. Common Telemetry Sensors ................................................................................................................................40
8. Display.........................................................................................................................................................................41
8.1. Display screen conguraon................................................................................................................................41
9. Radio Sengs..............................................................................................................................................................43
10.1. Tools ...................................................................................................................................................................43
10.2. Radio Setup........................................................................................................................................................43
10.3. Global Funcons ................................................................................................................................................45
10.4. Trainer ................................................................................................................................................................45
10.5. Hardware............................................................................................................................................................46
10.6. Version ...............................................................................................................................................................48
10. Contributors and Further informaon......................................................................................................................48
11.1 Special thanks......................................................................................................................................................49
11.2 Links and resources.............................................................................................................................................49

1. Overview
1.1. Introducon
Thank you for purchasing the RadioMaster MT12 radio system. Advanced and highly-versale, MT12 is adaptable for
drivers of any skill level. To ensure safe and reliable operaons, please read this manual carefully prior to use.
As the soware and hardware are constantly improved, the informaon contained in this manual is subject to change
without prior noce. Please visit our website for up-to-date informaon and radio rmware.
MT12 is an open-sourced, ergonomic radio with powerful mul-protocol capability. Able to bind to most
contemporary protocols on the market, this is one radio to rule them all! MT12 runs EdgeTX, an open-sourced
operang system; for more informaon, please visit the EdgeTX link below.
-The RadioMaster team
1.2. Safety informaon
Radio-controlled models commonly contain sharp components like gears, rotang at high RPMs; when operang or
maintaining the model, always use common sense and proceed with cauon.
Always disconnect power to the model during the assembly or maintenance process.
Never operate the MT12 radio system in the following condions:
• In severe weather or strong windy condions, such as rain, hail, snow, storms or electromagnec environments.
• In limited visibility
• In the proximity of other people, property, high-voltage power lines, public roads, vehicles or animals
• When feeling unwell, or under the inuence of drugs or alcohol.
• If the MT12 radio system/model is damaged or showing signs of interference.
• In areas with high 2.4GHz interference or where 2.4GHz radios are prohibited.
• When the Transmier or receiver baery is low.
• In areas where local regulaons prohibit the use of R/C models.
WARNING!
MT12 is pre-installed with the most stable rmware at the factory at me of release. please only aempt to update
the rmware if you are condent in the process. Incorrect rmware updates may cause the remote control to
become inoperable. Damage as a result of improper rmware update may not be covered under warranty.

1.3. Radio overview

1.4. Baery and charging informaon
MT12 is powered by 2x 3.7V 18350 Lithium Ion cells and is charged using the built-in USB-C port. The charging
circuitry is designed for charging 2x 3.7V Lithium Ion/Poly or 1x 7.4V Lipo baery pack only; the nominal voltage is
3.7V and the maximum charging voltage is 4.2V.
Never charge 3.6V LiFe and 3.6V 18350 Lithium Ion packs with the onboard charger. Charging or using the wrong
baery chemistry/polarity may cause permanent damage to the PCB and in certain situaons cause res.
Check the voltage and condion of the baery regularly and never charge the device unaended. Only charge in safe
areas away from combusble materials. Refrain from charging the radio unit if it was exposed to water or was
damaged in any way. RadioMaster does not assume any responsibility for any adverse consequences caused by the
use or misuse of this product.
1.5. Manual and rmware download
MT12 is pre-installed with factory approved EdgeTX rmware and is also capable of operang OpenTX. To download
the latest manual or stock factory rmware, please visit the RadioMaster website: hps://www.radiomasterrc.com
When updang your radios rmware we would encourage you to use EdgeTX Buddy.
EdgeTX
hp://edgetx.org/ (Informaon about EdgeTX)
hps://buddy.edgetx.org/ (easy to use tool for FW updates)
hps://edgetx.gitbook.io/edgetx-user-manual/ (EdgeTX Online manual)
ExpressLRS
hps://www.expresslrs.org/quick-start/geng-started/ (ExpressLRS Online guide)
Mul-Module
hps://www.mul-module.org/ (Online resources)
1.6. Specicaons
Physical dimensions：177.8*118.4*207.8mm
Weight：480 grams
Operang frequency：2.400GHz-2.480GHz
Internal RF Opons：4-in-1 mul-protocol / ELRS 2.4GHz
Supported protocols ：Module dependent
Operaonal current: 160mA for 4 in 1. 400mA for ELRS 250mW .
Operaonal voltage：6.6-8.4V DC
Operang system：EdgeTX
Control channels：Maximum 16 (Rx dependent)
Display ：128*64 Monochrome LCD
Baery ：2 x 18650 cells or a 2s 7.4v 5000mah baery pack (Baeries not included)
Charging ：Built in USB-C Charging
Firmware Upgrade method：Via USB or SD card
Gimbal：Hall-eect
Module bay ：Nano size (RadioMaster Ranger Nano Module / RadioMaster RM 4in1 module /
TBS Crossre Nano module)

1.7. Warranty and repair
Should any issues arise with your radio system's hardware, please keep the proof of purchase and contact the retailer
where you made the MT12 purchase. . You may also visit our warranty support page
hps://www.radiomasterrc.com/contact
The limited warranty covers defects in workmanship for one year from the date of purchase
1.8. Disclaimer & Legal status and copyright
EdgeTX is open source rmware. No warranty or implied warranty is given for the quality and reliability of this
rmware. If not handled properly, the RC model can cause serious injury or even death. If you decide to use EdgeTX
rmware, you are solely responsible for your model. EdgeTX and RadioMaster are not liable for any injury or damage
caused by using EdgeTX rmware or RadioMaster hardware. Use with cauon.
This project is free soware: you can redistribute and / or modify it in accordance
with the GNU General Public License Agreement, V3 version agreement, or (oponally)
an updated version agreement issued by the Internaonal Free Soware Associaon. You should receive a copy of
the GNU General Public License Agreement for the EdgeTX project. If not, see www.gnu.org/licenses. EdgeTXis open
sourced rmware for RC radio controllers. The rmware is highly congurable and has more features than tradional
radios. Daily feedback from thousands of users ensures connuous rmware updates as well as stability andquality.
The release of EdgeTX rmware hopes that it will benet the public, but it has no warranty; it does not include
implied commercial licenses or applicability for a special purpose. For more details, see the GNU General Public
License Agreement. EdgeTXsource les and more can be found at hps://github.com/opentx/opentx and
hps://github.com/edgetx/edgetx.

1.9. How to BIND videos
How to bind an R85C Receiver with a 4in1 MT12
How to bind an ER3C-I receiver with ExpressLRS MT12
2. User Interface
2.1. Buon layout
•[SYS] - System Button - Short
press [SYS] button from the
main screen to go to the tools
page of the Radio Settings
menu.
•[MDL] - Model Button - Short
press [MDL] button from the
main screen to go to the
Model Select of the Models
menu
•[RTN] - Return / Back - Short
press [RTN] button to return
to the previous page,
previous menu or cancel
action
•[PAGE>] / [PAGE<] - Page
next & page previous - Used
to navigate between different
screens, tabs, or options
settings, depending on the screen.
•[TELE] - Telemetry - Press the [TELE] button to go to the configured telemetry screens. More
information about the telemetry screens is found in the Display section.
•[Roller] or [Dial] - Next & previous value The roller is used to navigate through menu options.
•[Enter] - Accept - Used to select option, function or accept value - Push [Roller] button to select or
enter.

2.2. Main View
Screen 1 - This view displays the model name, trim positions (if trims are
enabled), clock, transmitter battery voltage, Drive mode, receiver signal
strength, and Timers 1 and 2 (if enabled).
Screen 2 - This view displays the model name, trim positions (if trims are
enabled), clock, transmitter battery voltage, Drive mode, receiver signal
strength, and Timer 1 (if enabled). It also has a graphical representation
of the stick, pot, and switch positions.
Screen 3 - This view displays the model name, trim positions (if trims are
enabled), clock, transmitter battery voltage, Drive mode, receiver signal
strength, and Timer 1 (if enabled). It also shows the numerical values of
the output channels, 8 channels per page. Use the [Roller] to scroll thru
the additional pages.
Screen 4 - This view displays the model name, trim positions (if trims are
enabled), clock, transmitter battery voltage, Drive mode, receiver signal
strength, and Timer 1 (if enabled). It also shows the values of output
channels as a bar graph, 8 channels per page. Use the [Roller] to scroll
thru the additional pages.
Screen 5 - This view shows either the channel monitor or mixer monitor,
8 channels per page. Use the roller or dial to scroll thru the additional
pages. Push the [Roller] button to switch between the channel monitor
and mixer monitor.
Long pressing the [Roller] button from the main view screen will show a
pop-up menu with the options below:
•View Notes - Displays the congured model checklist. This opon is only visible if a valid model checklist le
is in the Models folder.
•Reset - See Reset page.
•Stascs - See Stascs page.
•About - Displays the EdgeTX rmware version being used by the radio.

2.3 Reset
Selecng Reset from the pop-up menu will give you the following opons:
Reset ight - When selected, this opon:
•Resets all mers congured with a persistence seng of Flight to zero.
•Resets all discovered telemetry sensor values.
•Resets all logical switch states
•Triggers the same checks as loading the model - i.e. throle posion, switch state, is failsafe set check,
display pre-ight checklist if congured, stuck keys test, etc.
Reset mer 1 / 2 / 3 - Resets only the selected mer to zero regardless of the congured persistence seng.
Reset telemetry - This opon resets all discovered telemetry sensor values
2.4. Stascs
The Stascs screen presents you with stascs regarding radio usage. All data is reset once the radio is powered o.
The following informaon is provided:
•SES - The amount of me that the radio has been turned on.
•THR - The amount of me that the throle has was above the 0% sck posion.
•TH% - The amount of me that the throle has was above the 50% sck posion.
•TM1/2/3 - The current values of Timer 1, Timer 2, and Timer 3.
•Throle Graph - Shows the throle percentage over me.
Long pressing the [Roller] or [Dial] buon will reset the Stascs and Debug screens.
Pressing [PAGE>] will take you to the Debug screens.
Debug screen 1