EdgeTX (MT12) Overview

This will be a brief overview on how to navigate your MT12 with a brief overview on the pages, switch functions, and a quick overview on what this radio can do for you.

The buttons on the face of the radio is as follows:

System & Model

Just think of these as 2 separate menus. The easiest way to explain it is...

System menu make changes to the actual radio itself (I.e. Volume control, brightness, firmware version, calibration, etc.)

While the Model menu has to do with controlling your R/C. (I.e. Expo, Throttle cap, trimming, etc.)

Although there might be some crossovers, this would be my best explanation

Channels

We can see two pots (knobs) labeled P1 and P2. The Steering (CH2), and 2 trim levers (protruding from the top of the steering)

There is another trim lever (left of steering) and a toggle switch (below the steering) Also, you can see the throttle lever and to the left of it, two momentary switches (top is SB) (Bottom is SC)

Lastly, there is another momentary switch (Labeled SD) at the bottom.

Also, (not pictured) are optional 2x "2" position switches and a joystick if you wish to add it to the bottom base of the transmitter. These are included in the packaging and ready to install.

Model Menu

First, we will visit the Model Menu's. Once you enter MDL (Model), you will see 12 separate pages (sections) as they are organized as so.

An easy way to reference is the page number will be shown on the top right of the screen (I.e., 1/12, indicating it is on the first page)

To navigate between each page, you will use the left or right page key. To make changes, you will use the scroll wheel to enter (press down on it like a button) and scroll to select your desired option.

Page 1/12: Model Selection

Think of these as "profiles" for your R/C. For example, if you have a buggy and need specific rates or throttle expo, you would make it here. However, if you have a crawler and need different settings, you can make a separate "profile" and store it in here.

The cool about EdgeTX (the software we are using) is that multiple R/C's can be "bound" to one profile. For example, if you have 3 buggy's that you are using as back ups, you can bind it to your buggy profile and they will retain all the same features. This comes in handy when you need your R/C's to perform exactly the same.

Page 2/12: Setup Page

Here, you can change your profile name (See previous picture, it states "MT12", you can change it here)

Again, once you land a page, you will navigate using the scroll wheel instead of the page buttons.

You can also adjust your timer (if you choose to use it) but most importantly, we can select which transmitter we can use in this menu.

There are 2 different transmitter options. Internal is the one installed inside your MT12 and External is an addon option.

For example, our version of the MT12 has ELRS built into it (Internal RF) and if we want to run another protocol like flysky or dsm, we can get an external multi-protocol module to attach to the radio. This feature allows us to turn on and off on the transmitter we want to use.

Note: Certain protocol allows for wireless buddy boxing so you will run both transmitters at the same time. (Internal & External RF)

If you have our version of the MT12 (ELRS), the Internal RF must be turned on to be able to function correctly. If this is on the "OFF" position, the transmitter will not bind to the receiver on your model.

The default protocol is CRSF for the MT12 ELRS version.

The external module port is located here. (Just pop off the cover)

Turn on "External RF" to use your attached transmitter

If you choose to use an external RF module, the plug in port is right above the screen. Also, it may be best to turn off the Internal RF to save battery power as you will not be using this.

Page 3/12: Drive Modes

This is a preset page where you can save your trim settings.

To be honest, I can only see this menu being useful for planes but this is the beauty of EdgeTX as it gives plenty of options to customize.

If you have an idea why a specific trim setting can be used with an R/C ground vehicle, please leave a comment below!

How Inputs, Mixes, and Outputs work together

Before we go further, it may be important to understand how the next 3 pages work together. Basically, it goes like this:

User moves a switch, throttle, steering, etc. --->

Input receives the information --->

Mixes will receive the information and make changes (if set by the user) --->

Outputs makes the final adjustments (if set by the user) --->

Sends information to the receiver

Page 4/12: Inputs

This is where all your channel assignments are located as default. This means, all your buttons, switches, pots, throttle, and steering are assigned so the radio knows these are active.

Personally, I would not suggest making your changes here as a mistake may remove the functions as stated above.

Instead, I highly recommend making changes in the Mixes menu which will proceed this page.

Page 5/12: Mixes

This page will allow you make changes like throttle cap (reducing throttle), weight (resolution), curves, and mixing channels to name the most common ones.

For example, if you want to set up a beginner mode (I.e. 60% max throttle, plus expo so the throttle doesn't "jump") you can do it here.

Also, you can clearly see the channel assignments (on the left) so you can match your plugs to your receiver.

We will be diving deeper on this section in our other blogs or videos on youtube.

Notice there is -100 and 100 to show the end point ranges on these settings

Page 6/12: Outputs

This is where you can adjust the end points, center point, and reverse (invert) inputs.

Basically, all R/C inputs uses end points. Just think of it as 0% to 100%. However, your steering and throttle is more like -100% to +100% with 0% set at the middle. If you go -100% on the throttle, it will go back or if its your steering, it will turn left.

The endpoints are shown as -100 and 100 to demonstrate the range it can go both ways.

Also, if your steering or throttle is reversed, you can reverse it in here.

Of course, we will dive deeper into this in our other blog or videos.

Page 7/12: Curves

Who doesn't like curves?

As we mentioned in Mixes, you can set your expo but it is more a quick interface that mirrors both sides. (Equally)

However, you can customize your expo or inputs here. For example, if you want your forward movement on your throttle to immediate jump forward but want your reverse gradually go slow then fast, you can adjust it here and assign it to your mixes.

Again, we will cover this in a future blog or video.

Page 8/12: Logical Switches

This is where EdgeTX really shines as you can fully customize any input you wish to do. Each function is assigned as (L0) proceeded by the number.

Here, we can see Radiomaster has already added L02, L03 and bound them together on L05.

Basically, it is saying to turn on a function when the throttle is -5 or +5. (Next section will explain why)

We can also see L01 has Stky (Sticky) selected and assigned to SB.

Physically, the SB is a momentary switch (must be pressed and held down to function) but using a logical switch (L0), we can make it into a toggle switch. (Press down and let go to ON, then press again to turn it OFF)

The physical switches (the ones where you can actually move and press) have labels on it and the SB switch is located where my thumb is (see picture).

Although the picture doesn't do justice, but you can see the pots (knobs) showing P1 and P2 as the SB is labeled as well.

Page 9/12: Special Functions

Just like how inputs affect mixes and mixes affect outputs, it can be the same with Logical Switches and Special Functions.

Here, we can see L01 (previous page, it was set on Stky) and it is commanded to play a track that says "start" and "stop". If you press the SB button, the radio will chirp this sound.

For the L02, L03, and L05, this controls the LED colors on the bottom sides of the radio. This is why they flash at full throttle (rainbw)

Basically, Special Functions can allow you to customize call outs or control extra features (like LED) to your choosing. Of course we will cover this more in detail in other blogs or videos.

Page 11/12: Telemetry

If your receiver allows for this, you can check if your telemetry options are active in this menu.

Also, you can set warnings. (if you want your radio to chirp to let you know if your radio link is low or your telemetry signal is low, you can set it here)

This is where you can also do a range test check your range to see if your hardware is working correctly.

Page 12/12: Display

This menu will allow you set which elements you want to show on your main screen. (The first screen you see after you start up your radio)

On the main screen, you can customize it to show what type of information is visible, it is like widgets on your phone.

Right now, it says screen 1 (yes, you can select which screen to show on your main screen) and RxBt (radio link strength) and TSB (this is your timer) are allowed to show on your main screen.

This is your main screen and on screen 1. However, we don't see the radio link quality as you will have to manually add it here.

System Menu

Page 1/7: Tools

If you go back to the main screen and press the SYS key, this will enter the System pages.

Tools are basically alternate menus that they system page (2/12 under MDL) cannot support.

You can see the ExpressLRS (ELRS) menu here to make your adjustments and if you are using an external TBS crossfire module, the menu is for that is here under TBS Agent.

Page 2/7: SD Card

All your sounds, models, firmware (if you choose to update it with the radio) are located here. It is all the files on the SD card inserted into your radio.

You can also add your own sound pack to make custom sounds if you want your switches or buttons to make a specific sound to your choosing.

Page 3/7: Radio Setup

As mentioned before, all your radio settings are under the System Menu. You can adjust the volume, date, time, when you want your low battery warning to sound here.

You can also adjust the screen brightness and the length of how long you need to push the power button to turn on and off your radio.

Page 4/7: Global Functions

The settings made here will affect ALL your model settings (remember page 2/12 in the MDL menu?)

When selecting different profiles for your models, it will not cross over. However, global functions will retain any changes so all your profiles will use these settings here.

Personally, I use one of the knobs to adjust the screen brightness to save a little bit more battery and this applies to any profile model I use.

Page 5/7: Trainer

This is when you are buddy boxing or using PWM for head tracking. (With the XplorerHD, you don't need this!)

You can select which radio is the master or slave and add channels (take over controls) under here if it is set up.

Page 6/7: Hardware

Here, we can see the actual switches attached to the radio. (Note, you can only see 2x Pots "knobs" as the MT12 only has 2)

Most likely, the only option that may be used is the "Calibration" if your steering, throttle or knobs are out of calibration.

Because Calibration is a very important, we'll go through it right now before moving forward.

You can access this CH monitor from the main screen. Once there, use the Page </> until you get to this monitor.

Here, we can see the throttle (CH1) and steering (CH2) are off by +4 and -5. Things to check before calibration:

1) Check if your trims are centered, sometimes we might bump them and not know

2) By looking at the channels monitor screen, check if the values are twitching. If so, this might be a sub trim and/or mechanically the part is wearing out

If both checks out, then let's start the calibration.

Here are the steps:

Press down on the scroll key to enter Calibration mode

Press enter (scroll key) again

Fig 1. Here, the only things to center are the knobs (labeled P1 and P2). You will feel a indent when they are centered. Do NOT touch the steering or throttle lever! Press enter again.

Fig 2. Move the steering ALL THE WAY at the ends, left and right. You can see the motion on the box to the right of the screen.

Fig 3. Move the throttle level ALL THE WAY forward and back. The box on the left of the screen will shown forward and back arrow.

Fig 4. Do the same with BOTH knobs (one at a time) Afterwards, press enter

You can leave the calibration menu after this and now your CH1 (Throttle), CH2 (Steering), CH5 (P1 Knob), and CH6 (P2 Knob) are centered and not offset.

Page 7/7: Version

On this page, the most important information is the current firmware information.

This might be important when you may need to update a component and they must be compatible.

There are 3 main devices that can be updated and all of them must be in compliance for the MT12 to work properly. They are:

• Radio Firmware (noted on this page)

• SD Card Content Version

• Transmitter Firmware (in this case, your ELRS internal RF module)

We will be consistently uploading blog posts and/or videos on our youtube channel. If you want something covered, please leave it in the comments below!

Ready to jump in? You can find it here: https://www.ironquad.com/product-page/radiomaster-mt12-elrs

We look forward to your next adventures and please share your moments with us by tagging us on YouTube or Instagram!