Control Method 1
Manufacturer App
A purpose-built app can provide a locomotive library, function icons, an interlocking panel and, in some cases, driver’s cab views. The best-known example is the Z21 App for Android and iOS devices.
Control locomotives, turnouts and routes from a mobile device
Digital Command Stations with Smartphone Control | Guide
Control your model railway by app, web browser or local Wi-Fi. This guide explains the differences between the Z21, YaMoRC, DAISY II WLAN, Intellibox, tams mc² and other digital systems for gauges Z, N, TT, H0, 0, 1 and G.
Your smartphone becomes a mobile throttle
How Does a Digital Command Station with Smartphone Control Work?
The digital command station continues to generate all driving and switching commands. The smartphone merely replaces part of the user interface. Speed, direction, lighting, sound and other locomotive functions are selected on the display. Depending on the system, turnouts, signals, routes and track-diagram control panels can also be operated.
The smartphone and command station communicate through a local network. Some command stations have an integrated Wi-Fi access point. Others are connected to a router by network cable. An internet connection is usually not required during normal railway operation. It may, however, be needed to install an app, activate features, perform updates or download additional content.
Smartphone control is generally independent of the model railway gauge. The decisive factors remain the digital protocol supported by the locomotive decoders, the track voltage and the available output. DCC is widely used on two-rail and many large-scale layouts. Märklin vehicles often use mfx, mfx+ or Motorola. A suitable command station must at least be able to transmit the protocol used by the existing vehicles.
A smartphone does not have to replace a conventional handheld controller completely. Many model railway enthusiasts use a phone for the track diagram, turnouts and locomotive selection, while speed and direction are controlled with a physical rotary knob. Good systems therefore allow several control devices to be used simultaneously.
Three ways to control a model railway from a mobile device
Compare an App, Web Browser or Wi-Fi Handheld Controller
Control Method 2
Browser-Based Interface
The smartphone opens the user interface through a local network address. A separate app is not required, so operation remains largely independent of the device’s operating system.
Control Method 3
Open Network Protocol
Command stations that support Z21, WiThrottle or LocoNet-over-TCP can connect to various apps, Wi-Fi handheld controllers and computer programs.
Three questions narrow the choice considerably
Which Smartphone-Controlled Command Station Suits Your Layout?
A direct overview of important network-enabled command stations
Digital Command Stations with Mobile Control Compared
| System | Mobile Control | Protocols | Network | Particularly Suitable For |
|---|---|---|---|---|
| Roco Z21 | Z21 App, WLANMAUS and additional controllers | DCC and Motorola | LAN, Wi-Fi router and several system buses | App control, interlocking and automation |
| YaMoRC YD7010 | Z21-compatible apps, WiThrottle and handheld controllers | DCC with RailCom cut-out | Wi-Fi access point, LAN and USB | Open DCC layouts and computer control |
| DAISY II WLAN | Smartphone, tablet and Wi-Fi handheld controller | DCC | Integrated access point or home network | Compact layouts and LocoNet expansion |
| Intellibox 3 | Smartphone, tablet and several mobile devices | DCC, mfx, Motorola and Selectrix | Wi-Fi, LAN, USB and LocoNet | Multiprotocol and large layouts |
| tams mc² | Browser on a smartphone, tablet or computer | DCC, Motorola, m3 and RailCom | LAN through a router or direct connection | App-independent and modular layouts |
| Märklin CS3 | Touchscreen, network and mobile additions | mfx, mfx+, Motorola and DCC | LAN, CAN and Wi-Fi through the network | Märklin H0 and Gauge 1 |
| Roco Z21 XL | Z21 App and Wi-Fi control devices | DCC | Wi-Fi router and Z-CAN | Gauges 0, 1, II and G |
Important: Wi-Fi does not automatically mean that
every app will work. The command station, app and network protocol
must be compatible with one another. Also check whether a router,
power supply, activation code or additional access point is required.
Mobile control for small and large scales
Choose Smartphone Control by Gauge
Gauges Z, N, Nm and TT
Small vehicles generally require little current. A suitable track voltage, sensitive speed control and reliable short-circuit protection are particularly important.
Suitable Systems
Z21, YaMoRC YD7010, DAISY II WLAN and tams mc².
Practical Advice
Set the track voltage according to the specifications of the vehicle and decoder manufacturers.
H0, H0e and H0m
These gauges offer the largest choice. DCC systems can be combined across manufacturers. Märklin H0 layouts must additionally take mfx and Motorola into account.
Suitable Systems
Z21, Intellibox 3, tams mc², DAISY II WLAN and Central Station 3.
Practical Advice
Combine a smartphone for the track diagram and locomotive selection with a handheld controller for shunting.
Gauge 0, Gauge 1 and Gauge G
Large vehicles, multiple motors, smoke and sound increase current demand. Mobile control is particularly convenient on extensive layouts.
Suitable Systems
Z21 XL, ZIMO MX10, PIKO G SmartControl and Massoth DiMAX.
Practical Advice
Plan the power supply, cable cross-sections and booster districts separately from the choice of app.
From unpacking to the first run
Connect a Smartphone and Digital Command Station Safely
Step 1
Connect the Command Station
Connect the track, programming track and specified power supply according to the instructions.
Step 2
Choose the Network
Configure either the command station’s own access point or a connection to the existing router.
Step 3
Connect the Mobile Device
Connect the smartphone to the correct Wi-Fi network and permit access to devices on the local network.
Step 4
Open the App or Browser
Launch the manufacturer’s app or open the command station’s local address in a web browser.
Step 5
Create the Locomotive
Enter the address, protocol, function icons, image and preferred number of speed steps.
Step 6
Test the Emergency Stop
Before operating the layout, check how the track power and all moving trains can be stopped immediately.
Command stations, Wi-Fi packages and mobile control devices
Products for Model Railway Control by Smartphone and Wi-Fi
The selection includes command stations that can be controlled directly by smartphone, as well as supplementary Wi-Fi handheld controllers and large-scale systems. For individual devices, check the required components on the respective product page.
Z, N, TT, H0e, H0m and H0 Two-Rail
Network-enabled DCC systems for app control, browser operation, feedback and subsequent computer control.
Direct App Control
Roco 10820 Z21
Network command station for the Z21 App, WLANMAUS, feedback modules and computer control.
View Product →
Complete Network Set
Roco 10834 Z21 Professional Digital Set
Z21, WLANMAUS, router and power supply as a coordinated complete system.
View Product →
z21 Start Upgrade
Roco 10814 Wi-Fi Package
Router and activation for smartphone control of an existing z21 start.
View Product →
Open DCC Network
YaMoRC YD7010
Wi-Fi access point, LAN, USB and several network protocols that can be used simultaneously.
View Product →
Compact Wi-Fi Command Station
Uhlenbrock 65260 DAISY II WLAN
DCC command station with its own Wi-Fi network, web server and LocoNet connection.
View Product →
Smartphone and Handheld Controller
Uhlenbrock 64360 DAISY II Set
Wi-Fi command station and physical throttle for flexible parallel control.
View Product →
Wi-Fi and Multiprotocol
Uhlenbrock 65300 Intellibox 3
Two throttles, touchscreen, Wi-Fi, LAN and extensive LocoNet expansion options.
View Product →
No Dedicated App
tams mc² Master Control 2
Browser-based control with versatile bus connections and adjustable output.
View Product →
Smartphone-Style Throttle
ESU 50311 CabControl
DCC command station with touchscreen handheld controller and ergonomic rotary knob.
View Product →
Mobile Touch Control
PIKO 55821 SmartControl WLAN
Wi-Fi system with a physical rotary controller for home DCC layouts.
View Product →H0 Centre-Conductor and Additional Mobile Control Positions
Multiprotocol command stations and Wi-Fi controllers for Märklin layouts, several operators and convenient shunting.
Märklin System Command Station
Märklin 60216 CS3 Plus
Touchscreen, network, feedback and extensive Märklin system integration.
View Product →
Graphical Control Panel
Märklin 60226 CS3
Central control of vehicles, routes and electromagnetic accessories.
View Product →
Wireless Märklin Throttle
Märklin 60667 Mobile Station WLAN
Physical throttle for mobile operation of compatible Märklin systems.
View Product →
Android Wireless Throttle
ESU 50116 Mobile Control II
Touchscreen and motorised rotary knob for supported network-enabled command stations.
View Product →
Set with Access Point
ESU 50115 Mobile Control Pro
Mobile control device for large layouts and several command station systems.
View Product →Gauge 0, Gauge 1 and Gauge G
High-output DCC systems and wireless controllers for large-scale layouts and garden railways.
App for Large Gauges
Roco 10870 Z21 XL
Z21 App control and six amps of output for gauges 0, 1, II and G.
View Product →
Garden Railway Wi-Fi System
PIKO 35055 G SmartControl WLAN
Wireless DCC complete set with five amps of output for Gauge G.
View Product →
High-Performance Command Station
ZIMO MX10
Two separate track outputs and extensive network and bus connections.
View Product →
High Power Reserve
Massoth 8136501 DiMAX 1210Z
Large-scale command station with adjustable voltage and current limiting.
View Product →
Mobile Garden Railway Throttle
Massoth DiMAX Navigator
Wireless controller for free movement along an extensive garden railway.
View Product →
Mobile Large-Scale Throttle
PIKO 35037 Navigator
Handheld controller for wired and wireless large-scale railway operation.
View Product →
Expand your digital layout sensibly
Suitable Manufacturers, Guides and Product Categories
Answers about mobile model railway control
Frequently Asked Questions about Digital Command Stations with Smartphone Control
Can I control my model railway without an internet connection?
Yes. The actual control process normally takes place within the local network. Internet access is often only required for downloading the app, installing updates, activating features or obtaining additional content.
Is a tablet better than a smartphone?
A tablet provides more space for a track diagram and routes. A smartphone is lighter and easier to carry while walking around the layout. Many users combine both devices.
Can I use several smartphones at the same time?
Many command stations permit several control devices to be used in parallel. The permitted number and available functions depend on the command station, app and network protocol.
What happens if the Wi-Fi connection fails?
The command station will normally remain switched on but will no longer receive new commands from the smartphone. A physical stop button or an additional handheld controller therefore improves operating safety.
Can an existing z21 start be controlled by smartphone?
A z21 start can be upgraded for use with the Z21 App by adding the appropriate Wi-Fi package and the required activation.
Which app works with YaMoRC or DAISY II WLAN?
These command stations support various network protocols. Suitable apps and handheld controllers include those that support Z21, WiThrottle or LocoNet-over-TCP. The manufacturer’s current compatibility list should always be consulted.
Can I operate turnouts and signals by smartphone?
Yes, provided that suitable accessory decoders have been installed and configured in the app or control interface. For a track diagram, turnouts and signals are assigned to their corresponding positions.
Can the app control a staging yard automatically?
Some apps can operate simple routes. A fully monitored staging yard additionally requires feedback modules, separate detection sections and, in many cases, model railway control software.
Is smartphone control suitable for a garden railway?
Yes. Mobile control is particularly convenient on extensive layouts. However, the command station must provide sufficient output, while Wi-Fi coverage, cable cross-sections and weather protection must be planned separately.
Content status: 16 July 2026.
Before setting up the system, consult the current instructions for the
digital command station, router, app, power supply, boosters and
decoders. App functions and supported operating systems may change
through updates.
More Basics on Digital Technology, Planning and Layout Construction
The main model railway guide covers gauges, digital decoders, wiring, track planning, feedback, scenery and maintenance.