Does ModelRailPro work with the white z21 start?

Yes, both the white z21 start and the black Z21 use the same Z21 LAN protocol.

Do I still need the Roco Z21 app?

No. ModelRailPro replaces it for driving/turnouts/automation; you can keep the Roco app alongside.

Control your Roco / Fleischmann Z21 & z21 with ModelRailPro

The Roco/Fleischmann Z21 family — the black Z21 and the white z21 start — controls your layout over Wi-Fi/LAN. ModelRailPro speaks the Z21 LAN protocol directly, so you drive, switch turnouts and read occupancy without Roco’s own app.

Brand: Roco / Fleischmann Protocol: Z21 LAN (UDP) Works

Connection settings

UDP 21105 · default IP 192.168.0.111

How to connect your Z21

Connect your Z21 to the same network/router as your computer.
Start ModelRailPro — your browser opens automatically.
Go to Manage → Connection, pick "Z21" and enter the IP address.
Save. Pick a loco and drive — also from your phone on the same Wi-Fi.

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Good to know

Connect the Z21’s LAN port to your router and keep your phone on the same Wi-Fi.
The default Z21 IP is 192.168.0.111 — enter it under Manage → Connection.

Official site ↗

Frequently asked questions

Does ModelRailPro work with the white z21 start?: Yes, both the white z21 start and the black Z21 use the same Z21 LAN protocol.
Do I still need the Roco Z21 app?: No. ModelRailPro replaces it for driving/turnouts/automation; you can keep the Roco app alongside.

Other command stations

Control your Roco / Fleischmann Z21 & z21 with ModelRailPro

Connection settings

How to connect your Z21

Good to know

Frequently asked questions

Other command stations

DCC-EX

DR5000

Märklin CS2/CS3

ECoS

Twin Center

Lenz (XpressNet)

Uhlenbrock (LocoNet)