• WIOpi
  • PiOS

The Rasberry Zero has two USB connectors:

The USB connector can be used to connect a CommandStation with Serial port.
This will be available in Rocrail as device /dev/ttyUSB0.

Provide the Zero with a PiOS Lite SD-Card and activate ssh and WiFi.
How to setup a Raspberry Pi is found on many places in Internet, so it won't be part of this Wiki.
Some hints and tips can be found here: Headless CAM

Open an ssh session with the zero.

sudo apt install zip
mkdir Rocrail
cd Rocrail/
wget https://wiki.rocrail.net/rocrail-snapshot/Rocrail-ARMHF.zip
unzip Rocrail-ARMHF.zip

cd
mkdir RocrailZero
nano startrocrail.sh 

Content of startrocrail.sh:

#!/bin/sh
cd /home/pi/RocrailZero
/home/pi/Rocrail/bin/rocrail -l /home/pi/Rocrail/bin 
if [ $? -eq 70 ]
then
  sudo halt -p
fi

The last 4 lines will shut down the Zero properly in case of a normal end, but is of course optional.
A normal Server end is signalled by the return value of 70.
Booting the Zero 2 W is very fast, so the Rocrail server is available after 10…20 seconds.

chmod +x startrocrail.sh

crontab -e
@reboot /home/pi/startrocrail.sh

cd ~/Rocrail/
wget https://wiki.rocrail.net/rocrail-snapshot/Rocrail-ARMHF.zip
unzip Rocrail-ARMHF.zip

After a reboot the Rocrail server will be started automatically, and every Rocrail Client can connect to it by the Network name as assigned at the Zero setup.
Note: The default network name is Raspberry. (Rename it)

Every Command Station featuring a serial USB, LAN or WLAN connection can be connected.

Parallel a WIOpi can be active on the same Zero.
It will automatically connect to the Rocrail Server.