Use this script on your pi-star hotspot to automatically change rooms. Just make a copy for each room you want to go into.

chg2americalink.sh

#!/bin/bash
CONFIG_FILE="/etc/ysfgateway"
TARGET_KEY="Startup"
REPLACEMENT_VALUE="FCS00390"

# Turn off read-only
sudo mount -o remount,rw / ; sudo mount -o remount,rw /boot

# Edit /etc/ysfgateway
sudo sed -i "s/\($TARGET_KEY *= *\).*/\1$REPLACEMENT_VALUE/" $CONFIG_FILE

# Restart the service
sudo service ysfgateway restart

# Turn on read-only
sudo mount -o remount,ro / ; sudo mount -o remount,ro /boot