Here are some typical airport systems which you could integrate
Control Systems
Lifts, Escalators and Travelators
Baggage SCADA
Building Management System
Fire Alarm Management System
Tunnel Ventilation
Utilities
Energy Management Systems
Heating, Ventilation, and Air Conditioning
Lighting
Low/High Voltage
Emergency Power Generators
Pumping Installations
Pollution Control
Leak Detection
Security Systems
Closed Circuit Television
Access Control
Intruder Detection
Automatic Turnstiles
Anti-Backtrack Doors
Passenger Equipment
Flight Information Displays
Public Address/Voice Alarm
Passenger Help Points
Air-bridge monitoring
Fixed Electric Ground Power
Pre-conditioned Air