KATO CPDLC
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KATO CPDLC Platform

A lightweight, modern, Hoppie-compatible CPDLC/ACARS data link server for flight simulation, dispatch, and ATC training.

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Highlights

⚡ Protocol Compatible

Interoperates with Hoppie-style clients (TELEX/CPDLC/INFOREQ/PING).

🗄️ File Transfer

PUTFILE/DATAREQ pipelines for route packs, OFP, weather briefs.

🚀 Fast Fast Fast

Node.js backend + CPP Client

Use Cases

✈️ Flight Simulation

End-to-end CPDLC with virtual pilots and controllers.

🎓 ATC Training

Clearances, position reports, requests — practice safely.

🧩 Integrations

Dispatch tooling, auto weather replies (METAR/TAF), more.

Status
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Online Users
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Recent Messages
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Last Message (UTC)
Auto-refresh every 10s
Send / Query
Tip: Weather quick query — set Type = inforeq and Packet = metar ZBAA or taf ZBAA

        

      


      
      

        
Online & Log

        

          

            

              
Online Users

              
    
            
    
            
    
              
    Filters
    
              
    
                
                
              
    
              
    
                
                
              
    
            
    
          
    

          
    
            
    Time (UTC)
    From
    To
    Type
    Message
    
          
    
          
    
          
    Auto-refresh every 10s
    
        
    
      
    
    
    
  
    

  
  
    
    
    
      
    Developer Docs
    
      
    
        
    Base URL
    
        
    http://47.79.40.254
    

        
    Core Endpoints
    
        
    Message / Control
    
          GET http://47.79.40.254/kato/system/connect.html?logon=LOGON&from=CALLSIGN[&to=DEST]&type=TYPE&packet=PAYLOAD
        
    
        
    Online (HTML)
    
          GET http://47.79.40.254/kato/system/online.html
        
    
        
    Log (JSON)
    
          GET http://47.79.40.254/kato/system/log.json
        
    

        
    Common Operations
    
        
    Logon
    
          GET http://47.79.40.254/kato/system/connect.html?logon=KATOSERVER&from=CES9000&type=logon&packet=CES9000
        
    
        
    Poll (keep-alive)
    
          GET http://47.79.40.254/kato/system/connect.html?logon=KATOSERVER&from=CES9000&type=poll
        
    
        
    Send CPDLC
    
          GET http://47.79.40.254/kato/system/connect.html?logon=KATOSERVER&from=CES9000&type=cpdlc&packet=READY
        
    
        
    Weather (INFOREQ)
    
          GET http://47.79.40.254/kato/system/connect.html?logon=KATOSERVER&from=CLIENT&type=inforeq&packet=metar%20ZBAA
        
    
        
    File Upload (PUTFILE)
    
          GET http://47.79.40.254/kato/system/connect.html?logon=KATOSERVER&from=CES9000&to=ROUTE.txt&type=putfile&packet=DCT%20ABC%20DCT%20XYZ
        
    
        
    File Request (DATAREQ)
    
          GET http://47.79.40.254/kato/system/connect.html?logon=KATOSERVER&from=CES9000&type=datareq&packet=ROUTE.txt
        
    

        
    Notes
    
        
    
          Times shown in the UI are UTC. If packet is returned as a Buffer (e.g., {type:'Buffer',data:[...]}),
          the UI will decode it automatically.