Applies to Models: Select Hanwha Cameras

Summary

This article details installing and using Mosquitto MQTT with Hanwha cameras that support this function. MQTT is a simple messaging protocol designed for constrained devices with low bandwidth. MQTT is the perfect solution for exchanging data between multiple IoT devices. MQTT communications work as a publish and subscribe system. Devices publish messages on a specific topic, and all devices subscribed to that topic receive the message. Since Mosquitto is free software, this article should be treated as a proof of concept. We do not know how much traffic a Mosquitto server can handle.

Configuring MQTT

1. Download and install Mosquitto onto your PC.
   
   
2. Navigate to C:\Program Files\mosquitto and edit the mosquitto.conf file. Add the following to the bottom of the mosquitto.conf file:
   
   
   • • listener 1883 0.0.0.0 # TCP
     • allow_anonymous true
     • log_timestamp_format %Y-%m-%dT%H:%M:%S
       
       
       
       
3. Open the Command Prompt and navigate to the mosquitto directory.  Enter the following command for logging to commence:
   
   
   • C:\Program Files\mosquitto> mosquitto.exe -c mosquitto.conf -v
     
     
     
     
4. Login to your source camera.
   
   
5. Select Setup > Event > MQTT > Client Setup section.
   
   

   NOTE: Your camera does NOT support MQTT if it does not have an MQTT section.

6. Use the settings below in the MQTT > Client Setup screen.
   
   
   • MQTT:  Enable
   • Address:  This is the IP address of the pc running the Mosquitto application
   • Port:  This is the listener port from mosquitto.conf file
   • Username:  Your choice
   • Transport Protocol:  TCP
   • Custom Client ID:  Enable
   • Client ID:  Your choice
   • Keep Alive Interval:  30
   • Connect Timeout:  60
   • Auto Reconnect:  Enable
   • Clean Session:  Enable
   • Default Topic Prefix:  Your choice
     
     
     
     
7. Select MQTT > Publication/subscription and click Add on the Publication tab.
   
   
   
   
8. Enter a Name, Topic, and Payload message.
   
   
9. Select Event > Event Rule and click Add.
   
   
10. Select an Event Trigger, and select the Name you created in step 8 under the MQTT drop-down.
    
    
    
    
11. Click OK.
    
    
12. On the PC where Mosquitto is installed, test the subscription.   You must switch to the mosquitto directory to run the commands below.
    
    Enter: mosquitto_sub.exe –h <Mosquitto server IP> –p [port] –t [topic] –i mosq_sub –c -d
    
    Example:
    C:\Program Files\mosquitto>Mosquitto_sub.exe -h 10.1.4.88 -p 1883 -t testpublish -i mosq_sub -c -d
    
    
    
    Once MD is triggered, the camera publishes the topic you defined in step 8. You can see this in the mosquitto subscription test.
    
    Other MQTT-enabled cameras or IoT devices can subscribe to the publication rule we have configured.
    
    
13. Under the Event Trigger column, select the MQTT subscription, click on the Subscription drop-down, select your subscription, then click Apply.
    
    
14. The MQTT subscription will update the camera's Event Log if no Event Action is selected.