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MQTT Device Service Setup

This folder contains the MQTT device profiles for the simulated and real sensordata that will published to the common MQTT Broker.

  • device-pos (POS events)

    • basketopen (simulated)
    • positem (simulated)
    • paymentstart (simulated)
    • paymentsuccess (simulated)
    • basketclose (simulated)

    Refer to checkout-events.json for sample of scale-pos JSON objects

  • scale-device (Weight scale events)

    • scaleitem (simulated)

    Refer to checkout-events.json for sample of scale-device JSON objects

  • rfid-device (RFID events)

    • heartbeat (not simulated)
    • alert (not simulated)
    • events (simulated)

    Refer to rfid-events.json for sample of rfid-device JSON objects

  • roi-device (CV Region of Interest events)

    • roi-enter (real data)
    • roi-exit (real data)
    • roi-count (real data)

    Refer to roi-events.json for sample of roi-device JSON objects

Configuring MQTT Device Service

See https://www.edgexfoundry.org/blog/2019/09/26/edgex-open-hackathon-snaps/ for details on installing edgex-device-mqtt

Once edgex-device-mqtt is installed copy the configuration and device profiles from this folder to /var/snap/edgex-device-mqtt/current/config/device-mqtt/res

Then start the edgex-device-mqtt

sudo snap start --enable edgex-device-mqtt

edgex-device-mqttpushes its configuration into the Registry, aka Consul the first time it is run. On subsequent runs it pulls the configuration from the Registry. Use Consul UI @localhost:8500 from your browser to make simple configuration changes, like changing Writeable/LogLevel.

Add a new MQTT device profile

  • Copy your new device profile to /var/snap/edgex-device-mqtt/current/config/device-mqtt/res
  • Add the Device to the DeviceList section in the configuration.toml located in /var/snap/edgex-device-mqtt/current/config/device-mqtt/res
  • Remove the configuration from Consul by deleting edgex/devices/1.0/edgex-device-mqtt via
  • run sudo snap restart edgex-device-mqtt
    • New device profile will be added and updated configuration.toml will be push into Consul UI @localhost:8500

Modify a MQTT Device Profile

If you need to modify a device profile to add a new device resource, change a name, etc.

  • Make the change to the device profile in /var/snap/edgex-device-mqtt/current/config/device-mqtt/res

  • Run the following curl commands to clear out the old device profile

    curl -X DELETE http://localhost:48081/api/v1/deviceservice/name/edgex-device-mqtt
curl -X DELETE http://localhost:48081/api/v1/deviceprofile/name/device-dummy

  • Restart the Device MQTT

    sudo snap restart edgex-device-mqtt

    This will push your device profile changes into the DB.