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ConnectionSettings.md

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Connection Settings

Connection settings can be established using the API or parsing a connection string with the next options:

  • HostName MQTT host name
  • IdScope DPS IdScope
  • DeviceId Device Identity
  • SharedAccessKey Device Shared Access Key
  • SasMinutes SasToken expire time in minutes, default to 60.
  • X509Key pathtopfx>|<pfxpassword see details in X509Certificates
  • ModelId DTDL Model ID in DTMI format to create PnP Devices
  • ModuleId IoTHub Device Module Identity
  • UserName Username to be used to authenticate with MQTT Brokers
  • Password Username to be used to authenticate with MQTT Brokers
  • ClientId Client ID used when connecting to MQTT Brokers (IoT Hub requires used deviceId as clientId). Use {machineName} to override
  • KeepAliveInSeconds Seconds to send keep alive packets, default to 60
  • CleanSession Establish the connection with a clean session, default to true
  • TcpPort Sets the TCP port for the MQTT connection, defaults to 8883
  • UseTls Enable/Disable Server TLS connection, defaults to true
  • CaFile Path to the CA certificate required to stablish the TLS session

Sample Connection Strings

Azure IoT Hub

HostName=<hubName>.azure-devices.net;DeviceId=<deviceId>;SharedAccessKey=<deviceSasKey>

Azure Device Provisioning Service/Azure IoT Central

IdScope=<dps-id-scope>;DeviceId=<deviceId>;SharedAccessKey=<deviceSasKey>

Azure IoT Plug and Play

HostName=<hubName>.azure-devices.net;DeviceId=<deviceId>;SharedAccessKey=<deviceSasKey>;ModelId=<dtmi:yourmodel;1>

IdScope=<dps-id-scope>;DeviceId=<deviceId>;SharedAccessKey=<deviceSasKey>;ModelId=<dtmi:yourmodel;1>

Using Certificates

HostName=<hubName>.azure-devices.net;X509Key=<path-to-pfx>|<pfx-password>

IdScope=<dps-id-scope>;X509Key=<path-to-pfx>|<pfx-password>

Advanced Connection Options

HostName=<hubName>.azure-devices.net;DeviceId=<deviceId>;SharedAccessKey=<deviceSasKey>;ModelId=<dtmi:yourmodel;1>;SasMinutes=60;KeepAliveInSeconds=30

IdScope=<dps-id-scope>;DeviceId=<deviceId>;SharedAccessKey=<deviceSasKey>;ModelId=<dtmi:yourmodel;1>;SasMinutes=60;KeepAliveInSeconds=30

Connecting to a MQTT Broker

HostName=<broker-hostname>;UserName=<user-name>;Password=<password>;CliendId=<client-id>

HostName=<broker-hostname>;X509Key=<path-to-pfx>|<pfx-password>;ClientId=<client-id>

Note: All samples use the connection settings in the ConnectionString configuration, available in the appSettings.json file, or as the environment variable ConnectionStrings__cs, or command line argument /ConnnectionStrings:cs