Microsoft Azure IoT Hub SDK for C# Long Term Support Release 2020-1-31

Microsoft.Azure.Devices.Client v1.22.0

• Added API to specify client side AMQP heartbeat interval.
• Centralize TLS version choice, prefer None where possible.

Microsoft.Azure.Devices v1.18.4

• Fix proxy handling on HTTP for requests with per-request timeout.
• Centralize TLS version choice, prefer None where possible.

Microsoft.Azure.Devices.Provisioning.Service v1.5.2

• Centralize TLS version choice, prefer None where possible.

Microsoft.Azure.Devices.Provisioning.Transport.Http v1.1.7

• Centralize TLS version choice, prefer None where possible.

Microsoft.Azure.Devices.Provisioning.Transport.Mqtt v1.1.9

• Centralize TLS version choice, prefer None where possible.

Microsoft.Azure.Devices.Shared v1.17.0

• Created a new resource TlsVersions to specify the TLS information for the project.
• Update Twin object to return the parsed DateTime value.

Microsoft.Azure.Devices.Provisioning.Security.Tpm v1.1.7

• Update reference to Microsoft.Azure.Devices.Shared nuget.

Microsoft.Azure.Devices.Provisioning.Transport.Amqp v1.1.10

• Update reference to Microsoft.Azure.Devices.Shared nuget.

Microsoft.Azure.Devices.Provisioning.Client v1.4.1

• Update reference to Microsoft.Azure.Devices.Shared nuget.

Azure IoT C# SDK Long Term Support Release 2020-1-24

Microsoft.Azure.Devices.Client v1.21.4

• Upgraded Newtonsoft dependency to 12.0.3
• Fixed twin parsing to use DateTimeOffset instead of DateTime (#1122)
• Fixed Mqtt adaptor not always cleaning up while closing (PR #1181)
• Fixed MqttTransportHandler not handling ConnectExceptions correctly (#648)
• Fixed the SDK not throwing an exception when the mqtt topic name was too large to publish (#1197)

Microsoft.Azure.Devices v1.18.3

• Upgraded Newtonsoft dependency to 12.0.3

Microsoft.Azure.Devices.Shared v1.16.1

• Upgraded Newtonsoft dependency to 12.0.3

Microsoft.Azure.Devices.Provisioning.Service v1.5.1

• Upgraded Newtonsoft dependency to 12.0.3

Microsoft Azure IoT Hub SDK for C# Public-Preview Release 2019-12-19

Microsoft.Azure.Devices.DigitalTwin.Client.1.0.0-preview-001

• Digital Twin Device Client supports the following feature:
  • Register interfaces implemented by the Digital Twin device instance.

Microsoft.Azure.Devices.DigitalTwin.Service.1.0.0-preview-001

• Digital Twin Service Client supports the following features:
  • Get Digital Twin by ID
  • Get Model by ID
  • Update Digital Twin properties
  • Invoke commands on Digital Twin device instance.

Microsoft Azure IoT Hub SDK for C# Release 2019-12-17

Microsoft.Azure.Devices.Client v1.21.3

• Fix MQTT ReceiveAsync with cancellation token always returns null.
• Fix MQTT packet id becomes 0 on 32kth messages sent which caused MQTT connection drop.
• Fix AMQP SendEventBatchAsync always throws InvalidOperationException.
• Fix AMQP connection throws ObjectDisposedException while OpenAsync failed on open sender link.
• Fix AMQP SendTwinPatchAsync with cancellation token doesn’t cancel after cancellation token is cancelled.
• Revert to throw TimeoutException if operation times out instead of IotHubCommunicationException.
• Revert to throw OperationCancelledException if operation is cancelled instead of IotHubCommunicationException.
• Fix connection string parser to allow special characters such as semicolon.
• Fix a missing await for async task in MQTT which could cause race condition to the connection.
• Add clarification to connection status callback documentation for HTTP.
• Add clarification to device operation timeout documentation.

Microsoft Azure IoT Hub SDK for C# Public-Preview Release 2019-11-21

Microsoft.Azure.Devices.Client.1.29.0-preview-004

• Update Service API version for PnP features
• SDK fixes from Master branch:
  • AMQP transport layer redesign to further stabilize connection pooling and multiplexing features.
  • Upgrading the Amqp library dependency to v2.4.1.
  • Add SQM ID to UserAgent string for non-HTTP protocols.
  • Added ClosedChannelException to the list of retry-able Network Exceptions.
  • Fixed IoTHub connection string parsing logic.
  • Add IsUsable flag to IDelegatingHandler to check MqttTransportHandler state.
  • URL encode device ID and module ID for HsmAuthentication audience.
  • Fix time calculation for AMQP token refresher.
  • Add AMQP token refresh cleanup on device client close or dispose.
  • Fix for safe disposal of device client.
  • Fix to treat exceptions as network exceptions if they are directly defined or derived from exceptions defined in network exceptions list in ErrorDelegatingHandler.
  • Updated Amqp library to use the latest (Microsoft.Azure.Amqp 2.4.2).
  • Fixed incorrect ifdef pragma for server certificate validation.
  • Perform consistent hashing in assigning connections to the connection pool.
  • AMQP resources are no longer disposed on disconnection.
  • AMQP resources are locked to allow synchronized access.
  • AMQP resources are created prior to access.
  • AmqpTransportHandler is not disposed on disconnection.
  • Catch exception while creation of AMQP resources, and if not recoverable, close and recover the owner resource (eg: non-recoverable link creation failure will close and recover the session, non-recoverable session creation failure will close and recover the connection).
  • AmqpUnitManager will handle the lifetime of AmqpUnit.
  • Add expiration date in SharedAccessSignature exception message
  • Return ConnectionStatusChangeReason Device_Disabled as part of the ConnectionStatusChangesHandler callback if IoT hub returns a DeviceNotFoundException.
  • Fix of mqtt droping message while disconnected
  • ReceiveAsync(timeout) changes to fix open issues regarding timeout not being respected on AMQP.
  • Add null checks on Abandon/Reject/CompleteAsync in internal client
  • Fix issue where integer underflow caused exponential backoff time to retry to underflow
  • Fix exception mapping for openlink and opensession failure on AMQP
  • Fix AMQP connection leak with valid X509 cert but invalid device id

Microsoft.Azure.Devices.1.27.0-preview-004

• SDK fixes from Master branch:
  • Added null check for device ID and module ID.
  • Make ConfigurationMetrics on Configuration settable
  • Updated Amqp library to use the latest (Microsoft.Azure.Amqp 2.4.2).

Microsoft Azure IoT Hub SDK for C# Release 2019-11-12

Microsoft.Azure.Devices.Client v1.21.2

• Add expiration date in SharedAccessSignature exception message
• Return ConnectionStatusChangeReason 'Device_Disabled' as part of the ConnectionStatusChangesHandler callback if IoT hub returns a DeviceNotFoundException.
• Fix of mqtt droping message while disconnected
• ReceiveAsync(timeout) changes to fix open issues regarding timeout not being respected on AMQP.
• Add null checks on Abandon/Reject/CompleteAsync in internal client
• Fix issue where integer underflow caused exponential backoff time to retry to underflow
• Fix exception mapping for openlink and opensession failure on AMQP
• Fix AMQP connection leak with valid X509 cert but invalid device id

Microsoft.Azure.Devices v1.18.2

• Make ConfigurationMetrics on Configuration settable

Microsoft Azure IoT Hub SDK for C# Release 2019-9-12

Microsoft.Azure.Devices.Client v1.21.1

• Perform consistent hashing in assigning connections to the connection pool.
• AMQP resources are no longer disposed on disconnection.
• AMQP resources are locked to allow synchronized access.
• AMQP resources are created prior to access.
• AmqpTransportHandler is not disposed on disconnection.
• Catch exception while creation of AMQP resources, and if not recoverable, close and recover the owner resource (eg: non-recoverable link creation failure will close and recover the session, non-recoverable session creation failure will close and recover the connection).
• AmqpUnitManager will handle the lifetime of AmqpUnit.

Device Explorer v1.6.1

• Updated the reference to Microsoft.Azure.Devices v1.18.1.
• Updated the reference to Microsoft.Azure.Devices.Shared v1.16.0.
• Updated the reference to Microsoft.Azure.Amqp v2.4.2.

Microsoft Azure IoT Hub SDK for C# Release 2019-7-26

Microsoft.Azure.Devices.Client v1.21.0

• Add support for Azure Security Center Security Client
• Fix Xamarin user agent issue

Microsoft Azure IoT Hub SDK for C# Release 2019-7-2

Microsoft.Azure.Devices.Client v1.20.3

• Fix to treat exceptions as network exceptions if they are directly defined or derived from exceptions defined in network exceptions list in ErrorDelegatingHandler.
• Updated Amqp library to use the latest (Microsoft.Azure.Amqp 2.4.2).
• Fixed incorrect ifdef pragma for server certificate validation.

Microsoft.Azure.Devices v1.18.1

• Added null check for device ID and module ID.
• Updated Amqp library to use the latest (Microsoft.Azure.Amqp 2.4.2).

Microsoft.Azure.Devices.Provisioning.Transport.Amqp v1.1.9

• Updated Amqp library to use the latest (Microsoft.Azure.Amqp 2.4.2).

Microsoft.Azure.Devices.Provisioning.Security.Tpm v1.1.6

• Updated the version of Microsoft.TSS dependency used.

Microsoft Azure IoT Hub SDK for C# Release 2019-6-6

Microsoft.Azure.Devices.Client v1.20.2

• Add AMQP token refresh cleanup on device client close or dispose.
• Fix for safe disposal of device client.

Microsoft.Azure.Devices v1.18.0

• Add support for Device Scopes.

Microsoft.Azure.Devices.Provisioning.Client v1.4.0

• Add custom payload support for DPS.

Microsoft.Azure.Devices.Provisioning.Transport.Amqp v1.1.8

• Add support for Retry-After header to provisioning device client.
• Add custom payload support for DPS.

Microsoft.Azure.Devices.Provisioning.Transport.Http v1.1.6

• Add support for Retry-After header to provisioning device client.
• Add custom payload support for DPS.

Microsoft.Azure.Devices.Provisioning.Transport.Mqtt v1.1.8

• Add support for Retry-After header to provisioning device client.
• Add custom payload support for DPS.