1---2name: azure-iot-hub3description: Expert knowledge for Azure IoT Hub development including troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. Use when provisioning devices via DPS, managing twins/jobs/routing, using device streams, or integrating Device Update, and other Azure IoT Hub related development tasks. Not for Azure IoT (use azure-iot), Azure IoT Central (use azure-iot-central), Azure IoT Edge (use azure-iot-edge), Azure Defender For Iot (use azure-defender-for-iot).4---5# Azure IoT Hub Skill67This skill provides expert guidance for Azure IoT Hub. Covers troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. It combines local quick-reference content with remote documentation fetching capabilities.89## How to Use This Skill1011> **IMPORTANT for Agent**: Use the **Category Index** below to locate relevant sections. For categories with line ranges (e.g., `L35-L120`), use `read_file` with the specified lines. For categories with file links (e.g., `[security.md](security.md)`), use `read_file` on the linked reference file1213> **IMPORTANT for Agent**: If `metadata.generated_at` is more than 3 months old, suggest the user pull the latest version from the repository. If `mcp_microsoftdocs` tools are not available, suggest the user install it: [Installation Guide](https://github.com/MicrosoftDocs/mcp/blob/main/README.md)1415This skill requires **network access** to fetch documentation content:16- **Preferred**: Use `mcp_microsoftdocs:microsoft_docs_fetch` with query string `from=learn-agent-skill`. Returns Markdown.17- **Fallback**: Use `fetch_webpage` with query string `from=learn-agent-skill&accept=text/markdown`. Returns Markdown.1819## Category Index2021| Category | Lines | Description |22|----------|-------|-------------|23| Troubleshooting | L37-L53 | Diagnosing and fixing IoT Hub, DPS, and Device Update issues: connectivity, routing, proxy/storage errors, error codes, and collecting/using diagnostic and device logs. |24| Best Practices | L54-L63 | Best practices for secure, scalable IoT Hub/DPS deployments: device provisioning at scale, OEM security, cert renewal/ADR, resilient reconnection, auto device config, and IoT Hub hardening. |25| Decision Making | L64-L76 | Guidance for choosing IoT Hub vs alternatives, tiers/scale, pricing, routing, comms patterns (C2D/D2C), monitoring methods, and when to use or disable disaster recovery. |26| Architecture & Design Patterns | L77-L83 | Design patterns for DPS lifecycle/HA/DR, VNet connectivity, secure device streams, and reliably persisting ordered IoT Hub events with Cosmos DB. |27| Limits & Quotas | L84-L89 | Details on IoT Hub and Device Update service limits, quotas, throttling behavior, and how many devices/operations you can scale to before hitting constraints. |28| Security | L90-L128 | Securing IoT Hub, DPS, and Device Update: auth (Entra ID, RBAC, SAS, X.509), certificates and revocation, TLS/ciphers, keys, network/IP controls, private endpoints, and Azure Policy compliance. |29| Configuration | L129-L170 | Configuring IoT Hub and DPS: enroll devices, manage certificates and ADR, set twins, jobs, routing, endpoints, file upload, message enrichments, queries, and monitoring/metrics/logs. |30| Integrations & Coding Patterns | L171-L195 | Patterns and code samples for connecting devices/DPS to IoT Hub (MQTT/HTTPS/AMQP), managing identities/twins/files, direct methods, C2D messages, bulk ops, and message formats. |31| Deployment | L196-L207 | Deploying and updating IoT Hubs and devices: region/SKU migration, failover, ARM/Bicep deployments, Device Update (image/package, proxy, OS support), and scheduling jobs via CLI. |3233### Troubleshooting34| Topic | URL |35|-------|-----|36| Diagnose and fix common Azure DPS provisioning errors | https://learn.microsoft.com/en-us/azure/iot-dps/how-to-troubleshoot-dps |37| Use Agent Check to diagnose missing Device Update devices | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-agent-check |38| Use Device Update diagnostics, error codes, and logs | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-diagnostics |39| Interpret Device Update for IoT Hub error codes | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-error-codes |40| Collect and review Device Update diagnostic logs remotely | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-log-collection |41| Resolve proxy update import errors in Device Update | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-proxy-update-troubleshooting |42| Diagnose and fix common Device Update issues | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/troubleshoot-device-update |43| Fix storage permission errors when importing Device Updates | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/troubleshoot-storage |44| Collect device debug logs using IoT SDKs | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-collect-device-logs |45| Monitor and troubleshoot IoT Hub device connectivity | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-troubleshoot-connectivity |46| Resolve Azure IoT Hub error codes | https://learn.microsoft.com/en-us/azure/iot-hub/troubleshoot-error-codes |47| Troubleshoot Azure IoT Hub message routing issues | https://learn.microsoft.com/en-us/azure/iot-hub/troubleshoot-message-routing |48| Troubleshoot device connectivity to Azure IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/tutorial-connectivity |4950### Best Practices51| Topic | URL |52|-------|-----|53| Apply DPS best practices for large-scale IoT deployments | https://learn.microsoft.com/en-us/azure/iot-dps/concepts-deploy-at-scale |54| Implement OEM security practices for DPS-enabled devices | https://learn.microsoft.com/en-us/azure/iot-dps/concepts-device-oem-security-practices |55| Plan and execute IoT certificate renewal with ADR | https://learn.microsoft.com/en-us/azure/iot-hub/concept-certificate-renewal |56| Design resilient Azure IoT Hub device reconnection | https://learn.microsoft.com/en-us/azure/iot-hub/concepts-manage-device-reconnections |57| Apply IoT Hub automatic device configuration best practices | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-configuration-best-practices |58| Apply security best practices to Azure IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/secure-azure-iot-hub |5960### Decision Making61| Topic | URL |62|-------|-----|63| Decide when to disable IoT Hub disaster recovery | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-disable-dr |64| Choose between Azure IoT Hub and Event Hubs | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-compare-event-hubs |65| Choose IoT Hub cloud-to-device communication option | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-c2d-guidance |66| Choose IoT Hub device-to-cloud communication option | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-d2c-guidance |67| Understand Azure IoT Hub pricing and metering | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-pricing |68| Decide between IoT Hub routing and Event Grid | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-event-grid-routing-comparison |69| Select the right Azure IoT Hub tier and scale | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-scaling |70| Select and upgrade Azure IoT Hub tier and size | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-upgrade |71| Choose IoT Hub device connection monitoring method | https://learn.microsoft.com/en-us/azure/iot-hub/monitor-device-connection-state |7273### Architecture & Design Patterns74| Topic | URL |75|-------|-----|76| Plan DPS device lifecycle and reprovisioning policies | https://learn.microsoft.com/en-us/azure/iot-dps/concepts-device-reprovision |77| Design DPS high availability and disaster recovery | https://learn.microsoft.com/en-us/azure/iot-dps/iot-dps-ha-dr |78| Use virtual network connectivity patterns with DPS | https://learn.microsoft.com/en-us/azure/iot-dps/virtual-network-support |7980### Limits & Quotas81| Topic | URL |82|-------|-----|83| Review Azure Device Update service limits | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-limits |84| Azure IoT Hub quotas, limits, and throttling behavior | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-quotas-throttling |8586### Security87| Topic | URL |88|-------|-----|89| Secure DPS APIs using Microsoft Entra ID and RBAC | https://learn.microsoft.com/en-us/azure/iot-dps/concepts-control-access-dps-azure-ad |90| Configure DPS access control with SAS tokens | https://learn.microsoft.com/en-us/azure/iot-dps/how-to-control-access |91| Revoke or disenroll device access in DPS securely | https://learn.microsoft.com/en-us/azure/iot-dps/how-to-revoke-device-access-portal |92| Roll and update X.509 certificates in DPS | https://learn.microsoft.com/en-us/azure/iot-dps/how-to-roll-certificates |93| Deprovision DPS devices and revoke IoT Hub access | https://learn.microsoft.com/en-us/azure/iot-dps/how-to-unprovision-devices |94| Verify X.509 CA certificates with DPS proof-of-possession | https://learn.microsoft.com/en-us/azure/iot-dps/how-to-verify-certificates |95| Configure IP filtering rules for Azure IoT DPS | https://learn.microsoft.com/en-us/azure/iot-dps/iot-dps-ip-filtering |96| Manage public network access and private endpoints for DPS | https://learn.microsoft.com/en-us/azure/iot-dps/public-network-access |97| Configure TLS versions and ciphers for DPS connections | https://learn.microsoft.com/en-us/azure/iot-dps/tls-support |98| Assign RBAC roles for Device Update and IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/configure-access-control-device-update |99| Set up private endpoints for Device Update accounts | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/configure-private-endpoints |100| Configure RBAC and Entra auth for Device Update | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-control-access |101| Configure data encryption and CMKs for Device Update | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-data-encryption |102| Configure network ports for Device Update traffic | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-networking |103| Prepare for Device Update root key rotations | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-rootkey |104| Understand end-to-end security in Device Update | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-security |105| Configure network security and private access for Device Update | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/network-security |106| Secure IoT Hub APIs with Microsoft Entra ID and RBAC | https://learn.microsoft.com/en-us/azure/iot-hub/authenticate-authorize-azure-ad |107| Control IoT Hub access with SAS tokens | https://learn.microsoft.com/en-us/azure/iot-hub/authenticate-authorize-sas |108| Authenticate IoT Hub devices with X.509 certificates | https://learn.microsoft.com/en-us/azure/iot-hub/authenticate-authorize-x509 |109| Manage certificate revocation and policies for IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/concepts-certificate-policy-management |110| Manage IoT Hub device identities and connection strings | https://learn.microsoft.com/en-us/azure/iot-hub/create-connect-device |111| Revoke device certificates and clean up ADR policies | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-revoke-certificate-delete-policy |112| Use Azure IoT Hub identity registry for device management | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-identity-registry |113| Configure IP filtering rules for Azure IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-ip-filtering |114| Use managed identities with Azure IoT Hub egress | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-managed-identity |115| Manage public network access for Azure IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-public-network-access |116| Restrict IoT Hub outbound network access for DLP | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-restrict-outbound-network-access |117| TLS versions and cipher requirements for IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-tls-support |118| Migrate IoT Hub TLS root certificate to DigiCert G2 | https://learn.microsoft.com/en-us/azure/iot-hub/migrate-tls-certificate |119| Built-in Azure Policy definitions for IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/policy-reference |120| Regenerate IoT Hub shared access keys safely | https://learn.microsoft.com/en-us/azure/iot-hub/regenerate-keys |121| Azure Policy compliance controls for IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/security-controls-policy |122| Create and upload X.509 test certificates for IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/tutorial-x509-test-certs |123| Connect Azure IoT Hub with virtual networks securely | https://learn.microsoft.com/en-us/azure/iot-hub/virtual-network-support |124125### Configuration126| Topic | URL |127|-------|-----|128| Manage DPS device enrollments in Azure portal | https://learn.microsoft.com/en-us/azure/iot-dps/how-to-manage-enrollments |129| Link and manage IoT hubs in DPS | https://learn.microsoft.com/en-us/azure/iot-dps/how-to-manage-linked-iot-hubs |130| Configure DPS allocation policies across IoT hubs | https://learn.microsoft.com/en-us/azure/iot-dps/how-to-use-allocation-policies |131| Query and manage DPS instance IP address properties | https://learn.microsoft.com/en-us/azure/iot-dps/iot-dps-understand-ip-address |132| Reference for Azure DPS monitoring metrics and logs | https://learn.microsoft.com/en-us/azure/iot-dps/monitor-iot-dps-reference |133| Create apt manifests for package-based Device Updates | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-apt-manifest |134| Configure adu-config.json for Device Update agents | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-configuration-file |135| Configure multistep execution in Device Update manifests | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-multi-step-updates |136| Author JSON import manifests for Device Update | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/import-schema |137| Configure related files in Device Update import manifests | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/related-files |138| Define update manifest payloads for Device Update | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/update-manifest |139| Configure ADR credential for Microsoft-backed certificates | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-configure-credential |140| Create or edit Microsoft-root CA policy in ADR | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-create-policy |141| Configure ADR policy with external root CA | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-create-policy-external-certificate |142| Disable or enable IoT devices in Azure Device Registry | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-disable-enable-device |143| Configure IoT Hub file upload to Azure Storage | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-configure-file-upload |144| Handle customer data requests for IoT Hub devices | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-customer-data-requests |145| Understand and configure Azure IoT Hub device twins | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-device-twins |146| Configure and use IoT Hub direct methods | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-direct-methods |147| Configure and use Azure IoT Hub device and service endpoints | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-endpoints |148| Use IoT Hub file upload for large device data | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-file-upload |149| Configure and manage Azure IoT Hub jobs for device fleets | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-jobs |150| Configure cloud-to-device messaging in IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-messages-c2d |151| Configure IoT Hub device-to-cloud message routing | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-messages-d2c |152| Understand and configure Azure IoT Hub module twins | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-module-twins |153| Configure IoT Hub communication protocols and ports | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-protocols |154| Use Azure IoT Hub query language for twins and jobs | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-query-language |155| Use IoT Hub message routing query language | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-routing-query-syntax |156| Deploy IoT Hub with ADR and certificate management | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-device-registry-setup |157| Configure message enrichments in Azure IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-message-enrichments-overview |158| Non-telemetry event schemas for Azure IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-non-telemetry-event-schema |159| Understand and manage Azure IoT Hub IP addresses | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-understand-ip-address |160| Manage IoT Hub device and module twins via portal and CLI | https://learn.microsoft.com/en-us/azure/iot-hub/manage-device-twins |161| Reference metrics and logs for monitoring Azure IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/monitor-iot-hub-reference |162| Run and interpret queries on Azure IoT Hub jobs | https://learn.microsoft.com/en-us/azure/iot-hub/query-jobs |163| Query IoT Hub device and module twins | https://learn.microsoft.com/en-us/azure/iot-hub/query-twins |164| Use the Azure IoT Hub VS Code extension | https://learn.microsoft.com/en-us/azure/iot-hub/reference-iot-hub-extension |165| Set up and use IoT Hub message enrichments | https://learn.microsoft.com/en-us/azure/iot-hub/tutorial-message-enrichments |166167### Integrations & Coding Patterns168| Topic | URL |169|-------|-----|170| Send additional payload data between devices and DPS | https://learn.microsoft.com/en-us/azure/iot-dps/how-to-send-additional-data |171| Use raw HTTPS with DPS symmetric key provisioning | https://learn.microsoft.com/en-us/azure/iot-dps/iot-dps-https-sym-key-support |172| Use raw HTTPS with DPS X.509 certificate provisioning | https://learn.microsoft.com/en-us/azure/iot-dps/iot-dps-https-x509-support |173| Connect devices to Azure IoT DPS over MQTT | https://learn.microsoft.com/en-us/azure/iot-dps/iot-mqtt-connect-to-iot-dps |174| Programmatically create DPS TPM individual enrollments | https://learn.microsoft.com/en-us/azure/iot-dps/quick-enroll-device-tpm |175| Programmatically create DPS X.509 enrollment groups | https://learn.microsoft.com/en-us/azure/iot-dps/quick-enroll-device-x509 |176| Implement Device Update component enumerator via proxy | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/components-enumerator |177| Send and receive IoT Hub cloud-to-device messages with SDKs | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-cloud-to-device-messaging |178| Implement device management actions using IoT Hub direct methods | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-device-management |179| Use IoT Hub device and service SDKs with device twins | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-device-twins |180| Upload device files to cloud using IoT Hub SDKs | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-file-upload |181| Use module identities and twins with IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-module-twins |182| Use IoT Hub service SDK to schedule broadcast jobs | https://learn.microsoft.com/en-us/azure/iot-hub/how-to-schedule-broadcast-jobs |183| Use AMQP protocol with Azure IoT Hub endpoints | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-amqp-support |184| Bulk import and export IoT Hub device identities | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-bulk-identity-mgmt |185| Construct Azure IoT Hub message formats | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-messages-construct |186| Read IoT Hub messages from built-in endpoint | https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-messages-read-builtin |187| Connect devices to Azure IoT Hub using MQTT | https://learn.microsoft.com/en-us/azure/iot-hub/iot-mqtt-connect-to-iot-hub |188| Control IoT devices via direct methods using .NET samples | https://learn.microsoft.com/en-us/azure/iot-hub/quickstart-control-device |189| Use PowerShell script to self-sign IoT Hub CSR certificates | https://learn.microsoft.com/en-us/azure/iot-hub/reference-self-sign-script |190| Connect IoT devices to Azure IoT Hub via MQTT | https://learn.microsoft.com/en-us/azure/iot-hub/tutorial-use-mqtt |191192### Deployment193| Topic | URL |194|-------|-----|195| Perform proxy updates with Device Update for IoT Hub | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-howto-proxy-updates |196| Deploy image-based Device Update on Raspberry Pi | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-raspberry-pi |197| Use regional failover mappings for Device Update | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-region-mapping |198| Deploy package-based Device Update with Ubuntu agent | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-ubuntu-agent |199| Check OS and component support for Device Update | https://learn.microsoft.com/en-us/azure/iot-hub-device-update/support |200| Manually migrate Azure IoT Hub across regions or SKUs | https://learn.microsoft.com/en-us/azure/iot-hub/migrate-hub-arm |201| Migrate Azure IoT Hub using Azure CLI state commands | https://learn.microsoft.com/en-us/azure/iot-hub/migrate-hub-state-cli |202| Schedule IoT Hub jobs for device groups using Azure CLI | https://learn.microsoft.com/en-us/azure/iot-hub/schedule-jobs-cli |203| Perform manual failover for an Azure IoT hub | https://learn.microsoft.com/en-us/azure/iot-hub/tutorial-manual-failover |
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