Author and editor
Visoar
IoT product strategy, platform architecture, industrial connectivity, and AI-assisted device operations.
IoT architectureMQTTIndustrial IoTAIoTProduct systems
Published and maintained
Maintained work
casesWhy an Industrial Agent Must Not Directly Control a PLCguidesAlerts vs Events: Design an Operational ModeltopicsBluetooth Low Energy: GATT, Power, and Product BoundariessignalsBluetooth Core 6.3: Precision and Interface UpdatestoolsMQTT Broker Capacity EstimatorguidesBuild vs Buy an IoT PlatformtopicsCoAP: RESTful Messaging for Constrained DevicescasesWhy Cold-Chain Alerts Failed to Close the LoopcasesWhy Connected Devices Produced No Business ValuesignalsEU Cyber Resilience Act: Article 14 Reporting Starts in September 2026topicsDevice Identity: Credentials, Ownership, and LifecycleguidesHow to Design Device IdentityguidesHow to Design Device MessagesguidesFrom Device Events to a Closed Operations LooptopicsDevice Shadows: Desired, Reported, and Uncertain StateguidesHow to Design a Device ShadowtopicsDigital Twins: Models, State, and Decision ContexttopicsEdge Gateways: The Boundary Between Field and CloudguidesEdge vs Cloud: Where Processing Should LivetopicsInternet of Things (IoT): A Systems DefinitiontopicsIoT Agents: Authority, Evidence, and Safe ActionguidesHow to Design Authority for IoT AgentstoolsIoT Architecture Review ChecklistguidesHow to Estimate IoT Platform CapacityguidesIoT SaaS Multi-Tenant IsolationtopicsIoT Security: A Lifecycle Control SystemguidesHow to Select IoT Time-Series StoragetopicsLoRaWAN: Long-Range, Low-Power Network DesigntopicsLTE Cat 1 and Cat 1 bis for IoT ProductsguidesHow to Survive a Fleet Reconnect StormtopicsMatter: Interoperability Above IPsignalsMatter 1.6: What NFC Commissioning and Joint Fabric ChangecasesHow a Reconnect Storm Overwhelms an IoT PlatformtopicsModbus: Registers, Function Codes, and Integration LimitstoolsModbus Register ConverterguidesModbus to MQTT: A Reliable Edge PatternguidesModbus vs OPC UA: Different Layers, Different JobstopicsMQTT: Protocol, Architecture, and Production PracticeguidesMQTT 3.1.1 vs MQTT 5guidesHow to Design MQTT ACLstoolsMQTT Bandwidth CalculatortopicsMQTT Brokers: Responsibilities and Selection BoundariesguidesHow to Select an MQTT BrokerguidesHow to Choose MQTT QoStoolsMQTT Topic CheckerguidesHow to Design MQTT Topics for ProductionguidesMQTT vs HTTP: How to ChoosetopicsNB-IoT: Cellular Connectivity for Low-Throughput FleetssignalsNIST IR 8349: Characterizing IoT Network BehaviorguidesHow to Handle Offline DevicestopicsOPC UA: Information Models and Secure Industrial InteroperabilitysignalsOPC UA Security Depends on Deployment, Not the Protocol NametopicsOTA Updates: Safe Fleet Software DeliverytoolsOTA Release Readiness CheckerguidesHow to Design OTA RollbackguidesHow to Stage OTA RolloutstoolsIoT Payload Size CalculatorguidesPer-Device Keys vs CertificatestopicsRule Engines: Turning Telemetry into Governed EventstopicsSparkplug B: MQTT State Management for Industrial SystemstopicsThing Models: Shared Semantics Without False UniformitytopicsTime-Series Databases for IoT WorkloadstopicsZigbee: Mesh Networking, Security, and Ecosystem FitsignalsZigbee 4.0: Security, Commissioning, and Sub-GHz Direction