Device Access

Device Access Path

1. For common directly connected devices, start with MQTT Device Access.
2. For industrial acquisition, sensors, and meters, choose Modbus RTU or Modbus TCP according to the field link.
3. For existing private-protocol devices, read TCP Access, HTTP Access, CoAP Access, or JT808 Device Access.
4. When one gateway manages multiple devices, focus on Gateway and Sub-Devices.
5. When devices cannot connect, report data, or receive commands, follow Device Access Troubleshooting.

Common Tasks

MQTT AccessAuthentication format, topic definitions, property reporting, command delivery, and OTA topics.Modbus RTU AccessSerial device collection, register parsing, and polling task configuration.Modbus TCP AccessIndustrial gateway, PLC, collector, and other TCP access scenarios.Gateway And Sub-DevicesConfigure sub-products, sub-device addresses, gateway collection, and data ownership.JT808 AccessVehicle terminal registration, authentication, location, alarm, and command delivery.Video Device AccessAccess cameras, NVR, and video streams through GB28181.Access TroubleshootingLocate issues by product, device, network, authentication, payload, and logs.Configure Product ModelConfigure products, protocols, thing models, and release status before device access.

Catalog

• MQTT Device Access
• Video Device Access
• Modbus protocol access
• Modbus TCP Device Access
• TCP Device Access
• Gateway and sub-device
• HTTP Device Access
• CoAP Device Access
• JT808 Device Access
• Device Access Troubleshooting