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Devices

A device represents a registered IoT endpoint — a physical sensor, gateway, actuator, or any hardware that connects to IOTMER via MQTT.

Device lifecycle​

Template (optional)
      │
      ▼
  Create Device ──► Auto-generated MQTT credentials
      │
      ▼
  Device connects via MQTT
      │
      ├──► State updated (last reported payload)
      ├──► ACLs enforce topic permissions
      └──► Firmware rollout (if applicable)

Key concepts​

  • Credentials — each device gets a unique MQTT username and password at creation. These can be reset.
  • Custom fields — typed metadata (string, number, boolean, JSON) attached to a device. Useful for serial numbers, hardware versions, location, etc.
  • MQTT ACLs — per-device rules controlling which topics the device can publish to or subscribe from
  • State — the last payload reported by the device, stored and queryable
  • Device templates — blueprint for a model (capabilities, JSON defaults, optional auto device_key pattern, default MQTT ACLs) before you create devices. See Device Templates.
  • Firmware & Rollouts — distribute firmware updates across your fleet. See Firmware and Rollouts.

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