IoTBackend

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Device Not Connecting ​

Use this checklist when a device cannot connect.

1) Wi-Fi ​

  • Verify SSID/password
  • Check signal quality near the device

2) MQTT credentials ​

  • Client ID must match device UID
  • Username/password must be from that same device

3) Secure port ​

Use a supported secure port:

  • 8883 (recommended)
  • 443 (supported)

If you use the standard IoTBackend firmware template, certificate handling is already built into the core.

4) Topic setup ​

  • Device subscribes to devices/{uid}/command
  • Device publishes telemetry to devices/{uid}/telemetry

5) Dashboard behavior ​

After reconnection, the page may show RECONNECTING briefly before ONLINE. If no telemetry arrives, it will become OFFLINE.