Periodic Gateway Telemetry Publish

[rodneyosodo]

The Zephyr agent (Aeolus) publishes periodic telemetry with system metrics every telemetry_interval seconds (src/telemetry/telemetry.c):

[
  {"n":"temperature","u":"Cel","v":22.7},
  {"n":"humidity","u":"%RH","v":48.3},
  {"n":"pressure","u":"hPa","v":1003.4}
]

The Linux agent is purely command-driven — it only publishes responses to commands. There is no periodic telemetry.

What to implement:

• Optional periodic telemetry publish (disabled by default)
• Linux-relevant system metrics:
  • CPU usage percentage
  • Memory used/free
  • Disk usage
  • Uptime
  • Network interface stats
• Configurable interval via MG_AGENT_TELEMETRY_INTERVAL env var
• Publish to telemetry topic in SenML format
• Enable/disable via config

Reference: Aeolus telemetry module — src/telemetry/telemetry.c, docs/telemetry.md