Each monitor poll was sending DOD? + Measure? (two commands), and the NL43
enforces >=1s between commands, so updates were ~2.5s apart. The run state
changes rarely, so cache it and refresh via Measure? only every
MONITOR_STATE_REFRESH_S (default 30s); most polls now send just DOD? (one
rate-limited command) -> ~1.3s/update. Also trim MONITOR_POLL_INTERVAL to
0.25s since the device rate-limit is the real pacer.
request_dod() gains an optional measurement_state arg: when supplied it
reuses that state and skips the Measure? round-trip; None preserves the old
query-every-time behavior.
~1Hz is the device floor for DOD (the >=1s command spacing); DRD's 10Hz
push isn't reachable via polling, but ~1s is a normal cadence for SLM levels.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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