Remove send_test_config() call - vendor software doesn't send 8C 2B for
each single test, only when changing modes. Remove set_integration_time()
from spectrometer.py - vendor doesn't send 8C 01 either.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The device needs the test config commands to enter single-test mode.
Without them it behaves as continuous start+stop. Supports auto_psu flag
so the device can handle PSU on/off automatically.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Stop command triggers a one-shot reading instead of start+poll+stop.
spectrometer.py now uses take_single_reading() for this flow.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
