pytweezer.loggers.ni_adc_logger module

Example logger that owns its own device: an NI ADC read with nidaqmx.

This is the template for the intended Logger model — a Logger opens and owns its data source directly (real or virtual), rather than polling an existing device RPC server. Here the source is a National Instruments analog-input DAQ: the logger creates its own nidaqmx.Task, reads the configured channels on each interval, and pushes the voltages to InfluxDB.

Config entry shape (CONFIG["Loggers"][name]):

{
    "active": True,
    "script": "../pytweezer/servers/logger_server.py",
    "logger": "ni_adc",
    "host": SERVER_HOST,
    "interval": 1.0,
    "simulate": SIMULATING,             # True -> no hardware, fake readings
    "channels": ["Dev1/ai0", "Dev1/ai1"],
    "measurement": "ni_adc",            # optional; defaults to "ni_adc"
    "tags": {"system": "Rb"},           # optional static tags
}

To add another owns-its-device logger, copy this class, override setup/ read/close, and register it in logger_server.LOGGER_REGISTRY.

class pytweezer.loggers.ni_adc_logger.NIADCLogger(name, conf)

Bases: Logger

Read analog-input voltages off an NI DAQ and log them as one measurement.

close()

Release resources. Override to add teardown, but call super().close().

read()

Return an iterable of (measurement, fields, tags) tuples, or None.

Called every interval seconds by run(). Override this in a polling logger. tags may be None.

setup()

Open connections / prepare state. Override as needed (default: no-op).