gas_baseline - bruno-beloff/scs_mfr GitHub Wiki

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DESCRIPTION

The gas_baseline utility is used to adjust the zero offset for electrochemical sensors, as interpreted by the current gas interpretation machine learning model.

WARNING: because ML models typically do not report negative values, the effect of raising the offset above zero is to raise the limit of detection of the sensor system.

Each sensor is identified by the gas that it detects. For example, a nitrogen dioxide sensor is identified as NO2, and an ozone sensor is identified as Ox.

Note that the scs_dev/gasses_sampler and greengrass processes must be restarted for changes to take effect.

SYNOPSIS

gas_baseline.py [{ -b GAS | { -s | -o } GAS VALUE | -c GAS CORRECT REPORTED | -z | -d }] [-v]

Options
--version	show program's version number and exit
-h, --help	show this help message and exit
-b BASELINE, --baseline=BASELINE	report offset for GAS
-s SET, --set=SET	set offset for GAS to integer VALUE
-o OFFSET, --offset=OFFSET	change offset for GAS, by integer VALUE
-c CORRECT, --correct=CORRECT	change offset for GAS, by the difference between CORRECT and REPORTED values
-z, --zero	zero all offsets
-d, --delete	delete the baseline configuration
-v, --verbose	report narrative to stderr

EXAMPLES

./gas_baseline.py -c NO2 10 23

DOCUMENT EXAMPLE

{"CO": {"calibrated-on": "2021-01-19T10:07:27Z", "offset": 2}, "NO2": {"calibrated-on": "2021-01-19T10:07:27Z", "offset": 1}}

FILES

~/SCS/conf/gas_baseline.json