SGP40.VocIndex (sgp40 v0.1.2) View Source
Process the raw output of the SGP40 sensor into the VOC Index.
Link to this section Summary
Functions
Returns a specification to start this module under a supervisor.
Get current algorithm states. Retrieved values can be used in
set_states/1
to resume operation after a short interruption,
skipping initial learning phase. This feature can only be used after at least
3 hours of continuous operation.
Calculate the VOC index value from the raw sensor value.
Set previously retrieved algorithm states to resume operation after a short
interruption, skipping initial learning phase. This feature should not be
used after inerruptions of more than 10 minutes. Call this once after
start_link/1
and the optional set_tuning_params/1
, if
desired. Otherwise, the algorithm will start with initial learning phase.
Set parameters to customize the VOC algorithm. Call this once after
start_link/1
, if desired. Otherwise, the default values will be used.
Initialize the VOC algorithm parameters. Call this once at the beginning or whenever the sensor stopped measurements.
Link to this section Functions
Returns a specification to start this module under a supervisor.
See Supervisor
.
Specs
Get current algorithm states. Retrieved values can be used in
set_states/1
to resume operation after a short interruption,
skipping initial learning phase. This feature can only be used after at least
3 hours of continuous operation.
Specs
process(0..65535) :: {:ok, 1..500} | {:error, any()}
Calculate the VOC index value from the raw sensor value.
Specs
Set previously retrieved algorithm states to resume operation after a short
interruption, skipping initial learning phase. This feature should not be
used after inerruptions of more than 10 minutes. Call this once after
start_link/1
and the optional set_tuning_params/1
, if
desired. Otherwise, the algorithm will start with initial learning phase.
Specs
set_tuning_params(%{ voc_index_offset: 0..2_147_483_647, learning_time_hours: 0..2_147_483_647, gating_max_duration_minutes: 0..2_147_483_647, std_initial: 0..2_147_483_647 }) :: {:ok, binary()} | {:error, any()}
Set parameters to customize the VOC algorithm. Call this once after
start_link/1
, if desired. Otherwise, the default values will be used.
Specs
start_link(any()) :: GenServer.on_start()
Initialize the VOC algorithm parameters. Call this once at the beginning or whenever the sensor stopped measurements.