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Merged
merged 2 commits into from
Sep 6, 2021
Merged

Blinka import #10

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1461df5
add const import
AVanVlack Sep 5, 2021
d74daa0
fixed example 1 hertz
AVanVlack Sep 5, 2021
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18 changes: 11 additions & 7 deletions README.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -92,20 +92,24 @@ For humidity compensated raw gas and voc index readings, we'll need a secondary
humidity = bme280.relative_humidity

# For compensated raw gas readings
compensated_raw_gas = sgp.measure_raw(temperature = temperature, relative_humidity = humidity)

time.sleep(1)
"""
compensated_raw_gas = sgp.measure_raw(
temperature=temperature, relative_humidity=humidity
)
print("Raw Data:", compensated_raw_gas)
"""

# For Compensated voc index readings
voc_index = sgp.measure_index(temperature = temperature, relative_humidity = humidity)
voc_index = sgp.measure_index(
temperature=temperature, relative_humidity=humidity)

print(compensated_raw_gas)
print(voc_index)
print("VOC Index:", voc_index)
print("")
time.sleep(1)


It may take several minutes for the VOC index to start changing as it calibrates the baseline readings.
The voc algorithm expects a 1 hertz sampling rate. Run `measure_index()` once per second.


Contributing
============
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1 change: 1 addition & 0 deletions adafruit_sgp40/voc_algorithm.py
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Expand Up @@ -11,6 +11,7 @@
* Author(s): yangfeng

"""
from micropython import const

_VOCALGORITHM_SAMPLING_INTERVAL = const(1)
_VOCALGORITHM_INITIAL_BLACKOUT = const(45)
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7 changes: 4 additions & 3 deletions examples/sgp40_indextest.py
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Expand Up @@ -18,18 +18,19 @@
humidity = bme280.relative_humidity

# For compensated raw gas readings
"""
compensated_raw_gas = sgp.measure_raw(
temperature=temperature, relative_humidity=humidity
)

time.sleep(1)
print("Raw Data:", compensated_raw_gas)
"""

# For Compensated voc index readings
# The algorithm expects a 1 hertz sampling rate. Run "measure index" once per second.
# It may take several minutes for the VOC index to start changing
# as it calibrates the baseline readings.
voc_index = sgp.measure_index(temperature=temperature, relative_humidity=humidity)

print("Raw Data:", compensated_raw_gas)
print("VOC Index:", voc_index)
print("")
time.sleep(1)