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Update SGP30 for the correct eCO2 and TVOC baseline (#458)

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* Update SGP30 for the correct eCO2 and TVOC baseline

* Apply suggestions from code review

Fix incorrect markdown syntax

Co-Authored-By: Otto Winter <otto@otto-winter.com>

Co-authored-by: Otto Winter <otto@otto-winter.com>
This commit is contained in:
Panuruj Khambanonda (PK) 2020-01-12 07:42:24 -08:00 committed by Otto Winter
parent 3974418c3f
commit 4ff46e74e2
1 changed files with 11 additions and 5 deletions
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16
components/sensor/sgp30.rst
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@ -51,8 +51,11 @@ Configuration variables:
Advanced:
- **baseline** (*Optional*, int): The baseline value for the unit, for calibration
purposes. See :ref:`sgp30-calibrating` for more info.
- **baseline** (*Optional*): The block containing baselines for calibration purposes. See :ref:`sgp30-calibrating` for more info.
- **eco2_baseline** (**Required**, int): The eCO2 baseline for calibration purposes.
- **tvoc_baseline** (**Required**, int): The TVOC baseline for calibration purposes.
- **compensation** (*Optional*): The block containing sensors used for compensation.
@ -67,7 +70,7 @@ Advanced:
Calibrating Baseline
--------------------
The SGP30 sensor will re-calibrate its baseline each time it is powered on. During the first power-up this can take upto 12 hours.
The SGP30 sensor will re-calibrate its baseline each time it is powered on. During the first power-up this can take up to 12 hours.
For best performance and faster startup times, the current **baseline** needs to be persistently stored on the device before shutting it down and set again accordingly after boot up
that also means that if the sensor reboots at a time when the air is less clean than normal,
@ -75,7 +78,7 @@ the values will have a constant offset and cannot be compared to the values befo
boot.
To do this, let the sensor boot up with no baseline set and let the sensor calibrate itself. After around 12 hours you can then view the remote logs on the ESP. The next
time the sensor is read out, you will see a log message with something like ``Current eCO2 & TVOC baseline: 0x44D4``.
time the sensor is read out, you will see a log message with something like ``Current eCO2 baseline: 0x86C5, TVOC baseline: 0x8B38``.
Now set the baseline property in your configuration file like so with the value you got
via the logs:
@ -86,7 +89,9 @@ via the logs:
sensor:
- platform: sgp30
# ...
baseline: 0x44D4
baseline:
eco2_baseline: 0x86C5
tvoc_baseline: 0x8B38
The next time you upload the code, the SGP30 will be continue its operation with this baseline and you will get consistent values.
@ -101,5 +106,6 @@ See Also
- :doc:`dht12`
- :doc:`hdc1080`
- :doc:`htu21d`
- :doc:`sht3xd`
- :apiref:`sgp30/sgp30.h`
- :ghedit:`Edit`