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131 lines
4.0 KiB
ReStructuredText
131 lines
4.0 KiB
ReStructuredText
.. include:: ../Plugin/_plugin_substitutions_p05x.repl
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.. _P052_S8_page:
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S8
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==
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|P052_typename|
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|P052_status|
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.. image:: P052_S8_1.jpg
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Introduction
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------------
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This is the flagship CO2 sensor from Swedish company Senseair.
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Specifications:
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* 400 to 2000 ppm
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* 5V (4.5-5.25VDC)
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* Peak 300mA, avarage 30mA
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* 8.5 x 33.5 x 20 mm
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* UART communication
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* 15 years life span
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* No burn-in needed, will stabilize after 8 days at worst depending on placement environment
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Wiring
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------
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Circuit wiring (S8 seen from PCB side, with the 5 vias down and the 4 vias up):
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.. code-block:: html
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ESP S8
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GPIO (7) <--> TX (3rd via [middle] of the 5 vias)
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GPIO (8) <--> RX (4th via [right of TX])
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Power
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5.0V <--> VCC (4th via of the 4 vias, 300 mA peak/30 mA average)
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GND <--> GND (3rd via [left of VCC])
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Set up the S8 according to this simple schematics. If you want to take extra precautions you should add 47R
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resistor or similar to the TX and RX signals (this is not used in the pictures below). In this example we
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use the Wemos D1 mini as the host of the 5V input to the S8 and connect the Wemos to USB for power.
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.. danger::
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Power needed: 4.5-5.25V. PLEASE OBSERVE THAT FEEDING THE S8 WITH 5.2+V WILL DAMAGE THE INTERNAL LAMP AND BREAK THE UNIT - GIVING FALSE VALUES!
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Setup
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-----
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.. image:: P052_Setup_S8_1.png
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Task settings
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~~~~~~~~~~~~~
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* **Device**: Name of plugin
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* **Name**: Name of the task (example name **CO2**)
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* **Enable**: Should the task be enabled or not
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Sensor
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^^^^^^
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* **GPIO <-- TX**: TX is generally set to **GPIO 13 (D7)**.
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* **GPIO --> RX**: RX is generally set to **GPIO 15 (D8)**.
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* **Sensor**: Only **Carbond Dioxide** is supported by the S8.
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.. note:: TX GPIO 1 (D10) and RX GPIO 3 (D9) is hardware serial and have been reported to work better for some users over time compared to the
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bit-banging (soft) serial used over GPIO 13 and 15.
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Data acquisition
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^^^^^^^^^^^^^^^^
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* **Send to controller** 1..3: Check which controller (if any) you want to publish to. All or no controller can be used.
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* **Interval**: How often should the task publish its value (5..15 seconds is normal).
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Indicators (recommended settings)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. csv-table::
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:header: "Indicator", "Value Name", "Interval", "Decimals", "Extra information"
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:widths: 8, 5, 5, 5, 40
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"Error status", "N/A", "", "", "Used for tSense (K70), K30, K33"
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"Carbon dioxide", "ppm", "15", "0", ""
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"Temperature", "N/A", "", "", "Used for tSense (K70), K30, K33"
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"Humidity", "N/A", "", "", "Used for tSense (K70), K30, K33"
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"Relay status", "N/A", "", "", "Used for tSense (K70), K30, K33"
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"Temperature adjustment", "N/A", "", "", "Used for tSense (K70), K30, K33"
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"ABC period", "N/A", "", "", "Used for tSense (K70), K30, K33"
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.. note:: If you want to use the relative carbon dioxide percentage (2000ppm = 100% and 350ppm = 0%) you should use this
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:code:`100-(2000-%value%)/(2000-350)*100` as a formula. And instead of :code:`ppm` as value name you should use
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:code:`RCO2` (relative CO2) and 1 decimal.
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Rules examples
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--------------
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.. code-block:: html
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on CO2#Level do
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if [CO2#Level]>2000
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Publish,%sysname%/Alarm,CO2 level is too high!
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endif
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endon
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Commands available
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^^^^^^^^^^^^^^^^^^
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.. include:: P052_commands.repl
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Where to buy
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------------
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.. csv-table::
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:header: "Store", "Link"
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:widths: 5, 40
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"AliExpress","`Link 1 ($) <http://s.click.aliexpress.com/e/cg1fhDDI>`_"
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"Ebay","`Link 2 ($) <http://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5575404073&toolid=10001&campid=5338336929&customid=&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2FS8-0053-carbon-dioxide-infrared-CO2-sensors-FOR-SenseAir%2F112303432827%3Fhash%3Ditem1a25ce647b%3Ag%3A%7EHcAAOSw1WJZJ%7E8Y>`_"
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"First Byte","`Link 3 ($) <https://firstbyte.shop/products/s8>`_"
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|affiliate|
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More pictures
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-------------
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.. image:: P052_S8_2.jpg
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.. image:: P052_S8_3.jpg
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