A Cloud In TheSky

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===== Room control =====

Controlling the environment in a room can be tricky. Often it's based on an economic viewpoint.
I will try explaining different sensors and outputs and what I've seen used practically with good results.

I will try explaining "Best Practice" or "Ideas of best practice" below with increasing advancements.

==== Room control Heat ====

Simplest automation, is a room temperature sensor controlling room heating.
Heat setpoint at 23 °C, and when room temperature gets below this setpoint, you can start regulation your heat option.

==== Regulation types ====
Regulators can be a difficult subject that requires a comprehensive explaination.
For now I'll just explain 2 types.

=== Control curve ===

Control curves can be 2 points and upwards (Often no more then 10 points)
For heating, imagine 2 points in a curve, where X is the temperature below setpoint eg. 10 to 0 degrees below, and Y is a percentage from 100% to 0%. See the graph below.

<gchart 350x120 line left>
10=100%
0=0%
</gchart>



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=== PID Regulator ===

Please visit the [[bms:guides:pid|PID guide]] in guides section

==== Sensors explained ====

A sensor is basically anything inbound information, from temperature to light status.

<WRAP>
^Sensor type^Shortname EN^Shortname DK^Unit^Description^
^Temperature|RT|TR|°C or °f|Room temperature is the most basic sensor, used for controlling heating.|
^Carbon dioxide|Co2|Co2 or LK|ppm|Co2 is used to determine "air quality" or "the human influence" in the room.|
^Relative\\ Humidity|RH|RH|%RH|"Relative humidity" is the amount of water vapor present in air expressed as a percentage (%RH) of the amount needed to achieve saturation at the same temperature. Too low or high values have significant impact on air quality.|
^Pressence detection|PD|PIR|On or off |Pressence detection is often used with a motion detector, but could also be infrared sensors or an ultrasonic detection system (rare or in combination with motion detection).|
^Light level|LUX|LX or LUX|lx|Measurement of the illuminance of a surface (lx), used to regulate output of the lightsource.|
^Window sensor|WS|VK|Open or Closed|Windows sensor is typically a magnet switch, used to regulate air valves and temperature|
</WRAP>
<WRAP clear></WRAP>


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