README.md

CellarClimateController

Arduino project to control the climate a cellar (e.g. in the loundry room)

##Required arduino libraries

• [https://github.com/adafruit/Adafruit-RGB-LCD-Shield-Library]

• [https://github.com/adafruit/Adafruit_Sensor]

• [https://github.com/adafruit/DHT-sensor-library]

##Required Hardware:

• Arduino Uno R3 (Atmega328)
  [https://www.adafruit.com/product/50 ]

• LCD Shield Kit w/ 16x2 Character Display (I2C)
  [https://www.adafruit.com/products/772]

• 2 x DHT22 temperature-humidity sensor
  [https://www.adafruit.com/products/385]

• Fan e.g. like Papst 4412F/2 GLL
  [https://www.brack.ch/papst-gehaeuseluefter-4412f2-17333]

• Any 12V 2A powersupply

• Some resistors to connect all the sensors/fans to the arduino.

• A relais or a some FETs to switch on/off the FAN

##Precondition for the building (cellar) itself

• A hole in the building hull that allows fresh air to be ventilated in by the fan
• a second hole in the building hull that allows the humid air to go out

##Connections

• DHT22 (inside) signal on digital pin 2 (INPUT)
• DHT22 (outside) signal on digital pin 4 (INPUT)
• FAN rmp with 10k pullup on digital pin 3 (INPUT)
• FAN on/off on digital pin 8 (OUTPUT)
• Vin measurement with voltage divider (20k / 50k) on analog pin A0 (INPUT)