Arduino-humidity

A school project to read the humidity and act on that data with an arduino. The code is found in the file arduino-humidify.ino, so this folder can be imported directly into the arduino IDE.

What it exactly does

• It reads the temperature and humidity with a DHT_11 module.
• Two times per minute it checks the humidity.
  • If it's below 40%, the humidifier is activated
  • If it's above 55%, the dehumidifier is activated
• Every 15 seconds, the arduino prints the temperature, humidity and time in the serial monitor.
  • It includes tabs so you can copy-paste the result directly into excel.
• It shows the temperature, humidity and status to the LCD screen
  • When the status changes, the backlight binks a couple times

Components

This project uses the DHT_11 and LCD (16x2) module. The humidifier and dehumidifier are custom build and controlled by a relay.

Schematic

Pinout

• DHT_11 Sensor: Digital 2
• Dehumidifier relay: Digital 4
• Humidifier relay: Digital 5
• LCD Backlight: Digital 8
• LCD sda: Analog 4
• LCD scl: Analog 5

And of course, the vcc and ground.

Pictures

Overview	User interface

Dehumidifier	Humidifier

License

This project is licensed under MIT, so feel free to use, modify, etc the code however you want!