Process

The goal of this device is to detect the humidity level and using light to notify users when the level reach a certain number. When the level reach 30, the LED will light up; When it is lower than 30, the light will turn off.

First step: 

I connected the photon with a DHT22 humidity sensor.

Second step: 

Inserted a switch so I can turn on and off the sensor.

Third step: 

Installed the LED light and input the code so it will react to the number produced by the sensor.

The challenge I have found was to make the LED light works. I have to change the code and input some of the serious to make the light turn on and off when the number goes up and down.

Billing of parts:

Photon: $19.00

Humidity Sensor: $9.95

LED: $0.5

BreadBoard: $5.00

Jumper Wire: $1.95

Power Switch: $1.50