This is a lil arduino program to turn a coffee machine into a device that takes care of plants

• A Cheap mositure sensor
• LED lighting
• I2C OLED 0.96'' screen
• 3 Relays
• Arduino board (I used nano)

Connect the relays to:

• The water pump
• The growing lights
• And the moisture sensor

• It uses Switch_lib to control relays and Adafruit library for the 0.96'' OLED ( You'll need to have it downloaded on the Arduino library manager. )

• Adapt the PIN definition to your needs:

// ANALOG INPUTS  PIN DEFINITION//

int moisture_sensor = A2;

// DIGITAL INPUTS  PIN DEFINITION//

int lights_p = 11;  // Lights relay
int r1_p = 10;      // R1 relay
int r2_p = 9;       // R2 relay
int moisture_p = 8; // Hsensor relay

• Conect the OLED screen to the I2C ports. In my Arduino nano were A4 and A5

Once all connected, during the setup the program will do some test as follow:

• Turn on the Screen
• Turn ON/OFF the lights
• Turn ON/OFF the pump
• Get first sensor read

If all of this goes well the program will start to work.

more information.