Source code

#define relay_1 13

#define relay_2 12

#define relay_3 11

#define relay_4 10

#define relay_5 9

#define ideal 295

void setup() {

  pinMode(relay_1, OUTPUT);

  pinMode(relay_2, OUTPUT);  

  pinMode(relay_3, OUTPUT);

  pinMode(relay_4, OUTPUT);

  pinMode(relay_5, OUTPUT);

  Serial.begin(9600);

  digitalWrite(relay_1, LOW);

  digitalWrite(relay_2, LOW);

  digitalWrite(relay_3, LOW);

  digitalWrite(relay_4, LOW);

  digitalWrite(relay_5, LOW);

}

void loop() {

    int sensor_1=analogRead(A0);

    int sensor_2=analogRead(A1);

    int sensor_3=analogRead(A2);

    int sensor_4=analogRead(A3);

    int sensor_5=analogRead(A4);

    Serial.println("s1" + sensor_1);

    Serial.println("s2" + sensor_2);

    Serial.println("s3" + sensor_3);

    Serial.println("s4" + sensor_4);

    Serial.println("s5" + sensor_5);

    delay(100);

    if(sensor_1 < ideal)

    {

      digitalWrite(relay_1, LOW);

    }

    else

    {

      digitalWrite(relay_1, HIGH);

    }

    if(sensor_2 < ideal)

    {

      digitalWrite(relay_2, LOW);

    }

    else

    {

      digitalWrite(relay_2, HIGH);

    }

    if(sensor_3 < ideal)

    {

      digitalWrite(relay_3, LOW);

    }

    else

    {

      digitalWrite(relay_3, HIGH);

    }

    if(sensor_4 < ideal)

    {

      digitalWrite(relay_4, LOW);

    }

    else

    {

      digitalWrite(relay_4, HIGH);

    }

    if(sensor_5 < ideal)

    {

      digitalWrite(relay_5, LOW);

    }

    else

    {

      digitalWrite(relay_5, HIGH);

    }

}

Materials

Wire-management:

• Total number of wires: 13
  • Wire 1 (blue):
    • Moisture transducer (A0) → Arduino input (A0)
  • Wire 2 (black):
    • Moisture transducer (GND) → Arduino (GND)
  • Wire 3 (red):
    • Moisture transducer (VCC) → Arduino (3.3VDC)
  • Wire 4 (black):
    • Relay module (GND) → Arduino (GND)
  • Wire 5 (red):
    • Relay module (VCC) → Arduino (5VDC)
  • Wire 6 (yellow):
    • Relay module (module 2) → Arduino (pin 12)
  • Wire 7 (green):
    • Relay module (module 1) → Arduino (pin 13)
  • Wire 8 (orange):
    • Relay module (NO) → 12VDC Water pump (-)
  • Wire 9 (red)
    • 12VDC power adapter (+) → 12VDC Water pump (+)
  • Wire 10 (black)
    • Relay module - module 2 (COM) → Relay module - module 1 (COM)
  • Wire 11 (black)
    • Power adapter (-) → Relay module - module 1 (COM)
  • Wire 12 (orange)
    • Relay module (NO) → 12VDC Solenoid valve (-)
  • Wire 13 (red)
    • 12VDC power adapter (+) → 12VDC Solenoid valve (+)

Power supply:

• Source: Power adapter AC-DC
• Input voltage: 100-240VAC
• Output voltage: 12VDC
• Maximum output current: 1A
• Quantity: 1

Arduino:

• Maximum input voltage: 12VDC.
• Type: Arduino UNO
• Analog in/out: 6/0
• Quantity: 1

Moisture sensors:

• Acceptable voltages: 3.3VDC - 5VDC
• PCB size: 3.2 x 1.4 cm
• Moisture sensor transducer (amplifier)
• Moisture sensor module
• Quantity of sensor: 1
• Quantity of transducer: 1

Water pumping system:

• Voltage consumption: 12VDC
• Capacity: 5W
• Flow rate: 5.2 ml/min - 90 ml/min
• Material of duct: Silicon
• Type: three wheel drive
• Weight: 110g
• Quantity: 1

Valves:

• Supply voltage: 12VDC
• Color: White
• Tube diameter: ½ “ (inch)
• Quantity: 1

Relay Module:

• # Modules: 8
• Voltage: 12VDC
• Current consumption: 200mA/relay
• Signal: High (12VDC) -- Low (0VDC)
• Relay on circuit:
  • Power supply: 12VDC
  • Max switching contact: 250VAC - 10A or 30VDC - 10A
• Size:
  • 72 (l) x 55 (w) x 19 (h) mm
• Quantity: 1