Maker 101
Published © GPL3+

Make Your Hydroponics System Fully Automated and View Data V

This project shows how to control the hydroponic system as automation and how to monitor the desired data through applications.

IntermediateFull instructions provided851
Make Your Hydroponics System Fully Automated and View Data V

Things used in this project

Hardware components

Wemos D1 Mini ESP8266
×1

Software apps and online services

Arduino IDE
Arduino IDE
Altium Designer
Blynk
Blynk

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Solder Wire, Lead Free
Solder Wire, Lead Free

Story

Read more

Custom parts and enclosures

Bill of Materials

Schematics

Schematic

Code

Hydroponic_IoT_Monitoring.ino

Arduino
All in One Code
#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "YOUR_ID"
#define BLYNK_TEMPLATE_NAME "Hydroponic Home"
#define BLYNK_AUTH_TOKEN "YOUR_TOKEN"

#include <Servo.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

Servo phServo;

char ssid[] = "MAKER101IO";
char pass[] = "maker101.io";

#define PH_PIN A0
#define LVL_PIN 15
#define LVL_PWR 4
#define WATER_PUMP 12
#define SERVO_PIN 2

#define TIME_RANGE 60000
#define PUMP_TIME 3000

int pos = 170;

/*--------- pH Sensor ---------*/
unsigned long int avgValue;
float b;
int buf[10], temp;

int f;
float val;
char buff2[10];
String valueString = "";
String Value = "";

void PH_Value(){
  for (pos = 170; pos >= 10; pos -= 1) { // goes from 170 degrees to 10 degrees
    // in steps of 1 degree
    phServo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(10);                       // waits 15ms for the servo to reach the position
  }
  delay(2000);
  for(int i=0; i<10; i++){
    buf[i] = analogRead(PH_PIN);
    delay(10);
  }

  for(int i=0; i<9; i++){
    for(int j=i+1; j<10; j++){
      if(buf[i] > buf[j]){
        temp = buf[i];
        buf[i] = buf[j];
        buf[j] = temp;
      }
    }
  }
  avgValue=0;
  for(int i=2; i<8; i++)
  avgValue+=buf[i];
  float phValue = (float) avgValue * 3.3/1024/6;
  phValue = 3.5 * phValue;
  Value = dtostrf(phValue, 4, 2, buff2);
  Serial.print("pH Value: ");
  Serial.print(Value);
  Serial.println("");
  valueString = "";
  delay(500);

  Blynk.virtualWrite(V1, Value);
  delay(2000);

  for (pos = 10; pos <= 170; pos += 1) {    
    phServo.write(pos);
    delay(10);
  }
}

/*--------- Water Level Sensor ---------*/
void readWaterLevel(){
  digitalWrite(LVL_PWR, HIGH);
  delay(1000);
  int waterLevelVal = digitalRead(LVL_PIN);
  if(waterLevelVal == HIGH){
    Serial.print("Water Level: ");
    Serial.print(waterLevelVal);
    Blynk.virtualWrite(V2, "Water Level Good");
  }
  else {
    Blynk.virtualWrite(V2, "Need to Add Some Water");
  }
  delay(2000);
  digitalWrite(LVL_PWR, LOW);
}

/*--------- Water Pump ---------*/
void runWaterPump(){
  digitalWrite(WATER_PUMP, HIGH);
  Blynk.virtualWrite(V3, "Water Pump Started");
  Serial.print("Water Pump: ");
  Serial.print("HIGH");
  delay(PUMP_TIME);
  digitalWrite(WATER_PUMP, LOW);
  Blynk.virtualWrite(V3, "Water Pump Stopped");
  Serial.print("Water Pump: ");
  Serial.print("LOW");
}

/*--------- Time Range ---------*/
/* Define the time range for sensor measurements */
const int measurementInterval = TIME_RANGE;
/* Time variable to keep track of the time range */
unsigned long previousMillis = 0; 

void setup() {
  Serial.begin(9600);
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Wi-Fi connected: ");

  Blynk.config(BLYNK_AUTH_TOKEN);

  phServo.attach(SERVO_PIN);
  phServo.write(pos);

  pinMode(LVL_PIN, INPUT);
  pinMode(LVL_PWR, OUTPUT);
  pinMode(WATER_PUMP, OUTPUT);

  /* Initially keep the sensors and motor OFF */
  digitalWrite(LVL_PWR, LOW);
  digitalWrite(WATER_PUMP, LOW);
}

void loop() {
  // Run the Blynk app
  Blynk.run();

  /* Get current time. If the defined time range 
  has not passed, terminate the loop */
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis < measurementInterval) {
    return;
  }
  /* If the defined time range is complete, update the time */
  previousMillis = currentMillis;

  PH_Value();
  delay(2000);
  readWaterLevel();
  delay(2000);
  runWaterPump();
  delay(2000);
}

water-pump-test.ino

Arduino
Water Pump Test Code
#define WATER_PUMP 12   // D6 pin

/* Define how long the pump will run (5 seconds) */
#define PUMP_TIME 3000

void setup() {
  // put your setup code here, to run once:
  pinMode(WATER_PUMP, OUTPUT);
  digitalWrite(WATER_PUMP, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(WATER_PUMP, HIGH);
  delay(PUMP_TIME);
  digitalWrite(WATER_PUMP, LOW);
  delay(3000);
}

ph-sensor-test.ino

Arduino
pH Meter Sensor Test Code
#define PH_PIN A0    // A0 pin

unsigned long int avgValue;
float b;
int buf[10], temp;

int f;
float val;
char buff2[10];
String valueString = "";
String Value = "";

void PH_Value(){
  for(int i=0; i<10; i++){
    buf[i] = analogRead(PH_PIN);
    delay(10);
  }

  for(int i=0; i<9; i++){
    for(int j=i+1; j<10; j++){
      if(buf[i] > buf[j]){
        temp = buf[i];
        buf[i] = buf[j];
        buf[j] = temp;
      }
    }
  }
  avgValue=0;
  for(int i=2; i<8; i++)
  avgValue+=buf[i];
  float phValue = (float) avgValue * 3.3/1024/6;
  phValue = 3.5 * phValue;
  Value = dtostrf(phValue, 4, 2, buff2);
  Serial.print("pH Value: ");
  Serial.print(Value);
  Serial.println("");
  valueString = "";
  delay(1000);
}

void setup() {
  Serial.begin(9600);
  delay(2000);
}

void loop() {
  PH_Value();
}

water-level-test.ino

Arduino
Water Level Sensor Test Code
#define LVL_PIN 15  // D8 pin
#define LVL_PWR 4   // D2 pin

void readWaterLevel(){
  digitalWrite(LVL_PWR, HIGH);
  delay(100);
  int waterLevelVal = digitalRead(LVL_PIN);
  Serial.print("Water Level: ");
  Serial.print(waterLevelVal);
  Serial.println();
  delay(100);
  digitalWrite(LVL_PWR, LOW);
  delay(2000);
}

void setup() {
  Serial.begin(9600);
  pinMode(LVL_PIN, INPUT);
  pinMode(LVL_PWR, OUTPUT);
  digitalWrite(LVL_PWR, LOW);
}

void loop() {
  readWaterLevel();
}

Credits

Maker 101
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