Automatic Watering System for My Plants

When the soil is dry, Arduino will command the water pump to run. Our plant is absolutely cheerful anytime!

Nov 11, 2020

•

176177 views

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30 respects

watering

plants

garden

Components and supplies

Ultrasonic Sensor - HC-SR04 (Generic)

Water pump

OLED Character Display Module 16 x 2 Green

Solderless Breadboard Full Size

piezo speaker

Resistor 330 ohm

Arduino UNO

Relay Module (Generic)

BME280/BMP280

Gravity: Analog Soil Moisture Sensor For Arduino

LED (generic)

Dual bidirectional I2C-bus and SMBus voltage-level translator(PCA9306)

Apps and platforms

Arduino IDE

Project description

Code

AutoWatering.ino

c_cpp

It says a lot, but I'm just measuring the soil humidity and watering it. It's so easy!

1#include <Wire.h>
2//BME280
3#include <Adafruit_BME280.h>
4//OLED
5#include  <I2CLiquidCrystal.h>
6
7//------------------------------
8
9//BME280
10#define  I2C_SCL 5
11#define I2C_SDA 4
12Adafruit_BME280 bme;
13
14//OLED
15#define  I2C_ADDR 0x3c
16#define BRIGHT 127
17I2CLiquidCrystal oled(I2C_ADDR, (uint8_t)BRIGHT);
18
19//Music
20#define  BEAT 300
21#define PIN 10
22
23#define DO 262
24#define RE 294
25#define MI  330
26#define FA 349
27#define SO 392
28#define RA 440
29#define SI 494
30#define  HDO 523
31
32//----------------------
33
34//Timer
35int counter = 0;
36
37//Ultrasonic  Sensor
38int Trig = 8;
39int Echo = 9;
40int Duration;
41float Distance;
42
43//LED
44int  led = 7;
45
46//misture sensor
47int water_count = 0;
48
49//relay
50int relay  = 13;
51
52void setup() {
53  //BME280
54  Serial.begin(9600);
55  Wire.begin();
56  if (!bme.begin(0x76)) {
57      Serial.println("Could not find a valid BME280  sensor, check wiring!");
58      while (1);
59  }
60  delay(100);
61
62  //OLED
63  oled.begin(16, 2);
64  oled.display();
65  oled.clear();
66  oled.noBlink();
67  oled.noCursor();
68  oled.home();
69  oled.print("Wait a minutes.");
70
71  //Ultrasonic Sensor
72  pinMode(Trig,OUTPUT);
73  pinMode(Echo,INPUT);
74
75  //LED
76  pinMode(led,OUTPUT);
77
78  //relay
79  pinMode(relay, OUTPUT);
80}
81
82void  loop() {
83  
84  //Check temperature, humidity, and soil humidity once a minute.
85  if(counter == 1){
86    ckeckBME280();
87    checkWater();
88    checkMoisture();
89  }
90
91  delay(10000);//10sec
92  counter++;
93  
94  if(counter >= 6){
95    counter = 0;
96  }
97
98  checkWater();
99}
100
101//BME280
102void ckeckBME280(){
103  // Get data from BME280 sensor
104  float t = bme.readTemperature();       //  C
105  float h = bme.readHumidity();          // %
106  float p = bme.readPressure()  / 100.0F; // hPa
107  Serial.print("Temperature:");
108  Serial.println(t);
109  Serial.print("Humidity:");
110  Serial.println(h);
111  Serial.print("Pressure:");
112  Serial.println(p);
113  Serial.println();
114
115  oled.setCursor(0, 0);
116  oled.print(String(t)+"C  ");
117  oled.print(String(h)+"%    ");
118}
119
120//Ultrasonic Sensor
121void  checkWater(){
122  //Check the water level in the bucket.
123  digitalWrite(Trig,LOW);
124  delayMicroseconds(1);
125  digitalWrite(Trig,HIGH);
126  delayMicroseconds(11);
127  digitalWrite(Trig,LOW);
128  Duration = pulseIn(Echo,HIGH);
129  
130  if (Duration>0)  {
131    Distance = Duration/2;
132    Distance = Distance*340*100/1000000; // ultrasonic  speed is 340m/s = 34000cm/s = 0.034cm/us 
133    Serial.print(Distance);
134    Serial.println("  cm");
135    
136    if(Distance > 12){
137      digitalWrite(led, HIGH);
138    }else{
139      digitalWrite(led, LOW);
140    }
141    
142  }
143}
144
145//moisture sensor
146void  checkMoisture(){
147  //Measure soil humidity
148  int moisture = analogRead(A0);
149  Serial.print("Moisture Sensor Value:");
150  Serial.println(moisture);
151  oled.setCursor(0,  1);
152  oled.print("Moisture: " + String(moisture) + "   ");
153  
154  if(moisture  <= 300){
155    water_count++;
156    if(water_count == 5){//To wait for the water  to go through the pot.
157      watering();
158      water_count = 0;
159    }
160  }
161}
162
163
164//Watering
165void watering(){
166  digitalWrite(relay, HIGH);
167  delay(2000);
168  digitalWrite(relay, LOW);
169  delay(8000);
170  completeWatering();
171  counter++; 
172}
173
174//Music
175void completeWatering(){
176  //Let them know  that watering is complete.
177  oled.setCursor(0, 0);
178  oled.print("   Thank  you!   ");
179  oled.setCursor(0, 1);
180  oled.print("   (^ O ^)/     ");
181  
182      tone(PIN,DO,BEAT) ; // C
183      delay(BEAT) ;
184      tone(PIN,RE,BEAT)  ; // D
185      delay(BEAT) ;
186      tone(PIN,MI,1200) ; // E
187      delay(BEAT)  ;
188      delay(BEAT) ;
189      delay(BEAT) ;
190      tone(PIN,RE,BEAT) ; //  D
191      delay(BEAT) ;
192      tone(PIN,DO,BEAT) ; // C
193      delay(BEAT)  ;
194      delay(BEAT) ;
195      tone(PIN,DO,BEAT) ; // C
196      delay(BEAT)  ;
197      tone(PIN,RE,BEAT) ; // D
198      delay(BEAT) ;
199      tone(PIN,MI,BEAT)  ; // E
200      delay(BEAT) ;
201      tone(PIN,RE,BEAT) ; // D
202      delay(BEAT)  ;
203      tone(PIN,DO,BEAT) ; // C
204      delay(BEAT) ;
205      tone(PIN,RE,1200)  ; // D
206      delay(BEAT) ;
207      delay(BEAT) ;
208  delay(4400);
209      
210  counter++;
211  oled.setCursor(0, 0);
212  oled.print("                  ");
213  oled.setCursor(0, 1);
214  oled.print("                  ");
215  ckeckBME280();
216  int moisture = analogRead(A0);
217  oled.setCursor(0, 1);
218  oled.print("Moisture:  " + String(moisture) + "   ");
219}
220

#include <Wire.h>
//BME280
#include <Adafruit_BME280.h>
//OLED
#include  <I2CLiquidCrystal.h>

//------------------------------

//BME280
#define  I2C_SCL 5
#define I2C_SDA 4
Adafruit_BME280 bme;

//OLED
#define  I2C_ADDR 0x3c
#define BRIGHT 127
I2CLiquidCrystal oled(I2C_ADDR, (uint8_t)BRIGHT);

//Music
#define  BEAT 300
#define PIN 10

#define DO 262
#define RE 294
#define MI  330
#define FA 349
#define SO 392
#define RA 440
#define SI 494
#define  HDO 523

//----------------------

//Timer
int counter = 0;

//Ultrasonic  Sensor
int Trig = 8;
int Echo = 9;
int Duration;
float Distance;

//LED
int  led = 7;

//misture sensor
int water_count = 0;

//relay
int relay  = 13;

void setup() {
  //BME280
  Serial.begin(9600);
  Wire.begin();
  if (!bme.begin(0x76)) {
      Serial.println("Could not find a valid BME280  sensor, check wiring!");
      while (1);
  }
  delay(100);

  //OLED
  oled.begin(16, 2);
  oled.display();
  oled.clear();
  oled.noBlink();
  oled.noCursor();
  oled.home();
  oled.print("Wait a minutes.");

  //Ultrasonic Sensor
  pinMode(Trig,OUTPUT);
  pinMode(Echo,INPUT);

  //LED
  pinMode(led,OUTPUT);

  //relay
  pinMode(relay, OUTPUT);
}

void  loop() {
  
  //Check temperature, humidity, and soil humidity once a minute.
  if(counter == 1){
    ckeckBME280();
    checkWater();
    checkMoisture();
  }

  delay(10000);//10sec
  counter++;
  
  if(counter >= 6){
    counter = 0;
  }

  checkWater();
}

//BME280
void ckeckBME280(){
  // Get data from BME280 sensor
  float t = bme.readTemperature();       //  C
  float h = bme.readHumidity();          // %
  float p = bme.readPressure()  / 100.0F; // hPa
  Serial.print("Temperature:");
  Serial.println(t);
  Serial.print("Humidity:");
  Serial.println(h);
  Serial.print("Pressure:");
  Serial.println(p);
  Serial.println();

  oled.setCursor(0, 0);
  oled.print(String(t)+"C  ");
  oled.print(String(h)+"%    ");
}

//Ultrasonic Sensor
void  checkWater(){
  //Check the water level in the bucket.
  digitalWrite(Trig,LOW);
  delayMicroseconds(1);
  digitalWrite(Trig,HIGH);
  delayMicroseconds(11);
  digitalWrite(Trig,LOW);
  Duration = pulseIn(Echo,HIGH);
  
  if (Duration>0)  {
    Distance = Duration/2;
    Distance = Distance*340*100/1000000; // ultrasonic  speed is 340m/s = 34000cm/s = 0.034cm/us 
    Serial.print(Distance);
    Serial.println("  cm");
    
    if(Distance > 12){
      digitalWrite(led, HIGH);
    }else{
      digitalWrite(led, LOW);
    }
    
  }
}

//moisture sensor
void  checkMoisture(){
  //Measure soil humidity
  int moisture = analogRead(A0);
  Serial.print("Moisture Sensor Value:");
  Serial.println(moisture);
  oled.setCursor(0,  1);
  oled.print("Moisture: " + String(moisture) + "   ");
  
  if(moisture  <= 300){
    water_count++;
    if(water_count == 5){//To wait for the water  to go through the pot.
      watering();
      water_count = 0;
    }
  }
}


//Watering
void watering(){
  digitalWrite(relay, HIGH);
  delay(2000);
  digitalWrite(relay, LOW);
  delay(8000);
  completeWatering();
  counter++; 
}

//Music
void completeWatering(){
  //Let them know  that watering is complete.
  oled.setCursor(0, 0);
  oled.print("   Thank  you!   ");
  oled.setCursor(0, 1);
  oled.print("   (^ O ^)/     ");
  
      tone(PIN,DO,BEAT) ; // C
      delay(BEAT) ;
      tone(PIN,RE,BEAT)  ; // D
      delay(BEAT) ;
      tone(PIN,MI,1200) ; // E
      delay(BEAT)  ;
      delay(BEAT) ;
      delay(BEAT) ;
      tone(PIN,RE,BEAT) ; //  D
      delay(BEAT) ;
      tone(PIN,DO,BEAT) ; // C
      delay(BEAT)  ;
      delay(BEAT) ;
      tone(PIN,DO,BEAT) ; // C
      delay(BEAT)  ;
      tone(PIN,RE,BEAT) ; // D
      delay(BEAT) ;
      tone(PIN,MI,BEAT)  ; // E
      delay(BEAT) ;
      tone(PIN,RE,BEAT) ; // D
      delay(BEAT)  ;
      tone(PIN,DO,BEAT) ; // C
      delay(BEAT) ;
      tone(PIN,RE,1200)  ; // D
      delay(BEAT) ;
      delay(BEAT) ;
  delay(4400);
      
  counter++;
  oled.setCursor(0, 0);
  oled.print("                  ");
  oled.setCursor(0, 1);
  oled.print("                  ");
  ckeckBME280();
  int moisture = analogRead(A0);
  oled.setCursor(0, 1);
  oled.print("Moisture:  " + String(moisture) + "   ");
}

AutoWatering.ino

c_cpp

It says a lot, but I'm just measuring the soil humidity and watering it. It's so easy!

1#include <Wire.h>
2//BME280
3#include <Adafruit_BME280.h>
4//OLED
5#include
6  <I2CLiquidCrystal.h>
7
8//------------------------------
9
10//BME280
11#define
12  I2C_SCL 5
13#define I2C_SDA 4
14Adafruit_BME280 bme;
15
16//OLED
17#define
18  I2C_ADDR 0x3c
19#define BRIGHT 127
20I2CLiquidCrystal oled(I2C_ADDR, (uint8_t)BRIGHT);
21
22//Music
23#define
24  BEAT 300
25#define PIN 10
26
27#define DO 262
28#define RE 294
29#define MI
30  330
31#define FA 349
32#define SO 392
33#define RA 440
34#define SI 494
35#define
36  HDO 523
37
38//----------------------
39
40//Timer
41int counter = 0;
42
43//Ultrasonic
44  Sensor
45int Trig = 8;
46int Echo = 9;
47int Duration;
48float Distance;
49
50//LED
51int
52  led = 7;
53
54//misture sensor
55int water_count = 0;
56
57//relay
58int relay
59  = 13;
60
61void setup() {
62  //BME280
63  Serial.begin(9600);
64  Wire.begin();
65
66  if (!bme.begin(0x76)) {
67      Serial.println("Could not find a valid BME280
68  sensor, check wiring!");
69      while (1);
70  }
71  delay(100);
72
73  //OLED
74
75  oled.begin(16, 2);
76  oled.display();
77  oled.clear();
78  oled.noBlink();
79
80  oled.noCursor();
81  oled.home();
82  oled.print("Wait a minutes.");
83
84
85  //Ultrasonic Sensor
86  pinMode(Trig,OUTPUT);
87  pinMode(Echo,INPUT);
88
89
90  //LED
91  pinMode(led,OUTPUT);
92
93  //relay
94  pinMode(relay, OUTPUT);
95}
96
97void
98  loop() {
99  
100  //Check temperature, humidity, and soil humidity once a minute.
101
102  if(counter == 1){
103    ckeckBME280();
104    checkWater();
105    checkMoisture();
106
107  }
108
109  delay(10000);//10sec
110  counter++;
111  
112  if(counter >= 6){
113
114    counter = 0;
115  }
116
117  checkWater();
118}
119
120//BME280
121void ckeckBME280(){
122
123  // Get data from BME280 sensor
124  float t = bme.readTemperature();       //
125  C
126  float h = bme.readHumidity();          // %
127  float p = bme.readPressure()
128  / 100.0F; // hPa
129  Serial.print("Temperature:");
130  Serial.println(t);
131
132  Serial.print("Humidity:");
133  Serial.println(h);
134  Serial.print("Pressure:");
135
136  Serial.println(p);
137  Serial.println();
138
139  oled.setCursor(0, 0);
140  oled.print(String(t)+"C
141  ");
142  oled.print(String(h)+"%    ");
143}
144
145//Ultrasonic Sensor
146void
147  checkWater(){
148  //Check the water level in the bucket.
149  digitalWrite(Trig,LOW);
150
151  delayMicroseconds(1);
152  digitalWrite(Trig,HIGH);
153  delayMicroseconds(11);
154
155  digitalWrite(Trig,LOW);
156  Duration = pulseIn(Echo,HIGH);
157  
158  if (Duration>0)
159  {
160    Distance = Duration/2;
161    Distance = Distance*340*100/1000000; // ultrasonic
162  speed is 340m/s = 34000cm/s = 0.034cm/us 
163    Serial.print(Distance);
164    Serial.println("
165  cm");
166    
167    if(Distance > 12){
168      digitalWrite(led, HIGH);
169    }else{
170
171      digitalWrite(led, LOW);
172    }
173    
174  }
175}
176
177//moisture sensor
178void
179  checkMoisture(){
180  //Measure soil humidity
181  int moisture = analogRead(A0);
182
183  Serial.print("Moisture Sensor Value:");
184  Serial.println(moisture);
185  oled.setCursor(0,
186  1);
187  oled.print("Moisture: " + String(moisture) + "   ");
188  
189  if(moisture
190  <= 300){
191    water_count++;
192    if(water_count == 5){//To wait for the water
193  to go through the pot.
194      watering();
195      water_count = 0;
196    }
197
198  }
199}
200
201
202//Watering
203void watering(){
204  digitalWrite(relay, HIGH);
205
206  delay(2000);
207  digitalWrite(relay, LOW);
208  delay(8000);
209  completeWatering();
210
211  counter++; 
212}
213
214//Music
215void completeWatering(){
216  //Let them know
217  that watering is complete.
218  oled.setCursor(0, 0);
219  oled.print("   Thank
220  you!   ");
221  oled.setCursor(0, 1);
222  oled.print("   (^ O ^)/     ");
223
224  
225      tone(PIN,DO,BEAT) ; // C
226      delay(BEAT) ;
227      tone(PIN,RE,BEAT)
228  ; // D
229      delay(BEAT) ;
230      tone(PIN,MI,1200) ; // E
231      delay(BEAT)
232  ;
233      delay(BEAT) ;
234      delay(BEAT) ;
235      tone(PIN,RE,BEAT) ; //
236  D
237      delay(BEAT) ;
238      tone(PIN,DO,BEAT) ; // C
239      delay(BEAT)
240  ;
241      delay(BEAT) ;
242      tone(PIN,DO,BEAT) ; // C
243      delay(BEAT)
244  ;
245      tone(PIN,RE,BEAT) ; // D
246      delay(BEAT) ;
247      tone(PIN,MI,BEAT)
248  ; // E
249      delay(BEAT) ;
250      tone(PIN,RE,BEAT) ; // D
251      delay(BEAT)
252  ;
253      tone(PIN,DO,BEAT) ; // C
254      delay(BEAT) ;
255      tone(PIN,RE,1200)
256  ; // D
257      delay(BEAT) ;
258      delay(BEAT) ;
259  delay(4400);
260      
261
262  counter++;
263  oled.setCursor(0, 0);
264  oled.print("                  ");
265
266  oled.setCursor(0, 1);
267  oled.print("                  ");
268  ckeckBME280();
269
270  int moisture = analogRead(A0);
271  oled.setCursor(0, 1);
272  oled.print("Moisture:
273  " + String(moisture) + "   ");
274}
275

#include <Wire.h>
//BME280
#include <Adafruit_BME280.h>
//OLED
#include
  <I2CLiquidCrystal.h>

//------------------------------

//BME280
#define
  I2C_SCL 5
#define I2C_SDA 4
Adafruit_BME280 bme;

//OLED
#define
  I2C_ADDR 0x3c
#define BRIGHT 127
I2CLiquidCrystal oled(I2C_ADDR, (uint8_t)BRIGHT);

//Music
#define
  BEAT 300
#define PIN 10

#define DO 262
#define RE 294
#define MI
  330
#define FA 349
#define SO 392
#define RA 440
#define SI 494
#define
  HDO 523

//----------------------

//Timer
int counter = 0;

//Ultrasonic
  Sensor
int Trig = 8;
int Echo = 9;
int Duration;
float Distance;

//LED
int
  led = 7;

//misture sensor
int water_count = 0;

//relay
int relay
  = 13;

void setup() {
  //BME280
  Serial.begin(9600);
  Wire.begin();

  if (!bme.begin(0x76)) {
      Serial.println("Could not find a valid BME280
  sensor, check wiring!");
      while (1);
  }
  delay(100);

  //OLED

  oled.begin(16, 2);
  oled.display();
  oled.clear();
  oled.noBlink();

  oled.noCursor();
  oled.home();
  oled.print("Wait a minutes.");


  //Ultrasonic Sensor
  pinMode(Trig,OUTPUT);
  pinMode(Echo,INPUT);


  //LED
  pinMode(led,OUTPUT);

  //relay
  pinMode(relay, OUTPUT);
}

void
  loop() {
  
  //Check temperature, humidity, and soil humidity once a minute.

  if(counter == 1){
    ckeckBME280();
    checkWater();
    checkMoisture();

  }

  delay(10000);//10sec
  counter++;
  
  if(counter >= 6){

    counter = 0;
  }

  checkWater();
}

//BME280
void ckeckBME280(){

  // Get data from BME280 sensor
  float t = bme.readTemperature();       //
  C
  float h = bme.readHumidity();          // %
  float p = bme.readPressure()
  / 100.0F; // hPa
  Serial.print("Temperature:");
  Serial.println(t);

  Serial.print("Humidity:");
  Serial.println(h);
  Serial.print("Pressure:");

  Serial.println(p);
  Serial.println();

  oled.setCursor(0, 0);
  oled.print(String(t)+"C
  ");
  oled.print(String(h)+"%    ");
}

//Ultrasonic Sensor
void
  checkWater(){
  //Check the water level in the bucket.
  digitalWrite(Trig,LOW);

  delayMicroseconds(1);
  digitalWrite(Trig,HIGH);
  delayMicroseconds(11);

  digitalWrite(Trig,LOW);
  Duration = pulseIn(Echo,HIGH);
  
  if (Duration>0)
  {
    Distance = Duration/2;
    Distance = Distance*340*100/1000000; // ultrasonic
  speed is 340m/s = 34000cm/s = 0.034cm/us 
    Serial.print(Distance);
    Serial.println("
  cm");
    
    if(Distance > 12){
      digitalWrite(led, HIGH);
    }else{

      digitalWrite(led, LOW);
    }
    
  }
}

//moisture sensor
void
  checkMoisture(){
  //Measure soil humidity
  int moisture = analogRead(A0);

  Serial.print("Moisture Sensor Value:");
  Serial.println(moisture);
  oled.setCursor(0,
  1);
  oled.print("Moisture: " + String(moisture) + "   ");
  
  if(moisture
  <= 300){
    water_count++;
    if(water_count == 5){//To wait for the water
  to go through the pot.
      watering();
      water_count = 0;
    }

  }
}


//Watering
void watering(){
  digitalWrite(relay, HIGH);

  delay(2000);
  digitalWrite(relay, LOW);
  delay(8000);
  completeWatering();

  counter++; 
}

//Music
void completeWatering(){
  //Let them know
  that watering is complete.
  oled.setCursor(0, 0);
  oled.print("   Thank
  you!   ");
  oled.setCursor(0, 1);
  oled.print("   (^ O ^)/     ");

  
      tone(PIN,DO,BEAT) ; // C
      delay(BEAT) ;
      tone(PIN,RE,BEAT)
  ; // D
      delay(BEAT) ;
      tone(PIN,MI,1200) ; // E
      delay(BEAT)
  ;
      delay(BEAT) ;
      delay(BEAT) ;
      tone(PIN,RE,BEAT) ; //
  D
      delay(BEAT) ;
      tone(PIN,DO,BEAT) ; // C
      delay(BEAT)
  ;
      delay(BEAT) ;
      tone(PIN,DO,BEAT) ; // C
      delay(BEAT)
  ;
      tone(PIN,RE,BEAT) ; // D
      delay(BEAT) ;
      tone(PIN,MI,BEAT)
  ; // E
      delay(BEAT) ;
      tone(PIN,RE,BEAT) ; // D
      delay(BEAT)
  ;
      tone(PIN,DO,BEAT) ; // C
      delay(BEAT) ;
      tone(PIN,RE,1200)
  ; // D
      delay(BEAT) ;
      delay(BEAT) ;
  delay(4400);
      

  counter++;
  oled.setCursor(0, 0);
  oled.print("                  ");

  oled.setCursor(0, 1);
  oled.print("                  ");
  ckeckBME280();

  int moisture = analogRead(A0);
  oled.setCursor(0, 1);
  oled.print("Moisture:
  " + String(moisture) + "   ");
}

Downloadable files

Step3

Step3. Temperature, humidity and soil moisture are measured and displayed on the OLED.

Step3

Step2

Step2. An LED tells us when the bucket is empty.

Step2

Step2. An LED tells us when the bucket is empty.

Step2

Step3

Step3. Temperature, humidity and soil moisture are measured and displayed on the OLED.

Step3

Step1

Step1. Measure the soil moisture and water with a pump if the soil is dry.

Step1

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