DIY IoT Plant Watering System using Arduino

1/*************************************************************
2  Blynk is a platform with iOS and Android apps to control
3  ESP32, Arduino, Raspberry Pi and the likes over the Internet.
4  You can easily build mobile and web interfaces for any
5  projects by simply dragging and dropping widgets.
6
7    Downloads, docs, tutorials: https://www.blynk.io
8    Sketch generator:           https://examples.blynk.cc
9    Blynk community:            https://community.blynk.cc
10    Follow us:                  https://www.fb.com/blynkapp
11                                https://twitter.com/blynk_app
12
13  Blynk library is licensed under MIT license
14  This example code is in public domain.
15
16 *************************************************************
17  This example shows how to use Arduino WiFi shield
18  to connect your project to Blynk.
19
20  Please update your shield firmware:
21    https://www.arduino.cc/en/Hacking/WiFiShieldFirmwareUpgrading
22
23  Feel free to apply it to any other example. It's simple!
24 *************************************************************/
25
26/* Comment this out to disable prints and save space */
27//#define BLYNK_PRINT Serial
28
29/* Fill in information from Blynk Device Info here */
30#define BLYNK_TEMPLATE_ID "XXXXXXXXXXXX"
31#define BLYNK_TEMPLATE_NAME "XXXXXXXXXXXXX"
32#define BLYNK_AUTH_TOKEN "XXXXXXXXXXXXXXX"
33
34#include <SPI.h>
35#include <WiFiS3.h>
36#include <BlynkSimpleWifi.h>
37#include "Arduino_LED_Matrix.h"
38#include <EEPROM.h>
39
40#define moisture_sensor A0
41#define relay 7
42
43BlynkTimer timer;
44ArduinoLEDMatrix matrix;  //Create an led matrix object
45
46// Your WiFi credentials.
47// Set password to "" for open networks.
48char ssid[] = "XXXXXXXXX";
49char pass[] = "XXXXXXXXX";
50
51int eeprom_addr = 0;  //eeprom address
52int sensorValue = 0;  // variable to store the value coming from the sensor
53int prev_pump_status = 0;
54int pump_status = 0;
55float moist_percent = 0.00;
56
57
58
59const uint32_t HAPPY_LED[] = {
60    0x3fc48a95,
61    0x58019fd9,
62    0x5889871
63};
64
65const uint32_t NORMAL_LED[] = {
66    0x3fc40298,
67    0xd98d8019,
68    0x5889871
69};
70
71const uint32_t SAD_LED[] = {
72    0x3fc48a9d,
73    0xd8898018,
74    0x71889905
75};
76
77
78BLYNK_WRITE(V1){     //read data from Blynk cloud
79  pump_status = param.asInt();
80  EEPROM.write(eeprom_addr,pump_status);
81  prev_pump_status = EEPROM.read(eeprom_addr);
82  Serial.println(prev_pump_status);
83  Serial.println(pump_status);
84}
85
86void sendSensor(){   //send data to Blynk cloud
87  Blynk.virtualWrite(V0,moist_percent);
88}
89
90void init_renesas_MCU_IO(){
91  pinMode(relay, OUTPUT);
92  pinMode(moisture_sensor, INPUT);
93  analogReadResolution(12); //change to 12-bit resolution
94  matrix.begin(); //initialise the led matrix*/
95}
96
97void track_soil_moisture(){
98  
99  // read the value from the sensor:
100   sensorValue = analogRead(moisture_sensor);
101   moist_percent = 100 - ((float)sensorValue / 4096.0) * 100;
102   
103  if(moist_percent >= 0 && moist_percent < 33.33){
104    Serial.println("DRY");
105    matrix.loadFrame(SAD_LED);
106  }
107  else if(moist_percent >= 33.33 && moist_percent < 66.66){
108    Serial.println("MODERATE");
109    matrix.loadFrame(NORMAL_LED);
110  }
111  else if(moist_percent >= 66.66 && moist_percent <= 100){
112    Serial.println("WET");
113    matrix.loadFrame(HAPPY_LED);
114  }
115}
116
117void setup()
118{
119  // Debug console
120  Serial.begin(9600);
121
122  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
123
124  init_renesas_MCU_IO();
125 
126  timer.setInterval(1000L,sendSensor);
127
128  prev_pump_status = EEPROM.read(eeprom_addr);
129  pump_status = prev_pump_status;
130}
131
132void loop()
133{
134  Blynk.run();
135  timer.run();
136  
137  track_soil_moisture();
138  if(pump_status == 0){
139    Serial.println("Water pump is off");
140    digitalWrite(relay, LOW);
141  }
142  else if(pump_status == 1){
143    Serial.println("Water pump is on");
144    digitalWrite(relay,HIGH);
145  }
146  delay(500);
147}