IoT based Smart Irrigation System using Soil Moisture Sensor

IoT based Smart Irrigation System using Soil Moisture Sensor 

Components Required

• NodeMCU ESP8266
• Arduino Uno
• Soil Moisture Sensor Module
• Water Pump Module
• Relay Module
• DHT11

Circuit Diagram

Code

//prateek //www.prateeks.in #define BLYNK_PRINT Serial #include <ESP8266WiFi.h> #include <BlynkSimpleEsp8266.h> WidgetLED PUMP(V0); #include "DHT.h" #include <SimpleTimer.h> #define DHTPIN 4 // pin DATA with D4 #define SOIL_MOIST_1_PIN A0 // pin A0 with A0 #define PUMP_PIN 13 // PUMP RELAY #define DHTTYPE DHT11 #define DRY_SOIL 68 #define WET_SOIL 90 #define TIME_PUMP_ON 15 #define READ_SOIL_HUM_TM 10L #define READ_AIR_DATA_TM 2L #define SEND_UP_DATA_TM 10L #define AUTO_CTRL_TM 60L char auth[] = "Blynk token"; char ssid[] = "wifi name"; char pass[] = "wifi password"; float humDHT = 0; float tempDHT = 0; int soilMoist = 0; boolean pumpStatus = 0; int timePumpOn = 1; long sampleTimingSeconds = 20; long startTiming = 0; long elapsedTime = 0; SimpleTimer timer; DHT dht(DHTPIN, DHTTYPE); void setup() { pinMode(PUMP_PIN, OUTPUT); aplyCmd(); Serial.begin(115200); dht.begin(); Blynk.begin( auth, ssid , pass ); PUMP.off(); startTimers(); } void loop() { timer.run(); Blynk.run(); } BLYNK_WRITE(3) { int i = param.asInt(); if (i == 1) { pumpStatus = !pumpStatus; aplyCmd(); } } void getSoilMoist(void) { int i = 0; soilMoist = 0; for (i = 0; i < 10; i++) // { soilMoist += analogRead(SOIL_MOIST_1_PIN); delay(20); } soilMoist = soilMoist / (i); soilMoist = map(soilMoist, 1023, 0, 0, 100); } void getDhtData(void) { tempDHT = dht.readTemperature(); humDHT = dht.readHumidity(); if (isnan(humDHT) || isnan(tempDHT)) { Serial.println("Failed to read from DHT sensor!"); return; } } void aplyCmd() { if (pumpStatus == 1) { Blynk.notify("pump ON"); digitalWrite(PUMP_PIN, LOW); PUMP.on(); } else { digitalWrite(PUMP_PIN, HIGH); PUMP.off(); } } void autoControlPlantation(void) { if (soilMoist < DRY_SOIL) { turnPumpOn(); } } void turnPumpOn() { pumpStatus = 1; aplyCmd(); delay (TIME_PUMP_ON * 1000); pumpStatus = 0; aplyCmd(); } void startTimers(void) { timer.setInterval(READ_AIR_DATA_TM * 1000, getDhtData); timer.setInterval(READ_SOIL_HUM_TM * 1000, getSoilMoist); timer.setInterval(SEND_UP_DATA_TM * 1000, sendUptime); timer.setInterval(AUTO_CTRL_TM * 1000, autoControlPlantation); } void sendUptime() { Blynk.virtualWrite(1, tempDHT); Blynk.virtualWrite(2, humDHT); Blynk.virtualWrite(3, soilMoist); }