smart irrigation through wifi module

#include "DHT.h" #include #include SoftwareSerial wifi(2, 3); const int rs = 13, en = 12, d4 = 11, d5 = 10, d6 = 9, d7 = 8; LiquidCrystal lcd(rs, en, d4, d5, d6, d7); #define DHTPIN 7 #define DHTTYPE DHT11 DHT dht(DHTPIN, DHTTYPE); int buz = A2; #define RELAY_PIN 6 #define SOIL_SENSOR A0 bool autoMode = false; // Flag for auto mode void setup() { wifi.begin(115200); Serial.begin(9600); pinMode(buz, OUTPUT); digitalWrite(buz, LOW); pinMode(RELAY_PIN, OUTPUT); digitalWrite(RELAY_PIN, HIGH); dht.begin(); lcd.begin(16, 2); lcd.setCursor(0, 0); lcd.print(" SMART IRRIGATION"); lcd.setCursor(0, 1); lcd.print(" SYSTEM READY"); delay(2000); wifi_init(); delay(3000); } void loop() { int h = dht.readHumidity(); int t = dht.readTemperature(); int s = analogRead(SOIL_SENSOR); int mos = map(s, 1023, 0, 0, 100); lcd.clear(); lcd.setCursor(0, 0); lcd.print("Temp:" + String(t) + "C"); lcd.setCursor(10, 0); lcd.print("H:" + String(h) + "%"); lcd.setCursor(0, 1); lcd.print("Soil: " + String(mos) + "%"); delay(1000); upload_iot(t, h, mos); // Always check for command int cmd = read_iot(); // Command Handling: if (cmd == '1') { autoMode = true; // Enter auto mode lcd.clear(); lcd.setCursor(0, 0); lcd.print("CMD:1 RECEIVED"); lcd.setCursor(0, 1); lcd.print("AUTO MODE ON"); delay(1500); } else if (cmd == '2') { autoMode = false; // Exit auto mode digitalWrite(RELAY_PIN, HIGH); // Pump OFF lcd.clear(); lcd.setCursor(0, 0); lcd.print("CMD:2 RECEIVED"); lcd.setCursor(0, 1); lcd.print("PUMP: OFF"); delay(1500); digitalWrite(buz,1); delay(2000); digitalWrite(buz,0); } // If autoMode is active, check soil and control pump if (autoMode) { if (mos < 60) { digitalWrite(RELAY_PIN, LOW); // Pump ON lcd.clear(); lcd.setCursor(0, 0); lcd.print("AUTO: Soil<60%"); lcd.setCursor(0, 1); lcd.print("PUMP: ON"); } else { digitalWrite(RELAY_PIN, HIGH); // Pump OFF lcd.clear(); lcd.setCursor(0, 0); lcd.print("AUTO: Soil>60%"); lcd.setCursor(0, 1); lcd.print("PUMP: OFF"); } delay(1500); } } void wifi_init() { wifi.println("AT+RST"); delay(2000); wifi.println("AT+CWMODE=1"); delay(1000); wifi.print("AT+CWJAP="); wifi.write('"'); wifi.print("DIMPUL"); // SSID wifi.write('"'); wifi.write(','); wifi.write('"'); wifi.print("1234567890"); // Password wifi.write('"'); wifi.println(); delay(1000); } void upload_iot(int x, int y, int z) { String cmd = "AT+CIPSTART=\"TCP\",\""; cmd += "184.106.153.149"; // api.thingspeak.com cmd += "\",80"; wifi.println(cmd); delay(1500); String getStr = "GET /update?api_key=REIKT92SEF7HAZ4W&field1="; getStr += String(x); getStr += "&field2="; getStr += String(y); getStr += "&field3="; getStr += String(z); getStr += "\r\n\r\n"; cmd = "AT+CIPSEND="; cmd += String(getStr.length()); wifi.println(cmd); delay(1500); wifi.println(getStr); delay(1500); } int read_iot() { int ch; String cmd = "AT+CIPSTART=\"TCP\",\""; cmd += "184.106.153.149"; // api.thingspeak.com cmd += "\",80"; wifi.println(cmd); delay(1500); String getStr = "GET /channels/2878613/fields/1/last?api_key=UVJX2NA46R1BKRP1\r\n\r\n"; cmd = "AT+CIPSEND="; cmd += String(getStr.length()); wifi.println(cmd); delay(1500); wifi.print(getStr); delay(200); ch = 0; if (wifi.find("~")) { delay(10); ch = wifi.read(); } return ch; }