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main.c

+#include <SPI.h>
+#include <WiFiNINA.h>
+#include <Wire.h>
+#include <LiquidCrystal_I2C.h>
+
+char ssid[] = "Enterwifiname"; 
+char pass[] = "Enterpassword";
+int keyIndex = 0;
+
+int status = WL_IDLE_STATUS;
+WiFiServer server(80);
+
+const char* thingSpeakApiKey = "MRIHLKXFMUDD5V0K";
+const char* thingSpeakAddress = "api.thingspeak.com";
+const int thingSpeakPort = 80;
+
+LiquidCrystal_I2C lcd(0x27, 16, 2);
+
+void setup() {
+  Serial.begin(9600);
+
+  //This was the first setup for the system which powers on and connects... 
+//...the LCD to display "Irrigation ssytem is on".
+  lcd.init();
+  lcd.backlight();
+  lcd.clear();
+  pinMode(2, OUTPUT);
+  digitalWrite(2, HIGH);
+  delay(1000);
+  lcd.setCursor(0, 0);
+  lcd.print("IRRIGATION");
+  lcd.setCursor(0, 1);
+  lcd.print("SYSTEM IS ON ");
+  lcd.print("");
+  delay(3000);
+  lcd.clear();
+
+  // WiFi setup
+  while (status != WL_CONNECTED) {
+    Serial.print("Attempting to connect to Network named: ");
+    Serial.println(ssid);
+    status = WiFi.begin(ssid, pass);
+    delay(10000);
+  }
+
+  server.begin();
+
+  Serial.print("SSID: ");
+  Serial.println(WiFi.SSID());
+  IPAddress ip = WiFi.localIP();
+  Serial.print("IP Address: ");
+  Serial.println(ip);
+}
+
+void loop() { //Loop to make the water pump turn on once the soil moisture is low from...void
+//...reading Analog Pin (A0) on the Arduino.
+  
+  int value = analogRead(A0);
+  Serial.println(value);
+
+ 
+  if (value > 950) {
+    digitalWrite(2, LOW);
+    lcd.setCursor(0, 0);
+    lcd.print("Water Pump is ON ");
+  } else {
+    digitalWrite(2, HIGH);
+    lcd.setCursor(0, 0);
+    lcd.print("Water Pump is OFF");
+  }
+//Programs the soil mositure sensor to be at a Low, Mid or High state at a certain value.
+  if (value < 300) {
+    lcd.setCursor(0, 1);
+    lcd.print("Moisture : HIGH");
+  } else if (value > 300 && value < 950) {
+    lcd.setCursor(0, 1);
+    lcd.print("Moisture : MID ");
+  } else if (value > 950) {
+    lcd.setCursor(0, 1);
+    lcd.print("Moisture : LOW ");
+  }
+
+  
+  uploadToThingSpeak(value);
+
+
+  
+}
+
+void uploadToThingSpeak(int moistureValue) {
+  WiFiClient client;
+
+  if (client.connect(thingSpeakAddress, thingSpeakPort)) {
+    String url = "/update?api_key=";
+    url += thingSpeakApiKey;
+    url += "&field1=";
+    url += String(moistureValue);
+
+    client.print(String("GET ") + url + " HTTP/1.1\r\n" +
+                 "Host: " + thingSpeakAddress + "\r\n" +
+                 "Connection: close\r\n\r\n");
+
+    Serial.println("Data sent to ThingSpeak!");
+  } else {
+    Serial.println("Failed to connect to ThingSpeak");
+  }
+
+  client.stop();
+}
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