#define BLYNK_TEMPLATE_ID "TMPL63IzUBq2y"
#define BLYNK_TEMPLATE_NAME "Quickstart Template"
#define BLYNK_AUTH_TOKEN "your_auth_token_here"
#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>
#include <LiquidCrystal.h>
char auth[] = "your_auth_token_here";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
#define DHTPIN 4
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
const int rs = 21, en = 22, d4 = 23, d5 = 19, d6 = 18, d7 = 5;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
const int moistureSensorPin = 32;
const int phSensorPin = 33;
const int npkSensorPin = 34;
BlynkTimer timer;
void setup() {
Serial.begin(115200);
Serial.println("Initializing...");
dht.begin();
lcd.begin(16, 2);
lcd.print("Initializing...");
delay(2000);
Blynk.begin(auth, ssid, pass);
timer.setInterval(2000L, sendSensorData);
}
void loop() {
Blynk.run();
timer.run();
}
void sendSensorData() {
float temperature = dht.readTemperature();
float humidity = dht.readHumidity();
if (isnan(temperature) || isnan(humidity)) {
Serial.println("Failed to read from DHT sensor!");
lcd.setCursor(0, 0);Cursor(0, 0);
lcd.print("DHT Read Error!");
Blynk.virtualWrite(V1, "Error");
Blynk.virtualWrite(V2, "Error");
return;
}
int soilMoistureValue = analogRead(moistureSensorPin);
int soilPHValue = analogRead(phSensorPin);
int soilNPKValue = analogRead(npkSensorPin);
Serial.print("Temperature: ");
Serial.print(temperature);
Serial.print("C, Humidity: ");
Serial.print(humidity);
Serial.println("%");
Serial.print("Soil Moisture: ");
Serial.println(soilMoistureValue);
Serial.print("Soil pH: ");
Serial.println(soilPHValue);
Serial.print("Soil NPK: ");
Serial.println(soilNPKValue);
Blynk.virtualWrite(V1, temperature);
Blynk.virtualWrite(V2, humidity);
Blynk.virtualWrite(V3, soilMoistureValue);
Blynk.virtualWrite(V4, soilPHValue);
Blynk.virtualWrite(V5, soilNPKValue);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Temp: ");
lcd.print(temperature);
lcd.print("C Hum: ");
lcd.print(humidity);
lcd.setCursor(0, 1);
lcd.print("Moist: ");
lcd.print(soilMoistureValue);
lcd.print("%");
}