Plant 🌳 Water Notification Using NodeMCU || Soil Moisture Sensor || Blynk App

Program Code :-

// Technical Scientist RM               //www.youtube.com/c/TechnicalScientistRM

#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>

#include <BlynkSimpleEsp8266.h>

char auth[] = "Auth Code";  //code sent via email

const int sensorPin = 4; 

int sensorState = 0;

int lastState = 0;

void setup()

{

  Serial.begin(9600);

  Blynk.begin(auth, "WiFi Name", "Password");  //wifi name and password

  pinMode(sensorPin, INPUT);

}

void loop()

{ 

  Blynk.run();

  sensorState = digitalRead(sensorPin);

Serial.println(sensorState);

if (sensorState == 1 && lastState == 0) {

  Serial.println("needs water, send notification");

  Blynk.notify("Time To Water The Plants");

  lastState = 1;

  delay(1000);

//send notification

    

  } 

  else if (sensorState == 1 && lastState == 1) {

    //do nothing, has not been watered yet

  Serial.println("has not been watered yet");

  delay(1000);

  }

  else {

    //st

    Serial.println("does not need water");

    lastState = 0;

    delay(1000);

  }

  

  delay(100);

}