Smart Agriculture - controlling the water level

#include <ESP8266WiFi.h>
#include "IFTTTWebhook.h"

#define WIFI_SSID "your SSID here"
#define WIFI_PASSWORD "your password here"
#define IFTTT_API_KEY "ceubX8trC3ZXKFTrEMXc-Z"  //the Webhooks key.
#define IFTTT_EVENT_NAME "oximetry_heart_rate_sensor" //the event name.

int adc_id = 0;
int HistoryValue = 0;
char printBuffer[128];

// constants won't change
const int RELAY_PIN = A5;  // the Arduino pin, which connects to the IN pin of relay

void setup()
 WiFi.mode(WIFI_STA);
 WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

  IFTTTWebhook wh(IFTTT_API_KEY, IFTTT_EVENT_NAME);
  wh.trigger(value);

{
  Serial.begin(9600);
  pinMode(RELAY_PIN, OUTPUT); // initialize digital pin A5 as an output.
  digitalWrite(RELAY_PIN, LOW);  // turn off pump
}

void loop()
{
    int value = analogRead(adc_id); // get adc value from A0

    if(((HistoryValue>=value) && ((HistoryValue - value) > 10)) || ((HistoryValue<value) && ((value - HistoryValue) > 10)))
    {
      sprintf(printBuffer,"ADC%d level is %d\n",adc_id, value);
      Serial.print(printBuffer);
      HistoryValue = value;
    }
    if(value < 50)  // parameter should be adjusted to the waterer low level
    {
      digitalWrite(RELAY_PIN, HIGH); // turn on pump
    }
    if(value > 600)  // parameter should be adjusted to the waterer high level
    {
      digitalWrite(RELAY_PIN, LOW);  // turn off pump
    }
}