#define BLYNK_TEMPLATE_ID "TMPL6t3NdKUCn"
#define BLYNK_TEMPLATE_NAME "WeightToPoints"
#define BLYNK_AUTH_TOKEN "vcsVO6vgMoqacGGhzxo0AxzJsIOpMCIw"
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <BlynkSimpleEsp32.h>
#include <WiFi.h>
#include <ESP32Servo.h>
#include <HX711.h>
#include <Crypto.h>


#define calibrationFactor_10kg 1234.56 // Replace with your actual calibration factor

#define DOUT_PIN 23
#define CLK_PIN 22

HX711 scale;
BlynkTimer timer;

void setup() {
  Serial.begin(115200);
  Blynk.begin(BLYNK_AUTH_TOKEN, WIFI_SSID, WIFI_PASSWORD);
  scale.begin(DOUT_PIN, CLK_PIN);
  scale.set_scale(calibrationFactor_10kg);
  scale.tare();
  timer.setInterval(1000L, sendWeightToBlynk);
}

void loop() {
  Blynk.run();
  timer.run();
}

void sendWeightToBlynk() {
  float weightKg = scale.get_units();
  Blynk.virtualWrite(V1, weightKg);
}

String generateHash(const String& input) {
  const int hashSize = SHA256_SIZE;
  byte hash[hashSize];
  SHA256 sha256;
  sha256.update((const uint8_t*)input.c_str(), input.length());
  sha256.finalize(hash);
  String hashedString = "";
  for (int i = 0; i < hashSize; ++i) {
    hashedString += String(hash[i], HEX);
  }
  return hashedString;
}

String encrypt_weight(int weight) {
  String salt = String(generateHash(String(weight)))[7];
  return salt;
}