// #if defined(ESP8266)
// #include <ESP8266WiFi.h>
// #elif defined(ESP32)
// #include <WiFi.h>
// #endif

#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

#include <HX711_ADC.h>
#if defined(ESP8266)|| defined(ESP32) || defined(AVR)
#include <EEPROM.h>                          // เปิดการใช้งาน eeprom
#endif

//pins:
const int HX711_dout = 13; //mcu > HX711 dout pin
const int HX711_sck = 12; //mcu > HX711 sck pin

//HX711 constructor:
HX711_ADC LoadCell(HX711_dout, HX711_sck);    // เปิดการใช้งาน โหลด cell

const int calVal_calVal_eepromAdress = 0;
unsigned long t = 0;

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

#define SERIAL_DEBUG_BAUD 115200

#define LED 15
int status = WL_IDLE_STATUS;

void InitWiFi(){
  Serial.println("Connecting to AP ...");
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED){
    delay(500);
    Serial.println(".");
  }
  Serial.println("Connected to AP");
}

void reconnect(){
  status = WiFi.status();
  if (status != WL_CONNECTED){
    WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
    while (WiFi.status() != WL_CONNECTED){
      delay(500);
      Serial.println(".");
    }
    Serial.println("Connected to AP");
  }
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(SERIAL_DEBUG_BAUD);
  Serial.println();
  InitWiFi();

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print(WIFI_SSID);
  LCD.setCursor(0, 1);
  LCD.print(WiFi.localIP());

  pinMode(LED, OUTPUT);

   float calibrationValue; // calibration value 136916.35;145186.00 155574.12
 // calibrationValue = 155574.12;// uncomment this if you want to set this value in the sketch
  calibrationValue = 420;
#if defined(ESP8266) || defined(ESP32)
  //EEPROM.begin(512); // uncomment this if you use ESP8266 and want to fetch this value from eeprom
#endif
  //EEPROM.get(calVal_eepromAdress, calibrationValue); // uncomment this if you want to fetch this value from eeprom

  LoadCell.begin();
  //LoadCell.setReverseOutput();
  unsigned long stabilizingtime = 0; // tare preciscion can be improved by adding a few seconds of stabilizing time
  boolean _tare = true; //set this to false if you don't want tare to be performed in the next step
  LoadCell.start(stabilizingtime, _tare);
  if (LoadCell.getTareTimeoutFlag()) {
    Serial.println("Timeout, check MCU>HX711 wiring and pin designations");
  }
  else {
    LoadCell.setCalFactor(calibrationValue); // set calibration factor (float)
    Serial.println("Startup is complete");
  }
  while (!LoadCell.update());
  Serial.print("Calibration value: ");
  Serial.println(LoadCell.getCalFactor());
  Serial.print("HX711 measured conversion time ms: ");
  Serial.println(LoadCell.getConversionTime());
  Serial.print("HX711 measured sampling rate HZ: ");
  Serial.println(LoadCell.getSPS());
  Serial.print("HX711 measured settlingtime ms: ");
  Serial.println(LoadCell.getSettlingTime());
  Serial.println("Note that the settling time may increase significantly if you use delay() in your sketch!");
  if (LoadCell.getSPS() < 7) {
    Serial.println("!!Sampling rate is lower than specification, check MCU>HX711 wiring and pin designations");
  }
  else if (LoadCell.getSPS() > 100) {
    Serial.println("!!Sampling rate is higher than specification, check MCU>HX711 wiring and pin designations");
  }
}

void loop() {
  static boolean newDataReady = 0;
  const int serialPrintInterval = 100; //increase value to slow down serial print activity

  // check for new data/start next conversion:
  if (LoadCell.update()) newDataReady = true;

  // get smoothed value from the dataset:
  if (newDataReady) {
    if (millis() > t + serialPrintInterval) {
      float i = LoadCell.getData();
      Serial.print("Load_cell output val: ");
      Serial.println(i);
      newDataReady = 0;
      t = millis();
    }
  }
  delay(1000);

  if (WiFi.status() != WL_CONNECTED){
    reconnect();
  } 
  else {
    Serial.print("WiFi SSID ");
    Serial.println(WIFI_SSID);
    Serial.print("IP: ");
    Serial.println(WiFi.localIP());
    digitalWrite(LED, HIGH);
    delay(200);
    digitalWrite(LED, LOW);
  }
}