GUI + all functions

#include <lvgl.h>
#include <Ticker.h>
#include <TFT_eSPI.h>

#include <WiFi.h>
#include "HX711.h"
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#include <Preferences.h>

#define TINY_GSM_MODEM_SIM800
#include <TinyGsmClient.h>
#include <HTTPClient.h>

#define ConversionSeconds 1000000 // Conversion factor for micro seconds to seconds //
#define SleepTime 10 //  Time ESP32 will go to sleep (in seconds)
#define NTP_SERVER "de.pool.ntp.org"
#define TZ_INFO "WEST-1DWEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00" // Western European Time
#define BME_SCL 22    // Pin Define BME280
#define BME_SDA 21    // Pin Define BME280
#define SEALEVELPRESSURE_HPA (1013.25)
#define BUTTON 12     // Pin Define for a Button to set the scale to Tare

Adafruit_BME280 bme; // I2C BME 280
//SHT21 SHT21;


#define SerialMon Serial
#define RX2 16    // Pin Define für GSM Modul SIM800L
#define TX2 17    // Pin Define für GSM Modul SIM800L
#define SerialAT Serial2
#define TINY_GSM_RX_BUFFER 1024
#define TINY_GSM_DEBUG SerialMon
#define GSM_PIN ""

const int relaisPin = 13;  //Pin Define relais 3.3 Volt hx711 + bme180
const int relaisPin1 = 02; //Pin Define relais 4.1 Volt Sim800L
const int relaisPin2 = 15; //Pin Define relais 5v hx711

const int LOADCELL_DOUT_PIN = 35; // Define for HX711 Scale Pins
const int LOADCELL_SCK_PIN = 32; // Define for HX711 Scale Pins
int buttonState = 0;
bool buttonPressed = false;
HX711 scale;              //setting hx711 as scale in library
Preferences preferences;  // Methode for saving Tare Results

unsigned long delayTime;

const int wdtTimeout = 20000;  //time in ms to trigger the watchdog
hw_timer_t *timer = NULL;

RTC_DATA_ATTR int BootCounter = 0;   // Variables that stays in RTC memory after reset
RTC_DATA_ATTR float Tare;
RTC_DATA_ATTR float temperature = 0;
RTC_DATA_ATTR float pressure = 0;
RTC_DATA_ATTR float approx_altitude = 0;
RTC_DATA_ATTR float humidity = 0;
//RTC_DATA_ATTR float g_temperature = 0;



#define LVGL_TICK_PERIOD 60
Ticker tick; /* timer for interrupt handler */
TFT_eSPI tft = TFT_eSPI(); /* TFT instance */
static lv_disp_buf_t disp_buf;
static lv_color_t buf[LV_HOR_RES_MAX * 10];
static void create_tab1(lv_obj_t * parent);
static void create_tab2(lv_obj_t * parent);
static void create_tab3(lv_obj_t * parent);
lv_obj_t * slider_label;
int screenWidth = 480;
int screenHeight = 320;



#if USE_LV_LOG != 1
/* Serial debugging */
void my_print(lv_log_level_t level, const char * file, uint32_t line, const char * dsc)
{

  Serial.printf("%s@%d->%s\r\n", file, line, dsc);
  delay(100);
}
#endif

/* Display flushing */
void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
{
  uint16_t c;

  tft.startWrite(); /* Start new TFT transaction */
  tft.setAddrWindow(area->x1, area->y1, (area->x2 - area->x1 + 1), (area->y2 - area->y1 + 1)); /* set the working window */
  for (int y = area->y1; y <= area->y2; y++) {
    for (int x = area->x1; x <= area->x2; x++) {
      c = color_p->full;
      tft.writeColor(c, 1);
      color_p++;
    }
  }
  tft.endWrite(); /* terminate TFT transaction */
  lv_disp_flush_ready(disp); /* tell lvgl that flushing is done */
}

bool my_touchpad_read(lv_indev_drv_t * indev_driver, lv_indev_data_t * data)
{
    uint16_t touchX, touchY;

    bool touched = tft.getTouch(&touchX, &touchY, 600);

    if(!touched)
    {
      return false;
    }

    if(touchX>screenWidth || touchY > screenHeight)
    {
      Serial.println("Y or y outside of expected parameters..");
      Serial.print("y:");
      Serial.print(touchX);
      Serial.print(" x:");
      Serial.print(touchY);
    }
    else
    {

      data->state = touched ? LV_INDEV_STATE_PR : LV_INDEV_STATE_REL;

      /*Save the state and save the pressed coordinate*/
      //if(data->state == LV_INDEV_STATE_PR) touchpad_get_xy(&last_x, &last_y);

      /*Set the coordinates (if released use the last pressed coordinates)*/
      data->point.x = touchX;
      data->point.y = touchY;

      Serial.print("Data x");
      Serial.println(touchX);

      Serial.print("Data y");
      Serial.println(touchY);

    }

    return false; /*Return `false` because we are not buffering and no more data to read*/
}

/* Interrupt driven periodic handler */
static void lv_tick_handler(void)
{

  lv_tick_inc(LVGL_TICK_PERIOD);
}



void IRAM_ATTR resetModule()        //Function to Reboot ESP through Watchdog
{
 ets_printf("reboot durch watchdog\n");
 esp_restart();
}



void configureWatchdog()
{
  timer = timerBegin(0, 80, true);                  //timer 0, div 80
  timerAttachInterrupt(timer, &resetModule, true);  //attach callback
  timerAlarmWrite(timer, wdtTimeout * 1000, false); //set time in us
  timerAlarmEnable(timer);                          //enable interrupt
  Serial.println("Watchdog durchlaufen");
}



void FirstStart()
{
  Serial.println("Good mooooorning Vieeeetnaaam");
  delay(300);                             // Delay for preventing boot bug
  WiFi.mode(WIFI_STA);
  WiFi.begin("xxxxxxxx", "xxxxxxxxx");             // Start wifimode
  Serial.println("");

  while (WiFi.status() != WL_CONNECTED)  //
  {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());
  Serial.println("Fetching NTP Time");
  struct tm local;
  configTzTime(TZ_INFO, NTP_SERVER); // Sync systemtime timezone with NTP
  getLocalTime(&local, 1000);      // Sync local time for 1 seconds
  //WiFi.disconnect();
  //WiFi.mode(WIFI_OFF);              //End wifimode
  Serial.println("First start done");
}



void setup() {

  esp_sleep_wakeup_cause_t wakeup_cause; // Variable for wakeup reason
  setenv("TZ", TZ_INFO, 1);             // Setting timezone after reset
  tzset();


  pinMode (relaisPin, OUTPUT);        //switching relais on for 3.3V power (Display + Touch, HX711 Scale, BME Sensor)
  digitalWrite (relaisPin, HIGH);     //switching relais on for 3.3V power (Display + Touch, HX711 Scale, BME Sensor)
  delay(500);
  pinMode (relaisPin2, OUTPUT);       //switching relais on for 4.1V power (SIM800l GSM Modul)
  digitalWrite (relaisPin2, HIGH);    //switching relais on for 4.1V power (SIM800l GSM Modul)
  delay(500);
  pinMode (relaisPin1, OUTPUT);      //switching relais on for 5.0V power (HX711 Scale)
  digitalWrite (relaisPin1, HIGH);  //switching relais on for 5.0V power (HX711 Scale)
  delay(500);
  pinMode(BUTTON, INPUT_PULLUP);           // define mode for tara button
  Serial.println("button");
  pinMode (4, OUTPUT);             // define mode for led display backlight
  digitalWrite (4, HIGH);         // define mode for led display backlight
  delay(500);

  ledcSetup(10, 5000/*freq*/, 10 /*resolution*/);
  ledcAttachPin(32, 10);
  analogReadResolution(10);
  ledcWrite(10,768);
  //const char test = '9' ;
  #define MAX_STRING_SIZE 5
  float test = 52.4;
  char test2[MAX_STRING_SIZE];
  snprintf(test2, MAX_STRING_SIZE, "%f", test);


  Serial.begin(115200); /* prepare for possible serial debug */
  Serial.println("Setup start");
  //configureWatchdog();
  ++BootCounter;

  Serial.println("Going to lv_init");
  delay(500);


  lv_init();

  #if USE_LV_LOG != 0
    lv_log_register_print(my_print); /* register print function for debugging */
  #endif

  tft.begin(); /* TFT init */
  tft.setRotation(1);

  uint16_t calData[5] = { 275, 3620, 264, 3532, 1 };
  tft.setTouch(calData);

  lv_disp_buf_init(&disp_buf, buf, NULL, LV_HOR_RES_MAX * 10);

  /*Initialize the display*/
  lv_disp_drv_t disp_drv;
  lv_disp_drv_init(&disp_drv);
  disp_drv.hor_res = 320;
  disp_drv.ver_res = 240;
  disp_drv.flush_cb = my_disp_flush;
  disp_drv.buffer = &disp_buf;
  lv_disp_drv_register(&disp_drv);

  lv_indev_drv_t indev_drv;
  lv_indev_drv_init(&indev_drv);             /*Descriptor of a input device driver*/
  indev_drv.type = LV_INDEV_TYPE_POINTER;    /*Touch pad is a pointer-like device*/
  indev_drv.read_cb = my_touchpad_read;      /*Set your driver function*/
  lv_indev_drv_register(&indev_drv);         /*Finally register the driver*/


  /*Initialize the touch pad*/
  // lv_indev_drv_t indev_drv;
  //lv_indev_drv_init(&indev_drv);
  //indev_drv.type = LV_INDEV_TYPE_ENCODER;
  //indev_drv.read_cb = read_encoder;
  //lv_indev_drv_register(&indev_drv);

  /*Initialize the graphics library's tick*/
  tick.attach_ms(LVGL_TICK_PERIOD, lv_tick_handler);

  //Set the theme..
  lv_theme_t * th = lv_theme_material_init(210, NULL);     //Set a HUE value and a Font for the Night Theme
  lv_theme_set_current(th);

  lv_obj_t * scr = lv_cont_create(NULL, NULL);
  lv_disp_load_scr(scr);





    /*Create a Tab view object*/
    lv_obj_t *tabview;
    tabview = lv_tabview_create(lv_scr_act(), NULL);

    /*Add 3 tabs (the tabs are page (lv_page) and can be scrolled*/
    lv_obj_t *tab1 = lv_tabview_add_tab(tabview, "Uebersicht");
    lv_obj_t *tab2 = lv_tabview_add_tab(tabview, "Visualisierung");
    lv_obj_t *tab3 = lv_tabview_add_tab(tabview, "Einstellungen");




/*Create a normal cell style*/
    static lv_style_t style_cell1;
    lv_style_copy(&style_cell1, &lv_style_plain);
    style_cell1.body.border.width = 2;
    style_cell1.body.border.color = LV_COLOR_BLACK;

    /*Crealte a header cell style*/
    static lv_style_t style_cell2;
    lv_style_copy(&style_cell2, &lv_style_plain);
    style_cell2.body.border.width = 2;
    style_cell2.body.border.color = LV_COLOR_BLACK;
    style_cell2.body.main_color = LV_COLOR_SILVER;
    style_cell2.body.grad_color = LV_COLOR_SILVER;

    lv_obj_t * table = lv_table_create(tab1, NULL);
    lv_table_set_style(table, LV_TABLE_STYLE_CELL1, &style_cell1);
    lv_table_set_style(table, LV_TABLE_STYLE_CELL2, &style_cell2);
    lv_table_set_style(table, LV_TABLE_STYLE_BG, &lv_style_transp_tight);
    lv_table_set_col_cnt(table, 2);
    lv_table_set_row_cnt(table, 5);
    lv_obj_align(table, NULL, LV_ALIGN_CENTER, -18, 0);

    /*Make the cells of the first row center aligned */
    lv_table_set_cell_align(table, 0, 0, LV_LABEL_ALIGN_CENTER);
    lv_table_set_cell_align(table, 0, 1, LV_LABEL_ALIGN_CENTER);

    /*Make the cells of the first row TYPE = 2 (use `style_cell2`) */
    lv_table_set_cell_type(table, 0, 0, 2);
    lv_table_set_cell_type(table, 0, 1, 2);



    /*Fill the first column*/
    lv_table_set_cell_value(table, 0, 0, "Sensor");
    lv_table_set_cell_value(table, 1, 0, "Gewicht" );
    lv_table_set_cell_value(table, 2, 0, "Temperatur");
    lv_table_set_cell_value(table, 3, 0, "Luftfeuchtigkeit");
    lv_table_set_cell_value(table, 4, 0, "Luftdruck");
    /*Fill the second column*/
    lv_table_set_cell_value(table, 0, 1, "Wert");
    lv_table_set_cell_value(table, 1, 1, test2 );
    lv_table_set_cell_value(table, 2, 1, "0");
    lv_table_set_cell_value(table, 3, 1, "0");
    lv_table_set_cell_value(table, 4, 1, "0");
    //Width of cell
    lv_table_set_col_width(table, 0, 130);
    // Cell grows not with words
    lv_table_set_cell_crop(table, 3, 0, true);

 /*Add content to the tabs*/
    lv_obj_t * label = lv_label_create(tab1, NULL);
    lv_label_set_text(label, "");
    label = lv_label_create(tab2, NULL);
    lv_label_set_text(label, "");






    label = lv_label_create(tab3, NULL);
    lv_label_set_text(label, "");



   // lv_obj_t * label;

    lv_obj_t * btn1 = lv_btn_create(tab3, NULL);
    lv_obj_set_event_cb(btn1, event_handler);
    lv_obj_align(btn1, NULL, LV_ALIGN_CENTER, 0, -40);

    label = lv_label_create(btn1, NULL);
    lv_label_set_text(label, "Deepsleep");

    lv_obj_t * btn2 = lv_btn_create(tab3, NULL);
    lv_obj_set_event_cb(btn2, event_handler);
    lv_obj_align(btn2, NULL, LV_ALIGN_CENTER, 0, 40);
    lv_btn_set_toggle(btn2, true);
    lv_btn_toggle(btn2);
    lv_btn_set_fit2(btn2, LV_FIT_NONE, LV_FIT_TIGHT);

    label = lv_label_create(btn2, NULL);
    lv_label_set_text(label, "Handy Nr.");



   lv_coord_t w = lv_page_get_scrl_width(tab2);

    lv_obj_t * chart = lv_chart_create(tab2, NULL);
    lv_chart_set_type(chart, LV_CHART_TYPE_AREA);
    lv_obj_set_size(chart, w / 1.5, lv_disp_get_ver_res(NULL) / 1.5);
    lv_obj_set_pos(chart, LV_DPI / 10, LV_DPI / 10);
    lv_chart_series_t * s1 = lv_chart_add_series(chart, LV_COLOR_RED);
    lv_chart_set_next(chart, s1, 30);
    lv_chart_set_next(chart, s1, 20);
    lv_chart_set_next(chart, s1, 10);
    lv_chart_set_next(chart, s1, 12);
    lv_chart_set_next(chart, s1, 20);
    lv_chart_set_next(chart, s1, 27);
    lv_chart_set_next(chart, s1, 35);
    lv_chart_set_next(chart, s1, 55);
    lv_chart_set_next(chart, s1, 70);
    lv_chart_set_next(chart, s1, test);



  Serial.println("Start Nr.: " + String(BootCounter));
  SerialAT.begin(9600, SERIAL_8N1);
  delay(1000);
  Serial.println("Initializing...SIM800L GSM Modul");
  delay(1000);

  SerialAT.println("AT"); //Once the handshake test is successful, it will back to OK
  updateSerialMon();
  SerialAT.println("AT+CSQ"); //Once the handshake test is successful, it will back to OK
  updateSerialMon();
  SerialAT.println("AT+CREG?"); //Once the handshake test is successful, it will back to OK
  updateSerialMon();
  SerialAT.println("AT+COPS?"); //Once the handshake test is successful, it will back to OK
  updateSerialMon();
  Serial.println("GSM DONE");


  wakeup_cause = esp_sleep_get_wakeup_cause(); // fetching wakeupreason
  if (wakeup_cause != 3) FirstStart();     // new startup after manual reset
  Serial.println("Scale begin (void setup) ");

  Serial.println("Scale Done (void setup)");
  // Serial.println("SHT21 test");
  //SHT21.begin();

  delayTime = 1000;
  bool status;
  // default settings
  // (you can also pass in a Wire library object like &Wire2)
  Serial.println("Begin I2C BME Sensor (setup)");
  status = bme.begin(0x76);
  Serial.println("BME started(setup)");
  if (!status) {
    Serial.println("Could not find a valid BME280 sensor, check wiring!");
    while (1);
  }








  Serial.println("void setup done");




}

void loop() {


 lv_task_handler(); /* let the GUI do its work */
  delay(5);
 // timerWrite(timer, 0);
  //tm local;
 // getLocalTime(&local);
 // Serial.println(&local, "Date: %d.%m.%y  Local Time from NTP: %H:%M:%S"); // Setting format for print in serial monitor

  button();     // calling tare button function

  wiegen();     //  calling weight function

  klima();      // calling temprature and humidity and pressure function

  Serial.println("Entering Deepsleepmode \r\n \r\n");
  Serial.println("Good night sweet prince :* \r\n \r\n");
  digitalWrite (relaisPin, LOW);
  digitalWrite (relaisPin1, LOW);
  digitalWrite (relaisPin2, LOW);
  Serial.println("Display OUT");
  digitalWrite (4, LOW);

  esp_sleep_enable_timer_wakeup(SleepTime * ConversionSeconds);    // setting time interval for deep sleep
  esp_deep_sleep_start();                       // starting deep sleep mode
}

void button ()
{
  Serial.println("Bitte drücken Sie den Tara knopf für 5 sekunden");
  delay(500);
  buttonState = digitalRead(BUTTON); // define variable for tare button
  delay(100);
  Serial.println(buttonState);  // print 0 if button is pressed otherwise 1
    Tare = (scale.get_units(10)); // saves average from 10 measurements
    Serial.println(Tare);         // saves average from 10 measurements
    preferences.begin("Tara", false);   // open folder on esp to save tare value to be reset safe
    preferences.putFloat("TaraGewicht", Tare);    // saving tare value
    preferences.end();   //  closing folder
  }
 }

void wiegen()
{
  Serial.print("Scale set scale (void wiegen)");
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);   // beginig scale hx711 connection with pins from define
  Serial.print("Scale begin (void wiegen)");
  scale.set_scale(28633.1136);                        // Scalefactor of the scale
  Serial.print("Scale Power UP (void wiegen)");
  scale.power_up(); //HX711 ADC booting
  float gewicht = 0;   // declaration of variable for weight
  Serial.print("Einzelablesung:\t");
  Serial.print(scale.get_units());    //  reading actual wieght without tare result
  preferences.begin("Tara", false);   // opening a folder for saving and writing tara
  Tare = preferences.getFloat("TaraGewicht", 0);  // den Geschützten Wert aufrufen und in der Variablen Tare speichern
  gewicht = (scale.get_units(10));   // save the average from 10 meassurements
  gewicht = (gewicht - Tare);        // calculate actual weight
  Serial.print(gewicht, 1);         // printing result
  Serial.print("\t| Schnitt:\t");
  Serial.print(gewicht, 2);         // printing result
  Serial.print("\t| Schnitt:\t");
  Serial.println(gewicht, 3);       // printing result
  preferences.end();                // close folder
  scale.power_down();             // put the ADC in sleep mode

  if (gewicht < 0)                //if the result saved in gewicht is to low the alert sms function will be called
  {
  sms_weight ();
  }
}

void sms_weight ()
{

 delay(3000);
 SerialAT.println("AT+CSQ");         //Once the handshake test is successful, it will back to OK
 updateSerialMon();
 SerialAT.println("AT+CMGF=1");     // Configuring TEXT mode
 updateSerialMon();
 SerialAT.println("AT+CMGS=\"+xxxxxxxxxxx\"");//change ZZ with country code and xxxxxxxxxxx with phone number to sms
 updateSerialMon();
 SerialAT.println("ALAAARM!!!Bees have left the Building...Powered by ESP32"); //text content
 updateSerialMon();
 SerialAT.write(26);
 delay(4000);
}


void klima ()
{
  float temperatur = bme.readTemperature();         //define variables for enviroment measurement
  float luftdruck = bme.readPressure() / 100.0F;    //define variables for enviroment measurement
  float luftfeuchtigkeit = bme.readHumidity();      //define variables for enviroment measurement
  //float g_temperature = (SHT21.getTemperature()); //define variables for enviroment measurement

  Serial.print("Temperature = ");
  Serial.print(temperatur);
  Serial.println(" °C");

  Serial.print("Pressure = ");
  Serial.print(luftdruck);
  Serial.println(" hPa");

  Serial.print("Humidity = ");
  Serial.print(luftfeuchtigkeit);
  Serial.println(" %");


 // Serial.print("Case Temperature = ");
 // Serial.print(g_temperature);
  //Serial.println(" *C");

  Serial.println();
  delay(500);
//if connected make a http connection to a php skript on a server to save enviroment values to a mysql database
  if ((WiFi.status() == WL_CONNECTED)) {
     HTTPClient http;

    float temperatur = bme.readTemperature();
    float luftdruck = bme.readPressure() / 100.0F;
    float luftfeuchtigkeit = bme.readHumidity();

    String url;
    url += "xxxxxxxxxxx/writemysql.php?temp=";
    url += String(temperatur);
    url += "&luftd=";
    url += String(luftdruck);
    url += "&luftf=";
    url += String(luftfeuchtigkeit);

    http.begin(url);
    http.GET();
    http.end();
    delay(1000);
    WiFi.disconnect(true);
}   WiFi.mode(WIFI_OFF);              //End wifimode
}



 void updateSerialMon()
{
  delay(500);
  while (Serial.available())
  {
    SerialAT.write(SerialMon.read());//Forward what Serial received to Software Serial Port
  }
  while(SerialAT.available())
  {
    SerialMon.write(SerialAT.read());//Forward what Software Serial received to Serial Port
  }

}