// ESP32_ILI9341_openweathermap

// downloads json string from openweather.com
// for environmental conditions of (any) town
// displays alphanumerically, with gauges and with icons 
//
// updates every five minutes in Loop -  check the variable named timerDelay
//
// microcontroller ESP32-WROOM-32
// current display TFT 018  =  320*240 ILI9341 controller
// implements Bodmer's TFT_ESPI library 
// implements Bodmer's rainbow scale gauge
//
// json instructions by Rui Santos
// at https://RandomNerdTutorials.com/esp32-http-get-open-weather-map-thingspeak-arduino/
//
// public domain
// July 6, 2021 - minor issues fixed, compass pointer fixed
// Floris Wouterlood
//
// Make sure all the display driver and pin conections are correct by
// editing the User_Setup.h file in the TFT_eSPI library folder.
//
// ######################################################################################
// ######   DON'T FORGET TO UPDATE THE User_Setup.h FILE IN THE TFT_eSPI LIBRARY    #####
// ######################################################################################

   #include <TFT_eSPI.h>   
   #include <WiFi.h>
   #include <HTTPClient.h>
   #include <Arduino_JSON.h>
   #include "Free_Fonts.h"                                                                  // include the header file attached to this sketch - part of TFT_eSPI package

   TFT_eSPI tft = TFT_eSPI();   
   TFT_eSprite sprite1 = TFT_eSprite(&tft);

   #define WHITE       0xFFFF
   #define BLACK       0x0000
   #define BLUE        0x001F
   #define RED         0xF800
   #define GREEN       0x07E0
   #define CYAN        0x07FF
   #define MAGENTA     0xF81F
   #define YELLOW      0xFFE0
   #define GREY        0x2108 
   #define SCALE0      0xC655                                                               // accent color for unused scale segments                                   
   #define SCALE1      0x5DEE                                                               // accent color for unused scale segments
   #define TEXT_COLOR  0xFFFF                                                               // is currently white 

int32_t xC = 160, yC = 110;  //souřad středu
int32_t irad = 85, orad = 95;
uint32_t startAngle=175, endAngle=185; 
uint32_t fg_color=TFT_ORANGE, bg_color=TFT_ORANGE;
//uint32_t DarkGrey = 0x1A1A1A;     //definice tmavé šedé
//#define CeHn (0, 191, 255) 

const int HodnPotPin = A6;  //Analog Pin ADC6 = A6 = G34
int HodnPot;
int HodnBar;
float Voltage;
float Current;
int Cas;


void setup() {
 Serial.begin(115200);  
tft.begin();
tft.setRotation(1);  
tft.fillScreen(TFT_BLACK);

sprite1.createSprite(320, 20);              //velikost sprite


// 


}

void loop() {
 HodnPot = analogRead(HodnPotPin);
 HodnBar = map(HodnPot, 0, 4095, -90, 90);
 Voltage = map(HodnPot, 0, 4095, 0, 430.0); 
 Current = map(HodnPot, 0, 4095, 0, 2000);
 Cas = map(HodnPot, 0, 4095, 500, 2500);

// sprite1.fillSprite(TFT_BLACK);  //?????
// tft.drawArc(xC, yC, orad, irad, 85, 275, DarkGrey, DarkGrey, true);   //hranaté okraje
// sprite1.drawSmoothArc(xC, yC, orad, irad, 85, 275, TFT_BLACK, TFT_YELLOW, true); //podklad    první vnitřek, druhý okraj  Dělá jen žlutý obrys
// sprite1.drawSmoothArc(xC, yC, orad, irad, 85, 275, TFT_DARKGREY, TFT_DARKGREY, true);
// sprite1.drawSmoothArc(xC, yC, orad, irad, startAngle+HodnBar, endAngle+HodnBar, fg_color, bg_color, true);  //běžec

      sprite1.fillRect(260, 2, 43, 10, TFT_BLACK);  //
      sprite1.fillRect(260, 2, Voltage/10, 10, TFT_WHITE);
      sprite1.drawRect(260, 2, 43, 10, TFT_WHITE);  //okraj obdélníka
      sprite1.fillRect(303, 4, 4, 6, TFT_WHITE);  //okraj obdélníka
      
 
 sprite1.pushSprite(0, 0);   //umístění sprite

      tft.setTextColor(TFT_DARKGREY, TFT_BLACK);
      char bufferA [10]; 
      sprintf (bufferA, "U=%.2fV   Umin=%.2fV  ", Voltage, Voltage+10);           
      tft.drawString(String(bufferA), 0, 135, 4);

      tft.setTextColor(TFT_DARKGREY, TFT_BLACK);
      char bufferB [10]; 
      sprintf (bufferB, "I=%.1fmA   Imax=%.1fmA  ", Current, Current+20);            
      tft.drawString(String(bufferB), 0, 160, 4);


      tft.setTextColor(TFT_LIGHTGREY, TFT_BLACK);
      char bufferP [10]; 
      sprintf (bufferP, "P=%3dmW   ", Voltage+20);           
      tft.drawString(String(bufferP), 0, 185, 4);



      tft.setTextColor(TFT_GREEN, TFT_BLACK);
      char bufferC [5]; //zobrazení dat z bufferu 
      sprintf (bufferC, "%3d  ", HodnBar); 
      tft.drawString(String(bufferC), 200, 40, 7);   //font 7 - sedmisegmentovky

      tft.setTextColor(TFT_YELLOW, TFT_BLACK);
      char bufferD [7]; //zobrazení dat z bufferu 
      sprintf (bufferD, "%4dus  ",  Cas); 
      tft.drawString(String(bufferD), 210, 100, 4);   


      Serial.print(Voltage);
      Serial.print("  ");
      Serial.println(Current);
}