Sender

#define BMP_FILENAME "/octocat2.bmp" // 456x240@16bit
#define GIF_FILENAME "/joel2.gif"

#include <HardwareSerial.h>
#include <Arduino_GFX_Library.h>

#define GFX_BL 5 // default backlight pin, you may replace DF_GFX_BL to actual backlight pin


#if defined(DISPLAY_DEV_KIT)
Arduino_GFX *gfx = create_default_Arduino_GFX();
#else /* !defined(DISPLAY_DEV_KIT) */

Arduino_DataBus *bus = new Arduino_ESP32SPI(5 /* DC */, 22 /* CS */, 18 /* SCK */, 23 /* MOSI */, GFX_NOT_DEFINED /* MISO */, VSPI /* spi_num */);

Arduino_GFX *gfx = new Arduino_GC9A01(  bus, 4 /* RST */, 0 /* rotation */, true /* IPS */);

#endif /* !defined(DISPLAY_DEV_KIT) */

  #if defined(ESP32)
  #include <FFat.h>
  #include <LittleFS.h>
  #include <SPIFFS.h>
  #include <SD.h>
  #endif

float boostPressure;
int boostMax      =     0;
int boostMax2     = boostMax;
int boostMin      =     0;
//int boostMin1     =    0;
int ypos          =   128;
int adcval        =     0;
int adcval2        =     0;
int atmo          =     0;

// int offset = 1177; // low pressure calibration

int offset = 1191; // low pressure calibration


int span = 3685.5; // high pressure calibration

unsigned long startMillis;
unsigned long currentMillis;
const unsigned long period = 100;

unsigned long startMillis2;
unsigned long currentMillis2;
const unsigned long period2 = 1000;

long myTimer = 0;
long myTimeout = 15000;


#define wert1 4095                        //b
#define wert2 0                           //c
#define temp1 -40   //Grad Celsius/10     //d
#define temp2 130 //Grad Celsius/10       //e

#define Black           0x0000      /*   0,   0,   0 */
#define Navy            0x000F      /*   0,   0, 128 */
#define DarkGreen       0x03E0      /*   0, 128,   0 */
#define DarkCyan        0x03EF      /*   0, 128, 128 */
#define Maroon          0x7800      /* 128,   0,   0 */
#define Purple          0x780F      /* 128,   0, 128 */
#define Olive           0x7BE0      /* 128, 128,   0 */
#define LightGrey       0xC618      /* 192, 192, 192 */
#define DarkGrey        0x7BEF      /* 128, 128, 128 */
#define Red             0xF800      /*   0,   0, 255 */
#define Green           0x07E0      /*   0, 255,   0 */
#define Cyan            0x07FF      /*   0, 255, 255 */
#define Blue            0x001F      /* 255,   0,   0 */
#define Magenta         0xF81F      /* 255,   0, 255 */
#define Yellow          0xFFE0      /* 255, 255,   0 */
#define White           0xFFFF      /* 255, 255, 255 */
#define Orange          0xFD20      /* 255, 165,   0 */
#define GreenYellow     0xAFE5      /* 173, 255,  47 */
#define Not             0xAC27      /*   4,  40,  71 */
#define Pink            0xF81F


#include "gif.h"

#include "bmp.h"

void display_meter(float scale, int analogval, uint16_t color )
{
  const int outerpoint = 76; // outer triangle point, distance form center
  const int innerpoint = 58;// inner triangle point, distance form center
  const int trianglewidth = 3; // width of triangle in center, in degree
  const int centerx = 120;
  const int centery = 120;
  byte x0 = 120;
  byte y0 = 120;


  //  float angle  = (PI / 4095) * (analogval - 80); // map analog in 0,1023, to 0.00,3.14
  float angle  = (PI / 257) * (analogval + 68); // map analog in 0,1023, to 0.00,3.14


  // outer triangle point
  int xout = centerx - outerpoint * cos (angle);
  int yout = centery - outerpoint * sin (angle);

  //inner triangle points
  int xinner1 = x0 + innerpoint * cos (angle + trianglewidth);
  int yinner1 = y0 + innerpoint * sin (angle + trianglewidth);

  int xinner2 = centerx + innerpoint * cos (angle - trianglewidth);
  int yinner2 = centery + innerpoint * sin (angle - trianglewidth);

  gfx->fillTriangle(xout, yout, xinner1, yinner1, xinner2, yinner2, color);
}

void display_meter2(float scale, int analogval, uint16_t color )
{
  const int outerpoint = 76; // outer triangle point, distance form center
  const int innerpoint = 58;// inner triangle point, distance form center
  const int trianglewidth = 3; // width of triangle in center, in degree
  const int centerx = 120;
  const int centery = 120;
  byte x0 = 120;
  byte y0 = 120;

  float angle  = (PI / 257) * (analogval + 68); // map analog in 0,1023, to 0.00,3.14
  int xout = centerx - outerpoint * cos (angle);
  int yout = centery - outerpoint * sin (angle);

  //inner triangle points
  int xinner1 = x0 + innerpoint * cos (angle + trianglewidth);
  int yinner1 = y0 + innerpoint * sin (angle + trianglewidth);

  int xinner2 = centerx + innerpoint * cos (angle - trianglewidth);
  int yinner2 = centery + innerpoint * sin (angle - trianglewidth);

  gfx->fillTriangle(xout, yout, xinner1, yinner1, xinner2, yinner2, color);
}


HardwareSerial Sender(1);   // Define a Serial port instance called 'Sender' using serial port 1

#define Sender_Txd_pin 17
#define Sender_Rxd_pin 16


void setup()
{
  Serial.begin(115200);
    Sender.begin(115200, SERIAL_8N1, Sender_Txd_pin, Sender_Rxd_pin); // Define and start Sender serial port
  gfx->begin();

  gif();
  //bmp();


}
void loop() {

float testvalue = 50;
 Sender.print(testvalue);
  maxboost();
  tempSensor();


  currentMillis = millis();
  if (currentMillis - startMillis >= period) {
    startMillis = currentMillis;
    readSensorData();

    display_meter(0, adcval, Black); //remove old line
    if (adcval > 1)
      display_meter(0, adcval - 1, Black); //remove old line
    display_meter(0, adcval + 1, Black); //remove old line
    display_meter(0, adcval - 2, Black); //remove old line
    display_meter(0, adcval + 2, Black); //remove old line

    adcval = boostPressure; //get new adcval
    display_meter(0, adcval, White); //draw new white line
    if (adcval > 1)display_meter(0, adcval - 1, White); //draw new white line
    display_meter(0, adcval + 1, White); //draw new white line




    int x21 = 0;



    if (boostPressure <  0) x21 = 86;
    else if (x21 = 98);

    if (boostPressure >= 0 )    gfx->setTextSize(2); gfx->setCursor(86, 95); gfx->setTextColor(0x0000); gfx->print("-");

    char cstr[6];
    dtostrf((float)boostPressure / 100.1 , 1, 2, cstr);

    gfx->setTextColor(White, Black );
    gfx->setCursor(x21, 95);
    gfx->setTextSize(2);
    gfx->print(cstr);

    dtostrf((float)boostMax / 100.1, 1, 2, cstr);

    gfx->setCursor(100, 135);
    gfx->print(cstr);


  }
}


void readSensorData(void) {

  float absolutePressure = ((analogRead(15) + analogRead(15) + analogRead(15) + analogRead(15) + analogRead(15) + analogRead(15) + analogRead(15) + analogRead(15) + analogRead(15) + analogRead(15)) / 10);
  boostPressure = ((absolutePressure - offset) * 3 / 2511.5) * 100.1;

  if (boostPressure > boostMax) boostMax = boostPressure;
  if (boostPressure < boostMin) boostMin = boostPressure;

}
void maxboost(void) {

  if (boostMax > 100) {
    adcval2 = boostMax; //get new adcval
    display_meter2(0, adcval2, Red); //draw new white line
    if (adcval2 > 1)
      display_meter2(0, adcval2 - 1, Red); //draw new white line
    display_meter2(0, adcval2 + 1, Red); //draw new white line
  }
  if (boostPressure < boostMax); {
    if (millis() > myTimeout + myTimer ) {
      myTimer = 0;
      myTimer = millis();
      display_meter2(0, adcval2, Black); //remove old line
      if (adcval2 > 1)
        display_meter2(0, adcval2 - 1, Black); //remove old line
      display_meter2(0, adcval2 + 1, Black); //remove old line
      display_meter2(0, adcval2 - 2, Black); //remove old line
      display_meter2(0, adcval2 + 2, Black); //remove old line
      boostMax = 0;
    }
  }
}

void tempSensor (void) {

  currentMillis2 = millis();
  if (currentMillis2 - startMillis2 >= period2) {
    startMillis2 = currentMillis2;
    int temp;
    int tempOut;
    int analogValue = analogRead(13);
    analogValue = map(analogValue, wert1, wert2, temp1, temp2);

    temp = analogValue * 100.1;
    tempOut = temp / 100.1;

    Serial.print("Temperatur: ");
    Serial.println((tempOut), 1);
    Serial.print(" Messwert: ");
    Serial.println(analogRead(13));


    gfx->setTextColor(White, Black );
    gfx->setCursor(100, 190);
    gfx->setTextSize(2);
    gfx->print((tempOut), 1); gfx->setTextSize(1); gfx->print("o"); gfx->setTextSize(2); gfx->print("C");
  }
}