Problem on arduino help us please

Projects Programming
1

I am currently french students, my group project and I meet a problem with a code on Arduino. We use a temperature sensor and humidity named "Sensirion Sht7x" and a CO2 sensor named T6615
Indeed, in our program, we have established libraries that are "Sensirion.h" for our sensor and "ColorLCDShield.h" to display local data on an LCD (Arduino Shield) screen
here is our code

#include <ColorLCDShield.h>

#include <Sensirion.h>

#define BACKGROUND  BLACK  
#define C_COLOR  RED  
#define H_COLOR  BLUE  

#define M_COLOR  GREEN 
#define S_COLOR  YELLOW
#define W_COLOR  WHITE

LCDShield lcd;

int recu;
byte envoye;
int test;
char affichageco2 [16];
char affichagetemperature [16];

char affichagehumidite [16];
char mystring[] = "CO2";
char mystring1[] = "Temperature";
char mystring2[] = "Humidite";

char assignationresult;
//Temperature
const uint8_t dataPin =  9;            
const uint8_t sclkPin =  8;            

const uint8_t ledPin  = 13;            
const uint32_t TRHSTEP   = 5000UL;       
const uint32_t BLINKSTEP =  250UL;     

Sensirion sht = Sensirion(dataPin, sclkPin);
uint16_t rawData;
float temperature;
float humidity;

float dewpoint;
 
byte ledState = 0;
byte measActive = false;
byte measType = TEMP;

 
unsigned long trhMillis = 0;            
unsigned long blinkMillis = 0;



void setup()
{
  Serial.begin(9600);
  lcd.init(PHILIPS);
  lcd.contrast(0);

  lcd.clear(BACKGROUND);
  //Temperature
  pinMode(ledPin, OUTPUT);
  delay(15);                             

  sht.measTemp(&rawData);                
  temperature = sht.calcTemp(rawData);
  sht.measHumi(&rawData);                

  humidity = sht.calcHumi(rawData, temperature);
  dewpoint = sht.calcDewpoint(humidity, temperature);
  logData();
  //

  afficheText();
}

void loop()
{
  envoye=0xFF;

  Serial.write(envoye);
  envoye=0xFE;
  Serial.write(envoye);
  envoye=0x02;
  Serial.write(envoye);

  envoye=0x02;
  Serial.write(envoye);
  envoye=0x03;
  Serial.write(envoye);
  assignationresult = Serial.read();

  assignationresult = Serial.read();
  assignationresult = Serial.read();
  assignationresult = Serial.read();
  sprintf (affichageco2, "%d", assignationresult);

  assignationresult = Serial.read(); 
  sprintf (affichageco2, "%d", assignationresult);
  //////Temperature

  unsigned long curMillis = millis();
  // Rapidly blink LED.  Blocking calls take too long to allow this.

  if (curMillis - blinkMillis >= BLINKSTEP) {  // Time to toggle the LED state?
    ledState ^= 1;
    digitalWrite(ledPin, ledState);

    blinkMillis = curMillis;
  }
 
  // Demonstrate non-blocking calls
  if (curMillis - trhMillis >= TRHSTEP) {     

    measActive = true;
    measType = TEMP;
    sht.meas(TEMP, &rawData, NONBLOCK);        
    trhMillis = curMillis;

  }
  if (measActive && sht.measRdy()) {          
    if (measType == TEMP) {                    
      measType = HUMI;

      temperature = sht.calcTemp(rawData);     
      sht.meas(HUMI, &rawData, NONBLOCK);      
    } else {
      measActive = false;

      humidity = sht.calcHumi(rawData, temperature);
      dewpoint = sht.calcDewpoint(humidity, temperature);
      logData();

    }
  }
  //
  
  afficheText();
  delay(1000);

}

//Temperature
void logData() {
  Serial.print("Temperature = ");   Serial.print(temperature);

  Serial.print(" C, Humidity = ");  Serial.print(humidity);
  Serial.print(" %, Dewpoint = ");  Serial.print(dewpoint);
  Serial.println(" C");

}
//

void afficheText()
{
  lcd.setStr(mystring, 0, 50, W_COLOR, BACKGROUND);

  lcd.setStr(affichageco2, 20, 50, W_COLOR, BACKGROUND);
  lcd.setStr(mystring1, 40, 22, W_COLOR, BACKGROUND);
  lcd.setStr(affichagetemperature, 60, 50, W_COLOR, BACKGROUND);

  lcd.setStr(mystring2, 80, 32, W_COLOR, BACKGROUND);
  lcd.setStr(affichagehumidite, 100, 50, W_COLOR, BACKGROUND);
}

It is because of this line that we're stuck ""Sensirion sht = Sensirion(dataPin, sclkPin);"
I'll explain when we this line, there is no error, only the LCD screen does not light up but we can see our data in the monitor directly to Arduino. When we remove all rows for the sensor temperature and humidity display lights up but there is no data unfortunately.

2

Vague descriptions of the hardware are no good. Links are.

Which pins does your LCD shield use? Are you CERTAIN that they are not the same pins you are trying to connect the sensor to?

3

My guess is that there should not be an "=" on that line. Try deleting it.

...R

4

I noticed that this

  assignationresult = Serial.read();

occurs repeatedly without checking that there is something available (Serial.available()).

Furthermore, the result is thrown away by doing this multiple times.

This line

Sensirion sht = Sensirion(dataPin, sclkPin);

looks correct to me IF the wiring matches.