ESP 12E devkit with Nextion Screen 3.5

Solved
61

I have too sketch :

   #define CO2_RX D2

SoftwareSerial SerialCO2(CO2_RX, CO2_TX); // RX, TX

But i dont know if it will be working with Nextion …

62

Ok here is;

#define BLYNK_PRINT Serial    
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h>

#include <Wire.h>
#include <SoftwareSerial.h>;
#include <Nextion.h>
#include <SI7021.h>

#include <Adafruit_BMP085.h>

#include <BH1750.h>  
BH1750 lightMeter;

float temp, hum;
bool SI7021_present = true;

//#define I2C_SCL 5   //D1
//#define I2C_SDA 4      //D2                                                                                                                                                                       //D4
SI7021 sensor;
Adafruit_BMP085 bmp;

float dst, bt, bp, ba;
char dstmp[20], btmp[20], bprs[20], balt[20];
bool bmp085_present = true;

// MH-Z19:
// power - 5v
 //D4 - TX sensor, D3 - RX sensor
//#define CO2_TX D4      
//#define CO2_RX D3

//SoftwareSerial co2Serial(CO2_TX, CO2_RX);

SoftwareSerial HMISerial(12,14,false,256);//RX-D1 5 , TX-D2 6
Nextion myNextion(HMISerial, 9600);



char auth[] = "";  // Put your Auth Token here. (see Step 3 above)

SimpleTimer timer;

void setup()
{
  Serial.begin(9600); // See the connection status in Serial Monitor
  Blynk.begin(auth, "", ""); //insert here your SSID and password
  sensor.begin(4,5);
  Wire.begin(4,5);
  
  delay(10);
if (!bmp.begin()) {
  Serial.println("Could not find a valid BMP085 sensor, check wiring!");
  //while (1) {}
  }
  // Setup a function to be called every second
 
  timer.setInterval(10000L, sendUptime);
  lightMeter.begin();
//  co2Serial.begin(9600);
  //co2Serial.flush();

  myNextion.init();
  String dim = "dim=50";         //pro podsvíceni 
  myNextion.sendCommand(dim.c_str());
}

/*int readCO2()
{

  byte cmd[9] = {0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79};
  char response[9];

  co2Serial.write(cmd, 9); //request PPM CO2
  co2Serial.readBytes(response, 9);
  
  byte crc = 0;
  for (int i = 1; i < 8; i++)
  {
    crc += response[i];
  }
  crc = 255 - crc;
  crc++;

  if (response[8] != crc)
  {
    Serial.println("Wrong crc from co2 sensor!");
    return -1;
  }
  if (response[0] != 0xFF)
  {
    Serial.println("Wrong starting byte from co2 sensor!");
    return -1;
  }
  if (response[1] != 0x86)
  {
    Serial.println("Wrong command from co2 sensor!");
    return -1;
  }
  int responseHigh = (int) response[2];
  int responseLow = (int) response[3];
  int ppm = (256 * responseHigh) + responseLow;
  return ppm;
}*/
void sendUptime()
{
  //int co2_ppm = readCO2();
  //Blynk.virtualWrite(1, co2_ppm); // virtual pin 

float temperature = sensor.getCelsiusHundredths()/100;
float humidity = sensor.getHumidityPercent();
Blynk.virtualWrite(5, temperature); 
Blynk.virtualWrite(6, humidity); // virtual pin


  int16_t lux = lightMeter.readLightLevel();
  Blynk.virtualWrite(4, lux);

  int bp =  bmp.readPressure();
 Blynk.virtualWrite(9,(float)bp/100,2);

  //float ba =  bmp.readAltitude();
  //Blynk.virtualWrite(7, ba); 

  float bt =  bmp.readTemperature();
  Blynk.virtualWrite(12, bt); 

  float dst =  bmp.readSealevelPressure(520)/100;
  Blynk.virtualWrite(13, dst); 


  myNextion.setComponentText("t5", String(lux));
  myNextion.setComponentText("t2", String(bp));
  myNextion.setComponentText("t1", String(dst));

  myNextion.setComponentText("t3", String(temperature));
  myNextion.setComponentText("t4", String(humidity));
  //myNextion.setComponentText("t0", String(co2_ppm));
  delay(1000);
}
void loop()
{
  Blynk.run();
  timer.run();
}
63

Wow so many different sketches. I just start checking one and you send another.

I’ll leave it with you for 48 hours or so until you decide what you are trying to do.

64

I need only add CO2 sensor to my last sketch…
Can i have together;?

SoftwareSerial HMISerial(12,14,false,256);//RX-D1 5 , TX-D2 6
Nextion myNextion(HMISerial, 9600);

and

//D4 - TX sensor, D3 - RX sensor
#define CO2_TX D4      
#define CO2_RX D3

SoftwareSerial co2Serial(CO2_TX, CO2_RX);

co2Serial.begin(9600);
co2Serial.flush();

thanks

65

You can’t have this duplication.
Do you have a link to the CO2 sensor you are using?

66

MH-Z19

http://electronics.stackexchange.com/questions/262473/mh-z19-co2-sensor-giving-diferent-values-using-uart-and-pwm

67

But this : sensor.begin(4,5);
Wire.begin(4,5); is me working…

68

So all right. SoftwareSerial co2Serial(CO2_TX, CO2_RX);

SoftwareSerial HMISerial(12,14,false,256);//RX-D 5 , TX-D 6
Nextion myNextion(HMISerial, 9600);

this together working good. THank you for
your answers :slight_smile: