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    Bos Video

    @Bos Video

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    Latest posts made by Bos Video

    • NExtion and I2C

      He i have Nextion screen. I need show on Nextion data from I2C sensors.. I have ESP8266 devkit. Here is my sketch but this sketch no showing temp and hum on the Nextion. I need alternative wire.h. ? Thanks.

      #include <ESP8266WiFi.h>
      #include <BlynkSimpleEsp8266.h>
      #include <SimpleTimer.h>
      #include <DHT.h>
      
      #include <Wire.h>
      #include <SI7021.h>
      float temp, hum;
      bool SI7021_present = true;
      #define I2C_SCL 12      // Barometric Pressure Sensor (BMP085)
      #define I2C_SDA 13
      SI7021 sensor;
      
      #include <Nextion.h>
      #include <SoftwareSerial.h>
      
      #define DHTPIN 2 //D4
      #define DHTTYPE DHT22   // DHT 22 Change this if you have a DHT11
      DHT dht(DHTPIN, DHTTYPE);
      
      // You should get Auth Token in the Blynk App.
      // Go to the Project Settings (nut icon).
      char auth[] = "";  // Put your Auth Token here. (see Step 3 above)
      
      SoftwareSerial HMISerial(4,5,false,256);//RX-D1 , TX-D2
      Nextion myNextion(HMISerial, 9600);
      
      SimpleTimer timer;
      
      void setup()
      {
       Wire.begin();
        sensor.begin(SDA,SCL);
        Wire.begin(I2C_SDA, I2C_SCL);
        
        Serial.begin(9600); // See the connection status in Serial Monitor
        Blynk.begin(auth, "", ""); //insert here your SSID and password
      
        myNextion.init();
       
        // Setup a function to be called every second
        timer.setInterval(10000L, sendUptime);
      }
      
      void sendUptime()
      {
        // You can send any value at any time.
        // Please don't send more that 10 values per second.
         //Read the Temp and Humidity from DHT
        float h = dht.readHumidity();
        float t = dht.readTemperature();
        
        Blynk.virtualWrite(12, t); // virtual pin 
        Blynk.virtualWrite(13, h); // virtual pin 
      
      
       float temperature = sensor.getCelsiusHundredths()/100;
       float humidity = sensor.getHumidityPercent();
       Blynk.virtualWrite(5, temperature); 
       Blynk.virtualWrite(6, humidity); // virtual pin
      
      
        myNextion.setComponentText("t1", String(temperature));
        myNextion.setComponentText("t2", String(humidity));
        myNextion.setComponentText("t3", String(t));
        myNextion.setComponentText("t4", String(h));
        delay(1000);
      
        String dim = "dim=50";         //pro podsvíceni 
        myNextion.sendCommand(dim.c_str()); //pro podsvícení
      
      }
      
      
      
      void loop()
      {
        Blynk.run();
        timer.run();
      }
      
      posted in Hardware
      Bos Video
      Bos Video