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Arduino D1 temperature code is not working for me. Answered

Hi, 
I'm working on a temperature( DS18B20) project with the model D1 of Arduino and I will like to connected to the internet via Blynk . I was able to configure the WiFi and the blink project. But when I try to use this code the application of Blynk say that I don't have connection with the board. I find a code that everybody is using but is not working for me.

Can you help me please?
 
This is my code:

#define BLYNK_PRINT Serial // Enables Serial Monitor
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <OneWire.h>
//EAO #include <SPI.h>





// OneWire DS18S20, DS18B20, DS1822 Temperature Example
//
// http://www.pjrc.com/teensy/td_libs_OneWire.html
//
// The DallasTemperature library can do all this work for you!
// http://milesburton.com/Dallas_Temperature_Control_Library

OneWire  ds(7);  // on pin 7 (a 4.7K resistor is necessary)
WidgetLCD lcd(V1);


// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "f7d376f1ae554207a6666c45babe7e69";
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Samsung Galaxy Note 4 0628";
char pass[] = "1234567";





void setup()
{
  Serial.begin(9600); // See the connection status in Serial Monitor
Blynk.begin(auth, ssid, pass);  // Here your Arduino connects to the Blynk Cloud.
}

void loop()
{
  Blynk.run(); // All the Blynk Magic happens here...


  // You can inject your own code or combine it with other sketches.
  // Check other examples on how to communicate with Blynk. Remember
  // to avoid delay() function!
// delay(1000);
  byte i;
  byte present = 0;
  byte type_s;
  byte data[12];
  byte addr[8];
  float celsius, fahrenheit;

  if ( !ds.search(addr)) {
    Serial.println("No more addresses.");
    Serial.println();
    ds.reset_search();
  //  delay(250);
    return;
  }

  Serial.print("ROM =");
  for ( i = 0; i < 8; i++) {
    Serial.write(' ');
    Serial.print(addr[i], HEX);
  }

  if (OneWire::crc8(addr, 7) != addr[7]) {
    Serial.println("CRC is not valid!");
    return;
  }
  Serial.println();

  // the first ROM byte indicates which chip
  switch (addr[0]) {
    case 0x10:
      Serial.println("  Chip = DS18S20");  // or old DS1820
      type_s = 1;
      break;
    case 0x28:
      Serial.println("  Chip = DS18B20");
      type_s = 0;
      break;
    case 0x22:
      Serial.println("  Chip = DS1822");
      type_s = 0;
      break;
    default:
      Serial.println("Device is not a DS18x20 family device.");
      return;
  }

  ds.reset();
  ds.select(addr);
  ds.write(0x44, 1);        // start conversion, with parasite power on at the end

//  delay(1000);     // maybe 750ms is enough, maybe not
  // we might do a ds.depower() here, but the reset will take care of it.

  present = ds.reset();
  ds.select(addr);
  ds.write(0xBE);         // Read Scratchpad

  Serial.print("  Data = ");
  Serial.print(present, HEX);
  Serial.print(" ");
  for ( i = 0; i < 9; i++) {           // we need 9 bytes
    data[i] = ds.read();
    Serial.print(data[i], HEX);
    Serial.print(" ");
  }
  Serial.print(" CRC=");
  Serial.print(OneWire::crc8(data, 8), HEX);
  Serial.println();

  // Convert the data to actual temperature
  // because the result is a 16 bit signed integer, it should
  // be stored to an "int16_t" type, which is always 16 bits
  // even when compiled on a 32 bit processor.
  int16_t raw = (data[1] << 8) | data[0];
  if (type_s) {
    raw = raw << 3; // 9 bit resolution default
    if (data[7] == 0x10) {
      // "count remain" gives full 12 bit resolution
      raw = (raw & 0xFFF0) + 12 - data[6];
    }
  } else {
    byte cfg = (data[4] & 0x60);
    // at lower res, the low bits are undefined, so let's zero them
    if (cfg == 0x00) raw = raw & ~7;  // 9 bit resolution, 93.75 ms
    else if (cfg == 0x20) raw = raw & ~3; // 10 bit res, 187.5 ms
    else if (cfg == 0x40) raw = raw & ~1; // 11 bit res, 375 ms
    //// default is 12 bit resolution, 750 ms conversion time
  }
  celsius = (float)raw / 16.0;
  fahrenheit = celsius * 1.8 + 32.0;
  Serial.print("  Temperature = ");
  Serial.print(celsius);
  Serial.print(" Celsius, ");
  Serial.print(fahrenheit);
  Serial.println(" Fahrenheit");
  Blynk.virtualWrite(V5, celsius);
  Blynk.virtualWrite(V6, celsius);
  Blynk.virtualWrite(V7, celsius);
  Blynk.virtualWrite(V8, celsius);
  lcd.clear();
  lcd.print(0, 0, "Temperature");
  lcd.print(0, 1, celsius);

}

Discussions

0
None
steveastrouk

2 years ago

Have you set up the wifi credentials correctly ?

0
None
ealemanyprsteveastrouk

Answer 2 years ago

Yes. I can turn on and off a led using the app of Blynk . That is working fine but if this code is not working.

0
None
steveastroukealemanypr

Answer 2 years ago

The Blynx app says "Avoid delay" statements, but the Onewire protocol NEEDS delays. You can't just comment them out. You probably need to find a better way to implement a delay, with something based on a timer interrupt.