Arduino D1 temperature code is not working for me.
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);
}
Comments
4 years ago
Have you set up the wifi credentials correctly ?
Answer 4 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.
Answer 4 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.