NodeMCU ile Webserver ile Sıcaklık Takibi

Bugün elime 18b20 geçti ve NodeMCU yu kullanarak Networku kullanarak evin herhangi bir yerinde sıcaklık takibini yapmaya karar verdim.

Projemizde kullandığımız OneWire 18B20 Dallas sensörü ile sıcaklık ölçülecek ve bu sıcaklık NodeMCU ile Kablosuz bağlantı ile ağa bağlanarak ortamın sıcaklığını gösterecek .

Kullanılan Malzemeler

  1. ESP8266 tabanlı NodeMCU, WeMos
  2. 18B20 Dallas ısı sensörü

Bağlantı şeması aşağıdaki gibidir.

DS18B20 ve NodeMCU

Bağlantıları yaptıktan sonra alttaki programı ESP8266 tabanlı geliştirme kartınıza yükleyin

#include <ESP8266WiFi.h>
#include <OneWire.h>

const char* ssid     = "xxxxxxxxxxxxx"; // Your ssid
const char* password = "xxxxxxxxxxxxx"; // Your Password

OneWire  ds(4);  // on pin 2 (a 4.7K resistor is necessary)
WiFiServer server(80);

void setup() {
Serial.begin(9600);
delay(20);

// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);

WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");

// Start the server
server.begin();
Serial.println("Server started");

// Print the IP address
Serial.println(WiFi.localIP());
}

void loop() {

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();

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");

WiFiClient client = server.available();
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close");  // the connection will be closed after completion of the response
client.println("Refresh: 5");  // refresh the page automatically every 5 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.print("<p style='text-align: center;'>&nbsp;</p>");
client.print("<p style='text-align: center;'><span style='font-size: x-large;'><strong>NodeMCU and DS18B20 Temperature Sensor Server</strong></span></p>");
client.print("<p style='text-align: center;'><span style='font-size: x-large;'><strong>https://www.youtube.com/channel/UClENA8btEm_NG0o2Jehq8sg</strong></span></p>");
client.print("<p style='text-align: center;'><span style='color: #0000ff;'><strong style='font-size: large;'>Temperature = ");
client.println(celsius);
client.print("</strong></span><h style='text-align: center;'><span style='color: #0000ff;'><strong style='font-size: large;'><sup>o</sup>C</strong></span></h></p>");
client.print("<p style='text-align: center;'>&nbsp;</p>");
client.print("<p style='text-align: center;'>&nbsp;</p>");
client.print("<p style='text-align: center;'>&nbsp;");
client.print("</p>");
client.println("</html>");
delay(5000);
}

Boş zamanlarda arduino ile uğraşan kendi halinde bir Öğretmen.

  

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