Monitor Suhu Sensor DS18b20 Interface 7segment
Pada kesempatan kali ini saya akan menjelaskan mengenai bagaimana cara membuat sebuah alat yang dapat mengukur suhu suatu benda atau ruangan sekitar dengan menggunakan sensor ds18b20 water proof. alat ini dilengkapi dengan interface 7segment sehingga memudahkan user melihat nilai yang dideteksi oleh sensor. untuk lebih jelasnya berikut adalah program dan komponennya.
a. Arduino Uno
b. Sensor Suhu DS18B20
c. Interface 7Segment
d. Program Arduino IDE
#include <Wire.h>
#include <OneWire.h>
OneWire ds(10); //output ds18b20 ke pin 10 arduino
byte i;
byte present = 0;
byte type_s;
byte data[12];
byte addr[8];
int celsius, fahrenheit;
byte zero = B00000011;
byte one = B10011111;
byte two = B00100101;
byte three = B00001101;
byte four = B10011001;
byte five = B01001001;
byte six = B01000001;
byte seven = B00011111;
byte eight = B00000001;
byte nine = B00001001;
int latchPin = 4; //Pin connected to STR(pin 1) of HEF4094
int clockPin = 3; //Pin connected to CLK(pin 3) of HEF4094
int dataPin = 2; //Pin connected to D(pin 2) of HEF4094
int oe = 5; //Pin connected to OE(pin 2) of HEF4094
int temp;
int x = 5;
int y;
int sensorValue;
void setup(){
Serial.begin(9600);
pinMode(latchPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(dataPin, OUTPUT);
pinMode(oe, OUTPUT);
digitalWrite(oe,HIGH);
}
void loop(){
if ( !ds.search(addr)) {
ds.reset_search();
delay(250);
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
present = ds.reset();
ds.select(addr);
ds.write(0xBE);
for ( i = 0; i < 9; i++) { // we need 9 bytes
data[i] = ds.read();
}
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;
temp = celsius;
int ribuan = temp / 1000;
temp = temp % 1000;
int ratusan = temp / 100;
temp = temp % 100;
int puluhan = temp / 10;
int satuan = temp % 10;
switch(ratusan){
case 0:
ratusan = zero;
break;
case 1:
ratusan = one;
break;
case 2:
ratusan = two;
break;
case 3:
ratusan = three;
break;
case 4:
ratusan = four;
break;
case 5:
ratusan = five;
break;
case 6:
ratusan = six;
break;
case 7:
ratusan = seven;
break;
case 8:
ratusan = eight;
break;
case 9:
ratusan = nine;
break;
}
switch(puluhan){
case 0:
puluhan = zero;
break;
case 1:
puluhan = one;
break;
case 2:
puluhan = two;
break;
case 3:
puluhan = three;
break;
case 4:
puluhan = four;
break;
case 5:
puluhan = five;
break;
case 6:
puluhan = six;
break;
case 7:
puluhan = seven;
break;
case 8:
puluhan = eight;
break;
case 9:
puluhan = nine;
break;
}
switch(satuan){
case 0:
satuan = zero;
break;
case 1:
satuan = one;
break;
case 2:
satuan = two;
break;
case 3:
satuan = three;
break;
case 4:
satuan = four;
break;
case 5:
satuan = five;
break;
case 6:
satuan = six;
break;
case 7:
satuan = seven;
break;
case 8:
satuan = eight;
break;
case 9:
satuan = nine;
break;
}
digitalWrite(latchPin, HIGH); //Pull latch HIGH to send data
shiftOut(dataPin, clockPin, LSBFIRST, satuan);
shiftOut(dataPin, clockPin, LSBFIRST, puluhan);
shiftOut(dataPin, clockPin, LSBFIRST, ratusan);
digitalWrite(latchPin, LOW); //Pull latch HIGH to send data
delay(1000);
}
e. VIDEO HASILNYA
