/*
this sketch is adapted by niq_ro from
http://www.tehnic.go.ro
http://www.niqro.3x.ro
http://nicuflorica.blogspot.ro/
http://arduinotehniq.blogspot.com/
this sketch is made for use DS18B20 sensor(s) with ATtiny85 at 8MHz
* 3-pin Arduino interface for HD44780 LCDs via 74HC595 Shift Register
* by Rowan Simms code@rowansimms.com
* License: Creative Commons - Attribution.
* Full Documentation and Description: http://rowansimms.com/article.php/lcd-hookup-in-seconds
*
* This sketch allows Arduinos to use a shift register to control an LCD, allowing
* a reduction in pins it requires from 6 to 3 while still retaining full control
* including backlight on/off.
* This requires the use of the LiquidCrystal595 library
* available at: http://code.google.com/p/arduino-lcd-3pin/
*/
#include <LiquidCrystal595.h> // include the library
LiquidCrystal595 lcd(0,1,2); // datapin, latchpin, clockpin
#include <OneWire.h>
// http://www.pjrc.com/teensy/td_libs_OneWire.html
// http://milesburton.com/Dallas_Temperature_Control_Library
OneWire ds(3); // on phiscal pin 2 (a 4.7K resistor is necessary)
byte grad[8] = {
B01110,
B10001,
B10001,
B01110,
B00000,
B00000,
B00000,
};
int ics =0; //count number of sensor
void setup() {
lcd.begin(16,2); // 16 characters, 2 rows
lcd.createChar(0, grad);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Wow. 3 pins!");
lcd.setCursor(0,1);
lcd.print("Fabulous");
delay(2000);
lcd.clear();
// Print a message to the LCD.
lcd.setCursor(1, 0);
lcd.print("temperatura in");
lcd.setCursor(1, 1);
lcd.print("mai multe zone");
delay (2500);
lcd.clear();
}
void loop() {
byte i;
byte present = 0;
byte type_s;
byte data[12];
byte addr[8];
float celsius;
if ( !ds.search(addr)) {
lcd.clear();
lcd.setCursor(0, 1);
lcd.print("doar ");
lcd.print(ics);
lcd.print(" senzor(i)");
ds.reset_search();
delay(250);
ics=0;
return;
}
ics++;
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
for ( i = 0; i < 9; i++) { // we need 9 bytes
data[i] = ds.read();
}
// 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
}
lcd.clear();
lcd.setCursor(0, 1);
lcd.print("ROM=");
for( i = 0; i < 8; i++) {
lcd.print(' ');
lcd.print(addr[i], HEX);
}
if (OneWire::crc8(addr, 7) != addr[7]) {
lcd.print("CRC is not valid!");
return;
}
celsius = (float)raw / 16.0;
lcd.setCursor(0,0);
lcd.print("Temp");
lcd.print(ics);
lcd.print(" = ");
lcd.print(celsius);
lcd.write(byte(0));
lcd.print("C ");
delay(3000);
}
