Usare più sonde DS18B20 (Risolto)

International Italiano Software
6

Devo dire la verità, non ho capito molto.
Se volessi usare il codice riportato prima, cosa dovrei fare per impostare 3 variabili di temperatura, ognuna associata ad un sensore?

#include <OneWire.h>
#include <LiquidCrystal.h>
 

const byte PIN_SONDA1 = 2;
const byte PIN_SONDA2 = 3;
const byte PIN_SONDA3 = 4;
 
OneWire ds1(PIN_SONDA1);
OneWire ds2(PIN_SONDA2);
OneWire ds3(PIN_SONDA3);

LiquidCrystal lcd(8,9,4,5,6,7);
 
void setup(void) {
  Serial.begin(9600);
 
  lcd.begin(16, 2);
 
  lcd.setCursor(0,0);
  lcd.print("  DS18B20 LCD  ");

 
  delay( 3000 );
}
 
void loop(void) {
  float temperature = getTemp();
  Serial.println(temperature);
 
  lcd.clear(); 
  lcd.setCursor(0,0);
  lcd.print("Temperatura:   ");
  lcd.setCursor(0,1);
  lcd.print(temperature);
 
  delay(1000); //just here to slow down the output so it is easier to read
 
}
 
float getTemp(){
  //returns the temperature from one DS18B20 in DEG Celsius
 
  byte data[12];
  byte addr[8];
 
  if ( !ds1.search(addr)) {
      //no more sensors on chain, reset search
      ds1.reset_search();
      return -1000;
  }
 
  if ( OneWire::crc8( addr, 7) != addr[7]) {
      Serial.println("CRC is not valid!");
      return -1000;
  }
 
  if ( addr[0] != 0x10 && addr[0] != 0x28) {
      Serial.print("Device is not recognized");
      return -1000;
  }
 
  ds1.reset();
  ds1.select(addr);
  ds1.write(0x44,1); // start conversion, with parasite power on at the end
 
  byte present = ds1.reset();
  ds1.select(addr);    
  ds1.write(0xBE); // Read Scratchpad
 
  for (int i = 0; i < 9; i++) { // we need 9 bytes
    data[i] = ds1.read();
  }
 
  ds1.reset_search();
 
  byte MSB = data[1];
  byte LSB = data[0];
 
  float tempRead = ((MSB << 8) | LSB); //using two's compliment
  float TemperatureSum = tempRead / 16;
 
  return TemperatureSum;
 
}