pierreyves258:
Non ça ne marche pas (~26000°C :D)
Mais je ne comprend pas pourquoi un tableau de 12 parce que de toute façon la boucle d’écriture du tableau fais 9 tour ...
for ( i = 0; i < 9; i++)
data = ds.read();
[/quote]
re
voir
Electronique/Hardware/Sensors/DS18x20/Arduino — Ordinoscope.net
```
*#include <OneWire.h>
/* DS18S20 Temperature chip i/o */
OneWire ds(10); // on pin 10
int t1 ;
void setup(void) {
Serial.begin(9600);
pinMode(13, OUTPUT);
}
void loop(void) {
byte i;
byte present = 0;
byte data[12];
byte addr[8];
if ( !ds.search(addr)) {
Serial.print("No more addresses.\n");
ds.reset_search();
delay(250);
return;
}
Serial.print("R=");
for( i = 0; i < 8; i++) {
if (addr[i] < 16) Serial.print("0");
Serial.print(addr[i], HEX);
Serial.print(" ");
}
if ( OneWire::crc8( addr, 7) != addr[7]) {
Serial.print("CRC is not valid!\n");
return;
}
if ( addr[0] > 0x28) {
Serial.print("Device is not a DS18S20 family device.\n");
return;
}
// The DallasTemperature library can do all this work for you!
ds.reset();
ds.select(addr);
ds.write(0x44,1); // start conversion, with parasite power on at the end
delay(800); // 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("P=");
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.print(" ");
int temp = data[0]/2;
Serial.print(temp, DEC);
t1=temp % 2;
Serial.print(",");
Serial.print(t1*5,DEC);
Serial.println();
digitalWrite(13, HIGH); // set the LED on
delay(100); // for blink on activity
digitalWrite(13, LOW); // set the LED off
}*
```
je sais ^^ mais je comprend pas trop comment lire la valeur en 9 bits...