18B20 Temperature module

Euro 3.95 *Prices include VAT

Article code: ARD161
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18B20 Temperature module. Suitable for Arduino or other microcontrollers.

Example code:

Connect the signal to Arduino digital 10, and open serial port monitor:

#include

/* DS18S20 Temperature chip i/o

OneWire ds(10); // on pin 10

void setup(void) {

// initialize inputs/outputs

// start serial port

Serial.begin(9600);

}

void loop(void) {

byte i;

byte present = 0;

byte data[12];

byte addr[8];

int Temp;

if ( !ds.search(addr)) {

//Serial.print("No more addresses.n");

ds.reset_search();

return;

}

Serial.print("R="); //R=28 Not sure what this is

for( i = 0; i < 8; i++) {

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;

}

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("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(" ");

}

Temp=(data[1]<<8)+data[0];//take the two bytes from the response relating to temperature

Temp=Temp>>4;//divide by 16 to get pure celcius readout

//next line is Fahrenheit conversion

Temp=Temp*1.8+32; // comment this line out to get celcius

Serial.print("T=");//output the temperature to serial port

Serial.print(Temp);

Serial.print(" ");

Serial.print(" CRC=");

Serial.print( OneWire::crc8( data, 8), HEX);

Serial.println();

}

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18B20 Temperature module

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18B20 Temperature module

Other customers also bought:

Relay 24VDC 5 A SPST-NO OMRON OMRON G6B 1114P

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Shopping cart

Productlist

Search

Information

Relay 24VDC 5 A SPST-NO OMRON
OMRON G6B 1114P

ATMEGA 88-20
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