DFR0198

DFR0198 Datasheet

Waterproof DS18B20 Digital Temperature Sensor SKU:DFR0198

Part	Datasheet
DFR0198	DFR0198 (pdf)

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Waterproof DS18B20 Digital Temperature Sensor SKU:DFR0198 Contents • 1 Introduction Specification • 2 Sensor Connection • 3 Sample Code • 4 Additional documentation Introduction This is a waterproofed version of the DS18B20 Arduino Temperature sensor. Handy for when you need to measure something far away, or in wet conditions. While the sensor is good up to 125 the cable is jacketed in PVC so we suggest keeping it under 100 Because they are digital, you don't get any signal degradation even over long distances! The DS18B20 provides 9 to 12-bit configurable temperature readings over a 1-Wire interface, so that only one wire and ground needs to be connected from a central microprocessor.Usable with 3.0-5.5V systems. Because each DS18B20 contains a unique silicon serial number, multiple DS18B20s can exist on the same 1-Wire bus. This allows for placing temperature sensors in many different places. Applications where this feature is useful include HVAC environmental controls, sensing temperatures inside buildings,equipment or machinery, and process monitoring and control. Specification • Usable with 3.0V to 5.5V power/data • Accuracy from -10 to +85 • Usable temperature range -55 to 125 -67 to +257 • 9 to 12 bit selectable resolution • Uses 1-Wire interface- requires only one digital pin for communication • Unique 64 bit ID burned into chip • Multiple sensors can share one pin • Temperature-limit alarm system • Query time is less than 750ms • 3 wires interface: Red wire - VCC Black wire - GND Yellow wire - DATA • Stainless steel tube 6mm diameter by 35mm long • Cable diameter 4mm • Length 90cm Sensor Connection This sensor requires a 4.7K Ohm resistor between the voltage and Signal pin. as seen in the picture below. Optionally you can use a Plugable Terminal sensor adapter to help in making this connection secure. Sample Code Sample code for Arduino and above. #include <OneWire.h> int DS18S20_Pin = 2 //DS18S20 Signal pin on digital 2 //Temperature chip i/o OneWire ds DS18S20_Pin // on digital pin 2 void setup void Serial.begin 9600 ; void loop void float temperature = getTemp Serial.println temperature ; delay 100 //just here to slow down the output so it is easier to read float //returns the temperature from one DS18S20 in DEG Celsius byte data[12] byte addr[8]; if !ds.search addr //no more sensors on chain, reset search ds.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; ds.reset ds.select addr ds.write 0x44,1 // start conversion, with parasite power on at the end byte present = ds.reset ds.select addr ds.write 0xBE // Read Scratchpad for int i = 0 i < 9 i++ // we need 9 bytes data[i] = ds.read ; ds.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; Additional documentation ZIP file With sample codes, datasheet, and required libraries. 8-15-17

PDF Datasheet Preview

Waterproof DS18B20 Digital Temperature Sensor SKU:DFR0198

Contents
• 1 Introduction Specification
• 2 Sensor Connection
• 3 Sample Code
• 4 Additional documentation

Introduction

This is a waterproofed version of the DS18B20 Arduino Temperature sensor. Handy for when you need to measure something far away, or in wet conditions. While the sensor is good up to 125 the cable is jacketed in PVC so we suggest keeping it under 100 Because they are digital, you don't get any signal degradation even over long distances! The DS18B20 provides 9 to 12-bit configurable temperature readings over a 1-Wire interface, so that only one wire and ground needs to be connected from a central microprocessor.Usable with 3.0-5.5V systems. Because each DS18B20 contains a unique silicon serial number, multiple DS18B20s can exist on the same 1-Wire bus. This allows for placing temperature sensors in many different places. Applications where this feature is useful include HVAC environmental controls, sensing temperatures inside buildings,equipment or machinery, and process monitoring and control.

Specification
• Usable with 3.0V to 5.5V power/data
• Accuracy from -10 to +85
• Usable temperature range -55 to 125 -67 to +257
• 9 to 12 bit selectable resolution
• Uses 1-Wire interface- requires only one digital pin for communication
• Unique 64 bit ID burned into chip
• Multiple sensors can share one pin
• Temperature-limit alarm system
• Query time is less than 750ms
• 3 wires interface:

Red wire - VCC Black wire - GND Yellow wire - DATA
• Stainless steel tube 6mm diameter by 35mm long
• Cable diameter 4mm
• Length 90cm

Sensor Connection

This sensor requires a 4.7K Ohm resistor between the voltage and Signal pin. as seen in the picture below. Optionally you can use a Plugable Terminal sensor adapter to help in making this connection secure.

Sample Code

Sample code for Arduino and above.
#include <OneWire.h>
int DS18S20_Pin = 2 //DS18S20 Signal pin on digital 2
//Temperature chip i/o OneWire ds DS18S20_Pin // on digital pin 2
void setup void Serial.begin 9600 ;
void loop void float temperature = getTemp Serial.println temperature ;
delay 100 //just here to slow down the output so it is easier to read
float //returns the temperature from one DS18S20 in DEG Celsius
byte data[12] byte addr[8];
if !ds.search addr //no more sensors on chain, reset search ds.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;
ds.reset ds.select addr ds.write 0x44,1 // start conversion, with parasite power on at the end
byte present = ds.reset ds.select addr ds.write 0xBE // Read Scratchpad
for int i = 0 i < 9 i++ // we need 9 bytes data[i] = ds.read ;
ds.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;

Additional documentation

ZIP file With sample codes, datasheet, and required libraries.
8-15-17

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Datasheet ID: DFR0198 508666