Temperature sensor ds18b20

DS18B20 Waterproof Digital Temperature Sensor – 1-Wire Interface

Overview:

The DS18B20 Digital Temperature Sensor is a highly accurate, waterproof temperature sensor ideal for wet environments, outdoor systems, or remote sensing applications. It communicates over a 1-Wire interface, allowing multiple sensors to be connected using only one digital pin. Compatible with Arduino, ESP32, Raspberry Pi, and other microcontrollers, it’s a go-to sensor for temperature monitoring projects.

Key Features:

• Temperature Range: -55°C to +125°C

• Accuracy: ±0.5°C from -10°C to +85°C

• 1-Wire Interface: Requires only one data line for communication

• Waterproof Stainless Steel Probe – great for liquids and outdoor use

• Unique 64-bit ID – multiple sensors can be used on the same bus

• Digital Output: No ADC required

Technical Specifications:

Wiring with Arduino Uno:

🔧 Important: Use a 4.7kΩ pull-up resistor between the data line and VCC.

Arduino Code Example:

cpp
CopyEdit
#include <OneWire.h>
#include <DallasTemperature.h>

#define ONE_WIRE_BUS 2
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

void setup() {
  Serial.begin(9600);
  sensors.begin();
}

void loop() {
  sensors.requestTemperatures();
  float tempC = sensors.getTempCByIndex(0);
  Serial.print("Temperature: ");
  Serial.print(tempC);
  Serial.println(" °C");
  delay(1000);
}

Applications:

• Aquarium and hydroponic systems

• Weather stations

• Smart home HVAC control

• Industrial and food temperature monitoring

Resources:

• 📹 Video Tutorial: https://youtu.be/h8V4b-eCcPw?si=nmiYrBoy_imWOIhi