Overview

This project demonstrates a simple temperature monitoring system using ESP32 and a digital temperature sensor.

The system reads temperature data and prints it to the Serial Monitor every 2 seconds.

Components Used

• ESP32 Dev Module
• DS18B20 Temperature Sensor
• 4.7k Pull-up Resistor
• Breadboard
• Jumper Wires

Working Principle

The DS18B20 sensor communicates with the ESP32 using the OneWire protocol.

The ESP32 reads temperature data and processes it in real-time.

Circuit Connection

• VCC → 3.3V
• GND → GND
• Data → GPIO 4
• 4.7k resistor between Data and VCC

Code Snippet

“`cpp

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

#define ONE_WIRE_BUS 4

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

void setup() {
Serial.begin(115200);
sensors.begin();
}

void loop() {
sensors.requestTemperatures();
Serial.println(sensors.getTempCByIndex(0));
delay(2000);
}

Results

The temperature values are printed continuously on the Serial Monitor.

The system can be extended to log data or send readings over WiFi.