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Usually, DHT11 requires a 10k-ohm external pull-up resistor between VCC and Digital Pin for proper interfacing. Pada aplikasi Arduino ini kita pilih pin 9. 4. Step 3: Relay to Power Supply. If you built a physical version of this circuit, you can try it out with the Arduino software's … Using a display to view the temperature and humidity of your environment can be possible using the DHT11 or DHT22 sensor with the easy to use Simply connect both the GND and VDD pins to 0V (yes both). Required Hardware. Step 1: Arduino to Relay. ... // Arduino SS_RX = pin 10 (unused), Arduino SS_TX = pin 11 . 1. We already used DS18B20 Temperature Sensor in a couple of earlier projects involving Arduino, Raspberry Pi and ESP8266. DHT11 Humidity & Temperature Sensor 1 Temperature Sensor DS18B20. The LMT01 is a high-accuracy, 2-pin temperature sensor with an easy-to-use pulse count current loop interface, which makes it suitable for onboard and offboard applications in automotive, industrial, and consumer markets. Start by connecting the +V S pin to the 5 V output of the Arduino and the GND pin to the ground. This example code for Arduino shows a quick way to create a temperature sensor, it simply prints to the serial port what the current temperature is in both Celsius and Fahrenheit. 2. It is a very cheap waterproof temperature sensor we can get from the market. 104. I want to build a thermistor temp sensor using arduino (as in above circuit) but then need to convert measured temperature in degrees centigrade to air flow in meters per second, and be able to display on screen, and record this via computer. It gives output in voltage according to the temperature. DS18B20 temperature sensor has three pins: GND pin needs to be connected to GND (0V) VCC pin needs to be connected to VCC (5V or 3.3V) DQ pin is 1-Wire Data Bus should be connected to a digital pin on Arduino. This arduino projects show how to read Celsius and Fahrenheit temperature with LM35 temperature sensor. As with the previous sensor we will make use of a library from Adafruit to use the sensor. As Arduino can only sense unipolar voltages at its analog input pins, only a basic centigrade temperature sensor can be built using the LM35 sensor. Bmp180 can monitor temperature, pressure and altitude and … Pin number 1 is connected with the Arduino’s 5 volts, pin number 3 is not connected while pin number 4 is connected with the ground. We're using the AltSoftSerial library (internally) to give the Arduino an additional serial port. Connect the Analog pin of the sensor to the A0 of the Analog of the board. Writing the code to get temperature and humidity is also simple thanks to the DHT library. Step 1: Test your sensor Take your sensor and connect the pin with the + sign to the pin labelled with 5V of the Arduino Uno. 2 libraries needed. Dht11, which can monitor temperature and humidity. The output pin of the LM335 sensor is connected to analog channel 0 (A0). After hooking it up you can download another library to simplify working with the AM2320 temperature and humidity sensor. A connection diagram is given below as well. A usable health-monitoring system is required for prolonged monitoring of the patient with reduced cost. Connect the output pin of DS18B20 Waterproof Temperature sensor to any digital pin. Only one digital pin of Arduino is required to connect several temperature sensor. Here is new test codes for Arduino temperature humidity sensor DHT11, DHT21, DHT22 test code for hardware (not shields). The LM35 has just 3 pins, 2 for the power supply and one for the analog output. sensor provides a highly precise temperature in centigrade. These two jumper wires are important as they will allow both the EZO™ RTD Temperature Circuit and the Arduino … and get instantaneous results. Let’s start by placing the yellow jumper wire into pin 2 on the Arduino Uno board. The Sensor can measure the temperature between -55 to 125°C (-67°F to +257°F). In the circuit, the sensor receives a single power supply from Arduino. TMP36 analog temperature sensor with Arduino Uno wiring diagram. In this example project we will be combining an Arduino and a DS18B20 temperature sensor. The TMP36 temperature sensor is an easy way to measure temperature using an Arduino! 1. Coming to the design, the data pin of the DHT11 Sensor is connected to the Pin 11 of Arduino. For that, you just need to wire together all the sensors data pins to an Arduino … // Connect pin 2 of the sensor to whatever your DHTPIN is // Connect pin 4 (on the right) of the sensor to GROUND // Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor // Initialize DHT sensor. To learn more about how thermistors work and how to use them on the Arduino, check out this Arduino Thermistor Temperature Sensor Tutorial. It requires only the data pin connected to the microcontroller with a pull up resistor and the other two pins are used for power as shown below. Writing the code to get temperature and humidity is also simple thanks to the DHT library. DHT11 is a low cost humidity and temperature sensor which provides high reliability and long term stability. Just repeate the wiring diagram for each sensor, connecting the data pin to any digital pin available, one pin per sensor. This is the ideal sensor for Arduino projects because it can be powered directly with 5V from the Arduino’s power pin and has only three pins (one pin is for analog output and two for power supply). These sensors contain a chip… So, a 4.7k (nearest resistor) is connected to DQ pin to power supply pin. $5.99. We developed a monitoring system using off-the-shelf components, and this tutorial will demonstrate how we soldered the electronic components for communication with an Conclusion. The data pins of LCD i.e. Place a 4.7k resistor between the positive lead (Red Wire) and the output lead (White Wire) of the sensor. The device is guaranteed to have an accuracy of 0.7C (max) from -50C to 150C and is available in the TO-92 and WSON packages. The TMP37 produces an output of 20 mV / degrees C. In the example below, I chose pins 2 and 3. The DS18B20 Waterproof Temperature Sensor is a suitable option for that because of the easy interface and high accuracy. The connections are also given in the table below: TMP36 analog temperature sensor connections. The DHT11 and DHT22 sensors provide an easy and inexpensive way to get temperature and humidity measurements with the Arduino. void getCurrentTemp (int * sign, int * whole, int * fract); char temp_string [10]; The DHT11 uses an internal thermistor and a capacitive humidity sensor to determine environment conditions, an internal chip is responsible for converting readings to a serial digital signal. The DHT11 is a digital temperature sensor that measures temperature and relative humidity. You can read the temperature of more than one sensor at the same time using just one Arduino digital pin. Here’s the complete video tutorial : Rangkaian Arduino dengan DS18B20. Handy for when you need to measure something far away, or in wet conditions. The best thing about KeeYees DHT11 is that you can operate it … DHT11 is perhaps the most popular, widely used, and reliable temperature and humidity sensor module for Arduino based projects. A relay module is controlled using the Arduino’s pin number 13. Let’s start by placing the yellow jumper wire into pin 2 on the Arduino Uno board. 2) PINOUT of LM35 Temp Sensor. Building a wired RS485 sensor network. Conclusion. Step 1: Arduino to Relay. Now place the DS18B20 sensor onto the breadboard. Step 1 - Connect the TMP102 sensor to the Arduino Hardware. Connect an LED to pin 13 or leave it because there is already a LED on your Arduino connected to pin 13. This sensor is used for sensing environment temperature which gives 1 degree temperature on every 10mV change at its output pin. This temperature sensor can detect positive centigrade temperatures from 2˚ … Dht11, which can monitor temperature and humidity. I am new to arduino.I try to read temperature using DS18B20 temperature sensor.I connected the pins as bellow.But,When I connected 1-pin to ground and 3-pin to +5V the sensor heated and all the little lights on the UNO board turned off and it stopped working. Similarly, the temperature from 0°C to 50°C with ±2.0°C accuracy. 3. Koneksi sensor suhu DS18B20 dengan Arduino UNO juga sangat mudah, cukup kaki tegangan (Vcc dan Gnd) hubungkan dengan 5V dan GND Arduino UNO kemudian kaki data out hubungkan dengan salah satu pin digital Arduino, bebas mau pin mana saja boleh. S. S OUT The pull-up resistor is used to keep the line in high state when the bus is not in use. Now the good thing is Arduino has its own inbuilt ADC. The Arduino onboard LED at pin 13 will indicate when the TMP102 reading exceeds a specified temperature threshold. In this proj… Step 4: Actuator to Relay. Since LM35 is an analog device and gives analog output, the output pin of LM35 should be connected to the ADC aka analog to digital converter first to convert the output analog signal to Digital. AM2320 Arduino Library and Sketch. A linear actuator that is controlled with a temperature and humidity sensor has many prime applications. Arduino Temperature Sensor Code. DS18B20 temperature sensor not working. Connet the VCC pin to 3.3V or 5V pin of Arduino. Connect GND of the module to GND and connect DO pin of the module to D2 pin of Arduino. Connect an LED to pin 13 or leave it because there is already a LED on your Arduino connected to pin 13. Adafruit Industries, Unique & fun DIY electronics and kits Waterproof 1-Wire DS18B20 Compatible Digital temperature sensor : ID 381 - This is a pre-wired and waterproofed (with heat shrink) version of a 1 Wire DS18B20-compatible sensor. The Red wire is connected to 5V, Black connects to ground and Yellow goes to digital pin 2 on arduino. Handy for when you need to measure something far away, or in wet conditions. Similarly, the temperature from 0°C to 50°C with ±2.0°C accuracy. Overview of DS18B20 Temperature sensor. The control pins of LCD i.e. Although the DHT11 temperature and humidity sensor isn’t the fastest temperature and humidity sensor around, it has fair level of accuracy, +-5% for humidity readings and +-2% for temperature readings. Connect GND of the module to GND and connect DO pin of the module to D2 pin of Arduino. According to 1-wire bus protocol, a 5k resistor is required which make idle state for 1-wire bus is high. The DHT11 and DHT22 sensors provide an easy and inexpensive way to get temperature and humidity measurements with the Arduino. A 4.7K pullup resistor from the data wire to 5V is very important otherwise the sensor will not work. Programming the Arduino. From the TMP36 datasheet, the temperature sensor has a scale factor of 10 mV/°C with a offset of 500mV to account for negative temperatures. Upload this sketch to your Arduino. Step 2: Temperature and Humidity Sensor to Arduino. Arduino Temperature and humidity sensor module KY-015. The TMP007 temperature sensor has 7 pins, and when the sensor is positioned with the pins on the left hand side of the board the pins are labeled VCC, Ground, SDA, SCL, Alert, AD1, and AD0. 2. The DHT11 measures temperature with a surface mounted NTC temperature sensor (thermistor) built into the unit. Analog A4 pin is the Arduino SDA line, while pin A5 is the SCL connection. The temperature sensor circuit we will build is shown below: Pin 1 of the TMP36 goes into +5V of the arduino Pin 2 of the TMP36 goes into analog pin A0 of the arduino Pin 3 of the TMP36 goes into ground (GND) of the arduino. Handy for when you need to measure something far away, or in wet conditions. Download File. The hardware part is done. A summary sensor list of used appears below: 8-11 Sensor Brand HOBO TMC6-HD Neulog NUL-234 Dallas DS18B20 Listed Temperature Range -40 to 100 C -200 to 2000 C -55 to 125 C Dimensions 5.1 by 33 mm copper capped cylinder 1.0 by 13 mm wrapped wires 4mm by 4mm by 3mm half barrel Sensor type Thermistor Thermocouple Digital A linear actuator that is controlled with a temperature and humidity sensor has many prime applications. Programming. 2pcs DHT11 Temperature Humidity Sensor Module Digital Temperature Humidity Sensor 3.3V-5V with Wires for Arduino Raspberry Pi 2 3 (2pcs DHT11) 4.3 out of 5 stars. The temperature value measured by the sensor will be stored in a 2-byte register inside the sensor. In this section, you will connect the TMP102 sensor to the Arduino board. But here i have shown connecting 3 DS18B20 Temperature Sensors to Arduino. After hooking it up you can download another library to simplify working with the AM2320 temperature and humidity sensor. 1.3 Pinout of LM 35 Temperature Sensor. Next, connect the middle pin (V OUT) to any of the analog inputs of the Arduino. Then connect the pin with the - sign to the GND pin. A 16 x 2 LCD display is used to display the results. Description: Arduino DS18B20-In this Tutorial, you will learn how to use Ds18b20 waterproof one-wire digital temperature sensor with Arduino and display the temperature in Celsius and Fahrenheit on a 16×2 LCD.So far I have covered different temperature sensors like. Connect pin2 of the TMP36 sensor to the analog input pins of Arduino using a jumper wire. After making a connection diagram, just upload the code in Arduino. Open Arduino IDE, Serial monitor to see temperature sensor values. Firstly, declare the A0 pin of Arduino as an input that will read the output voltage of the sensor. AM2320 Arduino Library and Sketch. An analog to digital converter (ADC) in the ATMEGA168 or ATMEGA328 are 10-bit (1024 steps) and over a range of 5 volts is 5.0/1024 = 4.882 mV per step. LM35 analog temperature sensor with Arduino Uno wiring diagram. int temperaturePin = 2; void setup() { //This function of the Arduino Serial library starts the serial connection with the //computer. 1.1 Electronic Brick, Waterproof and other Versions; 1.2 Links to more about the DS18B20 and other "1-Wire" chips; 1.3 How does this Work?? Temperature Measurement with a Thermistor and an Arduino Class Notes for EAS 199B Gerald Recktenwald May 25, 2013 1 Measuring the Thermistor Signal A thermistor indicates temperature by a change in electrical resistance. While some temperature sensors use an analog voltage to represent the temperature, the TMP102 uses the I 2 C bus of the Arduino to communicate the temperature. Coding Part: Coding part of this is simple. In this circuit configuration, the LM35 acts as the basic centigrade temperature sensor. For VCC use the Arduino 5V power output, and GND for ground. 1. 1. The words “digital” and “1-wire” make this sensor really cool and allows you, with a super simple setup, to read the temperature of one or more sensors. 2) Connect LM35 center lead to analog pin 1, make sure ground lead connected to ground and Vs lead to 5V pin. LM35 temperature sensor (Affiliate Aliexpress) Some wires; Breadboard (optional, if you don’t want to solder parts) (Affiliate Aliexpress) Arduino and sensor connection. In this project pin 1 is connected to +5 volts, pin 2 to the analog 0 input on the Arduino module, and pin 3 to ground. I had a bunch of sensors and things in my Starter Kit including the TMP36 Precision Temperature Sensor. Connect the 5v of the supply to the 5v of the Arduino mega board. Then connect the DQ pin to pin 2 on the Arduino board (can be any Arduino digital pin) A 4K7 ohm pullup resistor is required on the DQ pin to pull it up to 5V. Connect the TMP102 sensor to the Arduino board using the following circuit diagram: The DHT command creates the object, and we can give any name we want to it. The sensor can measure a fairly wide range of temperature (-50°C to 125°C), is fairly precise (0.1°C resolution), and is very low cost, making it a popular choice. This is ideal because we can power the sensor with the Arduino's +5 V output. The sensor’s analog output is connected to the A0 analog input pin of Arduino UNO. The sampling frequency is 0.5Hz, which means that you can get new data every two seconds. Step 3: Relay to Power Supply. 2. 3. The third pin can be ignored, it is not connected anywhere. Remember that you can use anywhere between 2.7V and 5.5V as the power supply. This sensor has three pins, the first pin is the power pin VCC, the middle pin is the signal out or DATA pin and the last pin is GND. The sensor usually has two forms: TO-92 package (looks like a transistor) and waterproof probe. set the baud rate to 9600. Programming the Arduino. RS and E (Pins 4 and 6 on LCD) are connected to pins 4 and 5 of Arduino. First, connect the 3v3 pin from the Arduino to the positive rail & a ground pin to the ground rail on the breadboard. The TMP102 is an easy-to-use digital temperature sensor from Texas Instruments. Because most Arduino boards have 5V and GND pins exposed, the sensor can be powered from these pins. If you have problems with your steel walls in your home, making radio traffic impossible, you can create a wired MySensors network using RS-485 modules connected to your Arduino. With the plastic housing removed, you can see the electrodes applied to the substrate: The wiring is very simple – you just need to connect the DHT data pin to an Arduino digital pin. February 12, 2021 Arduino celcius DS18B20 fahrenheit temperature temperature sensor. An I2C LCD is connected to arduino I2C pin which display the temperature. The wiring is very simple – you just need to connect the DHT data pin to an Arduino digital pin. See the result on Serial Monitor.... First of … These two jumper wires are important as they will allow both the EZO™ RTD Temperature Circuit and the Arduino … Analog read will take that voltage and convert it to a digital value (0 to 1023). D4 to D7 (pins 11 to 14 on LCD) are connected to pins 0 to 3 on LCD. However, the DHT11 module has built-in resistors. Result. With the plastic housing removed, you can see the electrodes applied to the substrate: To show with some concrete examples: the sensor will output 0.5V at 0°C, 0.51V at 1°C and 0.49V at -1°C. ; 1.4 Sketch to test DS18B20; 1.5 Here's the schematic diagram of the Brick:; 1.6 Sensor Connections: red (VCC), blue or white or yellow (DATA), black (GND); 1.7 Read Temperatures from multiple DS18B20 sensors on 1 Arduino Pin: It can measure humidity from 20% to 90% RH and temperature from 0 to 50 degrees Celsius. Thus is it easy to connect it with Arduino and other microcontrollers which takes only 1 GPIO pin as no other components are required except a … We can connect maximum of 1024 sensors using I2C Protocol. I ordered a standard SMD breakout adapter that provides accurate pin … 9600 is the Baud rate (9600 bits/sec) Serial.begin(9600); } void loop() { //creates the variables that we will be using float voltage, degreesC, pinValue; //stores the value that it has been read from temperature sensor pinValue = analogRead(temperaturePin); //Converts … Here is our sensor setup on a breadboard Copy Code. The DHT11 temperature and humidity sensor data pin “2” is connected with the Arduino’s pin number 12. This looks like a transistor and is very simple of connect to the Arduino. However, the DHT11 module has built-in resistors. Turns out, Adafruit's DHT library makes it super easy. It measures humidity from 20 to 80% with an accuracy of 5%. Bmp180 can monitor temperature, pressure and altitude and … Connecting the DS18B20 waterproof temperature sensor to Arduino. DHT11 can be interface with any microcontroller like Arduino, Raspberry Pi, etc. DHT11 is cheapest temperature and humidity sensor compare to another sensor. MLX90614 is IR based contactless temperature sensor that can measure the temperature of a particular object between Pinout. DHT11 is a Digital Humidity and Temperature Sensor. Following Hardware will be required to perform this LED fade in and fade out circuit. The DS18B20 temperature sensor is … With a sealed circuit, the sensor cannot be subjected to oxidation and is often used to measure the water temperature accurately. The DHT11 measures temperature with a surface mounted NTC temperature sensor (thermistor) built into the unit. Connect the GND pin or the black wire of the sensor to the GND. Arduino + LM335 sensor circuit: The LM335 sensor has 3 pins (from left to right): Pin 1 for calibration, not used in this example Pin 2: output Pin 3: GND (ground). With the plastic housing removed, you can see the electrodes applied to the substrate: The low pin-count and low power consumption make the LMT01 … Other pins to the 5V & GND pin. 1) Connect all jumper wire as shown in diagram. In this experiment, the Arduino will measure the temperature using an LM35 sensor IC. 1.2 LM 35 Temperature sensor. As it is a analog temperature sensor so the output pin of the LM35 will be connected to the Analog Input pin of Arduino. Then, place the green jumper wire into pin 3 on the Arduino Uno board. To learn more about how thermistors work and how to use them on the Arduino, check out our Arduino Thermistor Temperature Sensor Tutorial. In this Arduino programming code for temperature sensor LM35 will we print ADC value read by Arduino and then we will convert it into millivolt and print it as well. Then, place the green jumper wire into pin 3 on the Arduino Uno board. Wire up the temperature sensor so the left pin connects to the 5V voltage rail, the center pin connects to A0 on the Arduino, and the right pin connects to the GND rail. In the circuit schematic, you can see that the temperature sensor is connected to power (5 volts) and ground (0 volts) and the analog pin A0. Arduino UNO R3 INTERFACING: LM35 has three pins, pin no.1 is +Vcc, pin no.2 is Output & pin no.3 is Ground. It uses single-bus operation. DHT11. When you bought the sensor, it is very likely that a resistor 4.7k or 10k was included. The DS18B20 is a so called 1-wire digital temperature sensor. So we will use the 2 wire method. LCD Pin 13 ——————- Arduino pin D3 LCD Pin 14 ——————- Arduino pin D2 Humidity Sensor Pin -ve —— GND Humidity Sensor Pin +ve —— VCC Humidity Sensor Pin Signal — Arduino Pin D8. The DHT11 measures temperature with a surface mounted NTC temperature sensor (thermistor) built into the unit. It has 3 pins that we can easily interface with arduino. It measures humidity from 20 to 80% with an accuracy of 5%. The AM2301 / DHT21 temperature and humidity sensor consists of two sensors: A capacitive humidity sensor and a thermistor. Connect the ground pin to the board of the Gnd. DS18B20 is a digital Temperature Sensor from Maxim Integrated, which can measure temperatures in the range of -55 0 C to +125 0 C. // Note that older versions of this library took an optional third parameter to // tweak the timings for faster processors. Adafruit Industries, Unique & fun DIY electronics and kits Waterproof 1-Wire DS18B20 Compatible Digital temperature sensor : ID 381 - This is a pre-wired and waterproofed (with heat shrink) version of a 1 Wire DS18B20-compatible sensor. Its output pin is connected to the A0 analog input pin of Arduino UNO. Description: Arduino DS18B20-In this Tutorial, you will learn how to use Ds18b20 waterproof one-wire digital temperature sensor with Arduino and display the temperature in Celsius and Fahrenheit on a 16×2 LCD.So far I have covered different temperature sensors like. Usually, DHT11 requires a 10k-ohm external pull-up resistor between VCC and Digital Pin for proper interfacing. The Red wire is connected to 5V, Black connects to ground and Yellow goes to digital pin 2 on arduino. 10 mili volt per degree Celsius is the output format of this sensor. Other than these we will also display degree symbol on 16×2 LCD using char print at value 223. About the Program. 1) PINOUT of LM35 Temp Sensor. DS18B20 is one of the popular temperature sensors because it is cheap, easy to use, and also waterproof. An Arduino Nano attached to a TMP007 temperature sensor. DHT11 is a Digital Humidity and Temperature Sensor. Connect the Vcc pin or the Red wire of the sensor to the 5V supply. To learn more about how thermistors work and how to use them on the Arduino, check out our Arduino Thermistor Temperature Sensor Tutorial. Hence the new circuit diagram become something like below. And finally connect the third pin to the digital pin 2 of your Arduino. Our old guides like DHT11 with TM1637 7 segment display will not work with the new libraries. Connecting the DS18B20 waterproof temperature sensor to Arduino. The cable is jacketed in PVC. DHT11The DHT11 is a digital temperature sensor that measures temperature and relative humidity. These sensors contain a chip… Connect the signal pin or the yellow wire to the 5V through a 4.7kohm resistor and also connect this signal pin to the Digital Pin no-12 of Arduino. The DHT data pin can be connected to any microcontroller input pin. At a price of $5.33, the DHT11 has cost/performance advantages and is a relatively cheap … A 4.7K pullup resistor from the data wire to 5V is very important otherwise the sensor will not work. This module consist of a DHT11 digital humidity and temperature sensor and a 1 kΩ resistor. One leg goes to the 5V pin, the middle pin to an Arduino Analogue pin and, the other leg to the Arduino’s ground. DS18B20 Waterproof Digital Temperature Sensor: This is a pre-wired and waterproofed version of the DS18B20 sensor. DHT22 is “modern” and sensitive but more costly. This paper describes a working prototype system for real-time health-monitoring system using DS18B20 temperature sensor, Arduino Nano with micro-controller … Simply assemble the circuit as this. Sep 8, 2017 - DHT11 is a Humidity and Temperature Sensor, which generates calibrated digital output. This project is based on Arduino which communicates here with LM35 temperature sensor, 16×2 LCD display unit and leds. It is a 3 pin IC, Operated on 4 to 20 volt. Introduction. TMP36 temperature sensor. This makes it great for use as an external sensor. As with the previous sensor we will make use of a library from Adafruit to use the sensor. $5.99. TEMPERATURE SENSOR ARDUINO CODE. Step 1: Connection From Temperature Sensor To ArduinoMega2560. Gikfun DS18B20 Temperature Sensor Waterproof Digital Thermal Probe Sensor for Arduino … This sensor transmits data using a single digital pin, so it can communicate with the microcontroller using only one digital pin. In this case, I used the analog input pin A0. case, I used the analog input pin A0. A Brief Note on DS18B20 Temperature Sensor. Use It! Analog A4 pin is the Arduino SDA line, while pin A5 is the SCL connection. Due to the successful emergence of internet of things, sensor-based real-time health monitoring is getting popularized. In my case, I used Digital Pin 7 of Arduino. check readings. The LM35 is a low voltage IC which requires a power supply from +4 VDC to +20 VDC. Step 2: Temperature and Humidity Sensor to Arduino. The circuit of Interfacing DS18B20 Temperature Sensor with Arduino is shown in figure below. Step 4: Actuator to Relay. Open Serial Monitor. DS18B20 sensor manufactured by Dallas semiconductor Corp., uses only one data line (and GND) to communicate with the microcontroller thus it is also named as 1-Wire® digital temperature sensor. The Sensirion STS3x temperature sensor is a pretty small component, with a footprint of 2.5mm x 2.5mm, so needless to say it needed to be placed on a breakout board for use. Connecting the DS18B20 waterproof temperature sensor to Arduino. The Red wire is connected to 5V, Black connects to ground and Yellow goes to digital pin 2 on arduino. A 4.7K pullup resistor from the data wire to 5V is very important otherwise the sensor will not work.

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