Raspberry Pi DS18B20 Temperature Sensor Tutorial

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Raspberry Pi DS18B20 Temperature Sensor Tutorial
Find out how to set up and program the DS18B20 digital temperature sensor on the Raspberry Pi. The nice thing about the DS18B20 is that it only needs one wire to send data to the Pi. I'll show you how to set it up so that it outputs temperature data to an SSH terminal, then I'll show you how to output the readings to an LCD display.
Get a DS18B20 here: www.amazon.com/gp/product/B00...
The full tutorial with diagrams and code can be found on the Circuit Basics blog here: www.circuitbasics.com/raspber...
Check out the Circuit Basics blog for articles and tutorials on the Raspberry Pi, Arduino and other DIY electronic projects! www.circuitbasics.com
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29 апр 2016

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Комментарии : 157

@scorpio1155 2 года назад

Worked perfectly! This video presentation should be used as a template for learning to post excellent, helpful, easy to understand content. Thank you.

@michaelhenderson5098 6 лет назад

Thank you sir for the cool tutorial. I have the sensor attached to a RaspberryPi ZeroW mounted in my garage. It uses mqtt to report the temperature to a Raspberry Pi 3B+ with Home Assistant installed on it. My code was working perfectly, but the readout was, on occasion, many decimal places. Your code for formatting the display to 1 decimal place worked perfect. Thanks again. I have been a subscriber for awhile now and enjoy your videos.

@anasqureshi113 2 года назад

Can you share the code plzz?

@mayhemsmiley 7 лет назад

Dude, thank you so much. Searched all over the web to overcome the error I was getting. Followed your instructions and it works :) TY TY

@danielking4329 3 года назад

yo me too fam

@weedfreer 4 года назад

Wow man...this is awesome...I have literally zero knowledge of Linux or PI but you've explained this so well that I could do this myself without issue! sweet dude!

@danielking4329 3 года назад

me as well im trash at coding but still can lol

@justincdotme 4 года назад

Excellent video, the instructions are very clear and the production quality is great! Thanks for putting this together :)

@danielking4329 3 года назад

heckin joans

@Dogewatch69 2 года назад

big fan of the obstructed view of the circuit. really helpful...

@ReflectingMe2024 6 лет назад

Fair play sir, you really do explain things very concisely and clearly. Kudos to you.

@philippe5394 3 года назад

Thanks, this is simple and helpfull as I am a beginneer.

@66_haridnyanandkishorbhada39 3 года назад

Very good explanation and easy to understand👍

@AndersJackson 6 лет назад

You can always use Tab-key to do commando or file name expansion after enter some few chars.

@SounaakChowdhury19 6 лет назад

currently i'm doing on this project....... thank you to know all the details from you.

@danielking4329 3 года назад

me too, i love this video

@Kfrankie46 2 года назад

Got it all working, would love to know how to get it to output the sensor readings to home assistant so I can use it along with my home automation to control my home heating/cooling according to temperatures

@aerospace_andy 2 года назад

I had big difficulties since I could not find my sensor and it unfortunately was not covered in the videos and tutorials. Apparently following Circuit Boards Tutorial comment section on the website in case you get a 00-XXXXXX in the /sys/bus/w1/devices/ folder (or multiple, with changing numbers) instead of the 28-XXXXX this is faulty reading data. The ds18b20 sensor will give you an 28-XXXX adress for sure! What happened? I spend a while figuring out if it was the wrong resistor, pin setup etc. In the end it was only a severe loose contact of my pin heads on the raspberry pi zero 2 W. I used a 4.7k resistor. It works fine now. I have to solder it. Keep trying, thanks Circuit Board.

@eriklaken1025 6 лет назад

Thank you, i am learning a lot!

@danielking4329 3 года назад

me too

@aimiliospetroulas7812 4 года назад

Hello very helpful video, i need for my project to read 4 temperature sensors and im using this specific one. Everything works great for the one sensor but i cant make it work for more than one. I am using an other Pin other than the Pin 7 of the Pi to read the temp data but it doesnt work. Why is it necessary to use the 7 Pin (GPIO 4 (GPCLK0)) to read the sensor and it deosnt work for other pins. Or should i alter the configurations to work with other Pins. Thank you in advance!

@aditijaiswal6968 3 года назад

Thank you for cool tutorial 👍

@51_patilpoojagajanan47 3 года назад

Very well explained 👍

@jaxonvvv 6 лет назад

Thank you for this tutorial. Would a 0.6W 47k Ohm resistor work?

@mrrcomp 6 лет назад

Hi Interesting Video. I followed your instructions. When I go to sys/bus/w1/devices and do ls a few times each time I get different addresses. (sometimes 2 sometimes 3) when I go any of those specific directories cat w1_slave I get file not found. I also have a i2c bus device connected could this be the problem?

@Mika-zf4mq 2 года назад

Danke bratan das video hat mir ehrlich geholfen vallah😆

@Rockclimbky 6 лет назад

Would it be possible to have this sent the temperature out as a Syslog message to my SIEM? Thank you!

@bhaveshprakashjoshi9932 3 года назад

Nice vedio on connectivity of Raspberry-Pi circuit with temperature sensor.

@daenutt8 5 лет назад

Gracias por el tutorial me ayudo mucho en mi proyecto una consulta como puedo mostrar nuevos caracteres usando raspberry pi 3 con python 3 y lcd16x2 me serviría mucho cualquier ayuda, gracias.

@surabhiborase5203 3 года назад

Nice Demonstrations.

@dmlong47 7 лет назад

maybe you can help me. have a friege with this set up but the tep is always off by like 10 degrees

@toxhawk 6 лет назад

Looking to do a project and needing some help on where to start for hardware and if this is possible to do. I have which I think are analog temp sensors since there doesn't seem to be enough wires on the cable to be digital but it is a cable with 6 sensors per cable and I have 3 cables I want to daily monitor readings on per day in a chart or something from my phone or have them emailed to me. Reaching out for some help thanks in advanced

@shaikhmudassirmohiyoddin1887 3 года назад

Nice Demo

@dhirajrajput1829 3 года назад

Nice video!!! Thanks..

@surajpatil9470 3 года назад

Nice Demostration....

@pootispenser9354 6 лет назад

Where can I get a LCD screen 16x2 with the pins already soldiered? Pls answer soon ASAP!

@GinandjarSatyanagara 8 лет назад

Thank you, sir!

@danielking4329 3 года назад

i agree

@GoncaloGirao 7 лет назад

Can the 4,7KΩ resistor be replaced with a voltage regulator?

@roshanipatil1960 3 года назад

Great video.

@wiseguytr 4 года назад

What can we do for the RP to translatevthis data to SNMP ? I mean, What if we would like to connect the temp sensor to a system like Nagios to collect the temp reader data ?

@berhanewheeler4651 6 лет назад

My pi switches of when connected to the 3.3v via male to female jumper cable

@JohnDoe-ki6fm 4 года назад

Cool. Thanks for that video. ;)

@danielking4329 3 года назад

ur a video lol

@pg5201 4 года назад

Thanks for the video. I must say I doubt that the thermometer is accurate. 30 degrees celcius when you touch it? Seems a bit high to me. Maybe I'm mistaken. 🙂

@CaptainsCollection 7 лет назад

Can you help me with a probe distance of 125 feet? This would be water temperature of a lake that is 125 feet from the house.

@bao-toanle6034 5 лет назад

Do you need two breadboard when you have a long bread board

@abhisekpatnaik8422 5 лет назад

What is the sensor to count body temperature in crowd area .

@layfamilyfarmsllc5523 4 года назад

How would I go about using this temperature data, turn a fan on and off. Say, for instance, any time the temp is 75 or higher, a fan kicks on. When the temp is back below 75, the fan goes off.

@abdulhadisulaiman2352 8 лет назад

Many thanks!

@danielking4329 3 года назад

i love u

@nrgcomics5537 2 года назад

This video has been very helpful but I am running into an issue when using the code to display the temperature on the LCD screen. When I try importing RPLCD, I get ImportError: no module named RPLCD even though I do have it installed through pip. Does anyone happen to know what I am doing wrong?

@ciumacencucosmin7381 7 лет назад

Hello, excuse me .I bother you and I need some help, torment me 2 weeks to program the Arduino Uno board with 2 sensors on it and fail. How could I schedule? I mention the Robofun as sensors and Arduino Uno board. How can I contact you to talk about this subject?

@ZephodBeeblebrox 2 года назад

How would you do this but setting up multiple temperature sensors? I'd like to do this with 6 temperature sensors.

@terryboyle Год назад

Totally new at this, what wattage rating for the resistor? Thank you

@vivek46531 5 лет назад

how to store the data, like data logging the temp value??

@pmbu 4 года назад

what is that stuff you have plugged in before the video starts am a beginner

@nageshraut3302 3 года назад

Very nice 👍👍👍

@AmCanTech Месяц назад

Thanks

@todddelozier8172 4 года назад

Prototyping is great, but what about afterward?

@hotelpapa8422 8 лет назад

Hi! Thanks for a great tutorial! Quick question: how do i extend the temp. sensor? Lets say, 5m.

@WEROBOX 7 лет назад

HotelPapa maybe you wanna look an industrial sensor, that support long distance and higher temperature. Just remember that kind of sensor the big most are not lineal, you will need an external device to convert lineal into range that sensor. God luck 👍

@annisatriyansusan5703 5 лет назад

hai, what if we want to use multiple temperature sensor? :)

@nageshraut3302 3 года назад

Nice 👍

@raysrcsandtech 7 лет назад

Looks like you have some quality jumper wires, I got some and they look very weedy and so thin. May I ask where you sourced your cables from?

@danielking4329 3 года назад

i source my cables from down under

@kentpaul8269 4 года назад

is lm35 the same with DS18B20 sensor? thanks

@shanecallaghan6960 7 лет назад

Do you have a list of materials for this whole project on your website??

@danielking4329 3 года назад

no i dont think so, very sad

@joycejoy1107 3 года назад

Can I know what are the materials you used?

@kachun1000 7 лет назад

Hi. can this be done using java?

@softa74 4 года назад

Hello, I need a little help, it's a temperature sensor DS18B20. I wonder if I can influence it to read the wrong temperature. I need to cheat the electronics to which such a sensor is connected at a given moment. It is an electronics for a pellet burner, more precisely a centrometal burner from 2012, and the principle of its operation is such that when the water temperature in the boiler drops below 60 degrees, it goes into automatic ignition. The ignition automatically goes should or should not need hot water. I tried everything but the only solution is to fool the electronics and give it the wrong information about the water temperature, that is. that the electronics receive a signal that the water temperature is 60 degrees or higher. Thanks in advance.

@rudy10298 4 года назад

What's the lowest temperature that this can measure?

@8at406 7 лет назад

sudo modprobe w1-gpio fatal error w1-gpio cannot be found

@battlecampkhimmay2981 2 года назад

Is ut okey if i directly go to the python or i need to do all that terminal?

@toffpersonal6979 7 лет назад

i would like to make a temperature sensor to control fan speed and regulate voltage for led can you point me in the right direction?

@danielking4329 3 года назад

no u

@frombrum 3 года назад

you would need to write a program where the logic is if temp>75: fan.value(1) else fan.value(0) where temp is the sensor reading you want to check and fan is a pin out connected to the fan supplying it with 3.3 volts or a solenoid for a mains powered fan (dangerous if working with mains)

@jimmy2643 5 лет назад

Awesome job! But please tab out long files/directories. You gave me some anxiety lol

@danemarkabad8651 4 года назад

Hi, how can I upload the data to a website ?

@berkankucuklu377 3 года назад

Can I also do this with the pi os and not windows like you?

@TokkelProductions 6 лет назад

after entering the command ''sudo python temp.py'' I get the following error: Traceback (most recent call last): File "temp.py", line 6, in lcd = CharLCD (cols=16, rows=2, pin_rs=37, pin_e=35, pins_data=[33, 31, 29, 23]) TypeError: this constructor takes no arguments which is weird because I did EXACTLY everything you did : / can you help me?

@cupbowlspoonforkknif 5 лет назад

I figured it out! After some Googling I discovered that you need to install an older version of RPLCD. Type in:"sudo pip install RPLCD==0.9" and then it works! Since that code is old, the language doesn't work with the newest version. I hope this helps.

@patrickesumei3095 7 лет назад

Hey there i did follow your tutorial but i don't seem to find the unique address of my temperature sensor. Any suggestion would help thank you.

@danielking4329 3 года назад

yeet waddup

@6223kerch 7 лет назад

Great Video, what is the make and model of the LCD?

@poolpoolification 6 лет назад

sunfounder lcd 2004

@shaikhaalobaid913 4 года назад

can I run this code on ubuntu machine ?

@erichsato 8 лет назад

I'm tried to connect a Keyestudio DS18B20 with the Raspberry Pi 3, but I forget the 4k7 resistor. Could that lead to a fatal error?

@johncherry108 7 лет назад

Since you were able to type your question, it seems like nothing 'fatal' happened. As for the DS18B20, the temperature measurements may have been a little inaccurate. Actually, I've seen a webpage somewhere which explains that the pullup resistor isn't really necessary, but resistors are so cheap that it only adds a few cents to the cost.

@67_giraseshubhambhagwan50 3 года назад

nice

@permofit 3 года назад

This is awesome but old can you make a new video on a pi 4 with n lcd with 4 wires and explain the code as you go

@jaykrishna2371 5 лет назад

When "ls" is executed , I don't get the sensor name only "W1_bus_master1" is listed..

@mustache2295 3 года назад

I know this is old, but for those who are experiencing this too, It is probably because the file is hidden by default. To find all files, even hidden ones, you type in the command "find". To see the difference in output between "find" and "ls" experiment in the CLI(Command line interface)! Hope this helps.

@berkankucuklu377 3 года назад

@@mustache2295 When I'm typing cd and my unique address base then the terminal say no such file or directory. And there are 3 addresses and then there is w1_bus_master1

@mustache2295 3 года назад

@@berkankucuklu377 you may have a typo! Thats the only thing I can think of. Sometimes if there are spaces in your file names and directories it messes things up so remove the spaces or look into how to cd to a file with spaces(i forgot how to do this sorry)

@JohnSmith-rn3vl 3 года назад

32 wire connections .... to read temperature. The idea of raspberry pi being accessible is a dream that died many years ago. I say that as a programmer with 20 years experience who has built at least 50 various electrical circuits for all sorts of things. Very few people will go this far which is a great shame for our civilization.

@Kfrankie46 2 года назад

technically there are only 3 wire connections to read temperature, the rest is to get the display working

@munin81 Год назад

I'm very new to all this. I was hoping to make a sensor for outside, but I've got a somewhat silly question. Is the breadboard used for ease of testing? How would I connect all of these without a breadboard? I bought a kit for this, but it didn't include a resistor. Do I need the resistor in order to use this?

@robertreimann1846 Год назад

Hey! I'm having the exact same questions. Did you manage to figure these things out by now? Would love to hear!

@VroomvroomNY 2 года назад

will this work with a thermistor?

@AntonRodriges 5 лет назад

What is the small white box with holes? Can you give a link?

@James-hy8gu 5 лет назад

its called a breadboard.

@yourchoice3655 4 года назад

os. system syntex error how to solve..,.

@rhynoxas 3 года назад

It works even on a Raspberry PI 4?

@benjaminvincent2578 5 лет назад

Why do you use Putty? Could you not just use the Command Prompt within Raspbian?

@sumitkuldharan3068 Год назад

please make video on LM35

@samiraalamshah7752 5 лет назад

Hello sir, After "cat w1_slave" I got the message of no such file or directory... What should I do Sir

@rpc6313 5 лет назад

change directory to the unique address of the sensor (cd 28-sensor number) then type cat w1_slave

@aliahliya8915 6 лет назад

Hi, i've tried this tutorial but my temperature cannot display on my lcd. Please help me :)

@danielking4329 3 года назад

cant srry

@berkankucuklu377 3 года назад

There is no unique address in the devices folder like you. Pls Help

@nitingaur3006 6 лет назад

Can we use this sensor to mark the temperature of soil and environment to know the temperature required for a particular crop? I mean if it shows 25 degree c. And it's not enough.... Please reply.. it's for the college project.

@darrentiu1124 7 лет назад

what does it mean when it says "modprobe: FATAL: Module w1-gpio not found

@poolpoolification 6 лет назад

i had too, it was due to the fact that the wi fi was not on on the pi,

@seasonedtoker 4 года назад

Mister, where's your tab key??

@ganeshnarvadkar5441 7 лет назад

Hello sir, I am not able to get 28-************ folder. Only I get is w1_bus_master1. 28-************** is missing.

@PixelPotato 7 лет назад

I found out what happened, because it happened to me- on his chart regarding the temperature sensor, you'll notice it's labelled "bottom view" I didn't notice that on the first glance, and realized his sensor was rotated the other way on his physical product. I had to flip my sensor around because what was labelled "1,2,3" was actually "3,2,1" because I assumed I was looking DOWN at the diagram, and not up

@AndersJackson 6 лет назад

Manza Because they are learned to be polite, and still practice that on Internet?

@poolpoolification 6 лет назад

I had that issue too, it was the wiring of the temp sensor/resistor on board.

@felipe.verasay 7 лет назад

Can we use it to control a fan like, if the sensor (specifically DS18B20) marks 30 degrees, the fan start running with 20% power, if the sensor marks 40degrees the fan increases to 50% power and finally if the sensor marks 50 degrees the fan increase to its maximum power?. Please help!! is a university proyect.

@rizwan3147 7 лет назад

your question is very good. I also want to know this

@hannescamitz8575 7 лет назад

Yes you could, but you'll ve to rewrite some of the code to either send data to the LCD or out a signal to a transistor (or you'll kill your RPi because of over current) and this require more knowledge of electronics and so on. You can make the RPi show the temp AND control the fan or fans too. And if you would like too make the fans not just start and stoo you can control them via PWM (Pulse With Modulation)

@oljeapa 7 лет назад

the raspberry can turn on a relay and that way it wont kill the raspberry

@bratan007 6 лет назад

I'm doing exactly that. You can get small MOSFET board that will let you control high voltage device like fan or LED strip via RPi's pins. They are very cheap too...

@yuvrajsandhu5092 6 лет назад

You could use a code to set the fan at a proximate speed if the fan can be sent commands, with that make it a if/else statement and it should work. Even though this is a comment from a year ago I still want to comment because why not.

@pe._sca1558 6 лет назад

the raspberry is with raspbian or what ?? thanks for share ! excellent video. cheers from argentina !

@stevenA44 4 года назад

I don't understand why people are always SSHing into their Pis, when you can do everything from the terminal on the PI itself. Connect a keyboard, mouse and a display and do it from the Pi. That's what I do.

@csan3691 8 лет назад

can we map multiple sensors using single raspberry pi?

@hvitis9876 7 лет назад

YEEEEEEEEEEEEEEEEEEEEA!!

@hannescamitz8575 7 лет назад

You've got like 20 I/O pins on them. ;)

@AndersJackson 6 лет назад

Hannes Camitz and with the temperature sensor being a singel wire bus, we can connect many temperature sensors.

@9999rav 6 лет назад

You can connect theoretically as many sensors as you want - all sharing the same bus, using only one GPIO pin (not counting +5V and GND

@annisatriyansusan5703 5 лет назад

@@9999rav hi, i wanna ask. how about the programme? is there any different between using 1 sensor and multiple sensor? or we r just using the same program for multiple sensors? thx:)

@PyroRob69 7 лет назад

John C G, the Pi is not intended to be an industrial computer. You really need to figure out what you are talking about. Maybe you should troll the 8051 pages and demonstrate your incredible 'high-end electronic engineering' skills and knowledge. This is a great tutorial for people learning about the Pi, a SOC that was designed for school kids to learn about basic computers.

@embe5100 6 лет назад

This is a great Tutorial for people learning how to burn up a bunch of DS18B20s, thanks man! Tremendous

@alfredfabulous3640 Год назад

What about the costs?

@marczabala8163 4 года назад

can i have a reaction paper for this video . hahaha i badly need it

@muhdizzlan974 6 лет назад

Is it wireless temp. sensor?

@shoaibakhtar2484 7 лет назад

can anyone tell me how can i know the IP address of my rasberry pi ?

@WEROBOX 7 лет назад

Shoaib Akhtar in terminal type this "ifconfig" whithout the double coma, so that command gives to you your ip. Good luck 👍

@konstantinmeudt318 7 лет назад

ifconfig in your terminal. if your pi is connected over ethernet you will find your ip unter the interface eth0. otherwise if you're connected over wlan you will find your ip under the interface wlan0