Arduino Tutorial 52: Portable Temperature and Humidity Sensor with DHT11

[@markfuentes3666]

I am legend. 3D printed a holder for my uno and bread board.

[@muhammaddanial50]

WoW

[@reviloprojects2197]

I did the same thing ;) However, i am still planning on getting an arduino nano to make future projects smaller and more compact :)

[@williamwachter3279]

Paul is a legend, I am an apprentice appendix😂. One is never too old to learn. Thanks, Paul!

[@jamesgoacher1606]

I am glad you pointed out the polarity issue. I am accumulating things and after your video I looked at my kit. I had assumed, without thinking that the outer rails would be labelled commonly and the inner raile commonly.and the power supply unit similarly. I think this is not sensible. I also got the impression that if the sensor and the pot were on opposite sides of the board the Nano could move up several holes. But this is hindsight. The reason for my accumulating stuff is for me to make something almost identical. I think I have some wire wrap wire and twiddly thingy remaining somewhere from 35 yrs ago. I knew it would come in handy. Many thanks for these tutorials.

[@pokerface68]

I am Legend and I am Legend as a Troubleshooter! I was having difficulty with the Nano I purchased through the link in your description but I got that figured out and got the project to work while connected to the computer. Then I attached the power module but it would not fire up. I realized the + and - were switched on the power supply module and I went ahead and rewired the rails for the correct polarity and it worked perfectly! Very satisfying project, I ran around like an idiot measuring the temperature all over the house. Thank you for another fine lesson!

[@damonbostrom6857]

Completed the deLuxe Portable Temperature and Humidity Sensor Independently! Watched Paul the Master Coder and got many ideas for simpler and cleaner design!

[@RobVollmar]

Paul, I defended my thesis. I am now a master. Also, I got a Nano and powered it with the power supply to run this project, That makes me a legend. I guess I'm a master legend! I am untethered!

[@Bob-zg2zf]

C++ is the most suitable programming language for knowledgeable people like Paul. Both the programming language and the engineers are beautifully intelligent. I love both.

[@lorisrobots]

I am legend. I did the project before watching the video. This project really pushed me to move forward with my prototyping skills. I got a nano; made my own "neat and tidy" connecting wires from 20 AWG solid wire; laid out the project so the breadboard power supply was on in the correct orientation. I had the same orientation issue as you did and had to fix it. It was a great project. Even my engineer hubby was impressed with this one. Thanks!

[@paulmcwhorter]

Excellent!

[@Aes-nt1tn]

Since buying a Nano is not an option for me, I had to dig up some ingenuity to make the Uno portable. So I moved the LCD down onto the breadboard proper and used the precut jumpers (plus a few I had to make myself) to make the connections. I was thus able to eliminate the flexible jumpers, making the whole thing pretty "solid." I put the whole thing on a small sheet of corrugated plastic, plugged a 9V battery into the DC connector, and voila! I became a legend in my own time.

[@anitacunningham7831]

I am legend. I purchased the Nano and the breadboard jumper wires as well as the larger breadboard for later projects. Thank you so much for having the passion to share your knowledge.

[@bill6590]

I AM LEGEND. Yep, got it to work after correcting several wiring mistakes. Including: putting the power source on two rails without realizing that - & + are reversed on one rail. That one really got me for a long time. Before I saw the - sign on my voltmeter while checking voltages. But, everything worked great.

[@richardletourneau2672]

I am a legend, I use the same power adapter board and a 9 v battery. I used also an I2C lcd 1602. I like you way to explain everything. Thank you very much.

[@drbirdleaf2574]

I had a hard time with the library for the sensor. After several hours that included removing and redownloading the ide, no matter what I did there’d be a different error. If I fixed what it didn’t like, something else would be wrong, so I change that and the original thing would then be wrong. I tried several versions of the DHT11 library. The only way I was able to solve it was to copy another sketch I found online and add the lcd code to make it do what I wanted. It was by far the frustrated I’ve been so far through all these lessons that I’m enjoying. Thank you for making the them for us.

[@mariorosenov9851]

I am legend! It was a very easy thanks to the great tutorial you make :)

[@keyboardlearning7552]

I am Legend. I'd spotted the polarity issue of the power board, and already had it the right way round. Many thanks for these tutorials.

[@davidtomasgaitanrodriguez1356]

Legend in the making! I used a powerbank with 5V output voltage. I read on the internet that most powerbanks have 5V output because most phones use 5V to work, so if you have a powerbank you may have the solution already! :)

[@richardalexander633]

I am legend in troubleshooting - as I did this project on my own with a nano. You are a legend though in making such great lessons!

[@arseivan]

As instructed, I am reporting that I am legend in ts! 😁 and you are legend period! UPD: In regard to placing the power module, I think it was just designed to be on the other side of the breadboard. UPD: watched the wire wrapping video too, great stuff, I highly recommend everyone to watch it!

[@gilnasty82]

I am legend!! Thanks to you Paul!! Used a power bank, but only because my 9v battery I ran dead playing with the stepper motors!! Guess I’m also a legend in troubleshooting, because your polarities were swapped on your power supply board to the breadboard!! 😊

[@kevinsonpartosan8875]

I am legend. I was successful in doing the assignment, you're an awesome teacher Paul!

[@skmplanet9591]

Tutorial 51 and 52 have unveiled lots of mysteries. Thanks a lot.

[@donsanders9863]

I am a legend. It was fun to make a portable unit and take it outside, in my garage, etc. and check the readings. Thanks so much for all the lessons. Boom!

[@paulmcwhorter]

Nice work!

[@BRIANCLEMENT28]

You are legend. homework went well. library wouldn't take. Had to go into manage libraries and get one from adafruit. jumper threw me for a loop for a while. smooth sailing after that.

[@matheusmota9500]

I'm a legend but you are the one who is teaching me how to become more intelligente you are an amazing teacher. I just want to tell you my gratitude I hope in the future as far as I learn new things become like you and spread knowledge like you did, thanks Paul

[@paulmcwhorter]

LEGEND!

[@MrSikkandar]

dear sir, please add, how to use wifi, bluetooth capability and gps, gsm videos using modules with arduino, your way of teaching is very nice, others are just demonstrating but you are the one who teaches thing clearly, wifi, bluetooth,gsm, gps will give more power to our projects

[@tobinsexton6246]

I am legend. I thought that was how were supposed to make the first one! I still watch your builds too see your process in comparison to my own. Thanks for the Lessons!

[@tobinsexton6246]

*to

[@flyingsalmon]

"I am legend" :) Best explanations anywhere in the universe...especially all the nuances, innuendos that are so critical in settings these puppies (jumper settings, orientation, gotchas with power requirements, libraries, etc. etc.) that most other videos are terrible at or just gloss over (maybe they're copying someone else and don't understand the things really). Thank you for all your time, Paul! YOU are the best.

[@paulmcwhorter]

Wow, thanks!

[@yolandanelson31]

I am Legend! I don't have the kit that you are using I have a GAR Monster kit which came with the Nano and a ton of other Arduino boards. Only problem I had was finding a pin diagram to find the 2 connectors for my LCD (mine has a LCM1602 IIC chip connected) I also don't use the Arduino software, I use Visual Code with Platformio to do my coding. I love it more than the actual Arduino software, although it takes a little more pausing of your video and a little more research to get everything working but I have gotten everything to work through all of your videos. So I believe I am legend in troubleshooting! Keep up the great work!

[@aldrin-google-ads]

Plugged in the 9V battery, and my system is portable! I am legend!

[@Chupria]

This is my second summer with you. I usually learn programming during the summer and 3d Print during the winter. Hope you make many videos, these will be here on KZbin forever.

[@paulmcwhorter]

I hope so too!

[@andrewwalker9502]

Fun homework. I'm waiting on my Nano so I'm wired now. Added a couple of extra lines of lcd.print so the temperature toggles between F and C every two seconds.

[@wallymurray620]

I am Legend and I am Legend in troubleshooting! Had it done as part of lesson 50s homework, complete with a Nano. Really enjoyed this series. Looking forward to the next. Thanks again Paul.

[@harrischalk]

Great video Paul, I never ordered a nano, instead I ordered a ATmega328 chip. Got away with it, it worked well. Enjoying the series!

[@adamcurtice3584]

I am Legend. I used two different methods to make mine portable. I used a portable phone charger which worked great but was a bit bulky. I also dug through my stuff for an old 9v battery connector. This I soldered to some 20 Ga. solid wire. I was able to plug this wire into the Perfboard at Vin and ground and viola it worked. Serious portability. I do however prefer the power block for its rechargeability. Just my 2 cents.

[@robertschuldenfrei2402]

I am legend. Tested it over a stove and in the shower. I did not have the dangling power supply pins as I am using a fixed resister (2KΩ) and the 16 pin of the LCD is all the way to the right of the breadboard. Of course, the LCD hangs over, but it is very light weight and all the pin really anchor the LCD.

[@dalecapling5153]

I AM LEGEND!! Put the unit in the freezer. My temperature sensor changes very slowly but does work.

[@mikerusling416]

I did the programming and it worked. Got a battery pack attached and made it mobile. Interesting stuff. Loving the tutorials. Can wait to complete these Arduino tutorials and move on to the robotics stuff.

[@waynenicolson5864]

Legend! I guess one should just remember to always plan to have the power supply mounted on the end of the breadboard where the column numbers start.

[@henrikandersson1924]

I am legend. Did it first on UNO and now Nano. Thanks Paul for the great Tutorials.👍

[@paulmcwhorter]

LEGEND!

[@bearpapa1606]

i use a nano and connect it to my power bank through the usb cable. had fun measuring temperature and humidity around my house.

[@erygion]

I am legend. I used a USB 18650 single cell power supply and did on my own lol. Great video Mr. McWhorter. I am legend in troubleshooting (wrong polarity bummer!)

[@lanberthou3585]

I AM LEGEND IN TROUBLESHOOTING. These are so good Mr.McWhorter

[@paulmcwhorter]

LEGEND!

[@fun_engineering5710]

I am a legend in troubleshooting I did the project on my own and it was real fun thanks for the lesson

[@muhammadrafiqulislamkhan6994]

Paul I would say very respectfully to You that you are legend to me. I love every words to you. God bless you. Thank you.

[@niteshram1578]

I don't know the problem...but you are the LEGEND😇

[@razvandorobantu5922]

I am legend, little things like this makes your videos very enjoyable.

[@paulmcwhorter]

Legend!

[@mrhookswordkabal]

"I am legend". Thank you Mr. McWhorter.

[@atrejosq]

I did it ahead of you, not with “nano”, finally got it with Cº, not Fº (not used where I live), had some issues, but with cables not with program.

[@Yousif_Maksabo]

I did the project with the usual arduino uno, I did use it around the house portably, but with carrying it carefully, so, hopefully I AM LEGEND!

[@kenmeyer100]

I chose to build a base unit with power supply, Nano and LCD and move the applications (like the DHT11)onto another board. A second or third breadboard can easily be attached or detached from the base board as they are designed for this.

[@jasonvictor9542]

I'am legend after you! Thank you another great lesson, my Nano is working great with battery power reading humidity and temperature!

[@paulmcwhorter]

LEGEND!

[@gghutton]

Yes, a proto type is built with great fore site. This is why I purchased perf boards. I made my box 3x3x1.5. I also powered mine with a buck converter and a 12v cigarette lighter, for my vehicle. This was a fun project to build.

[@tntragan]

I am legend. Thanks again for the great lessons. I don't have the nano yet so mine was a little clumsy, but I took it around the house.

[@paulmcwhorter]

Fantastic!

[@webslinger2011]

I managed to make it wireless, using i2c for the lcd. Also included latching buttons to trigger a relay. I will publish a video soon.

[@socialogic9777]

I am legend in troubleshooting. Saying that with a pinch of salt, as I am in my final year of Electronics and communication ubdergrad course.

[@mattryan6832]

I AM LEGEND OF TROUBLESHOOTING AND PORTABILITY. thanks paul

[@paulmcwhorter]

LEGEND!

[@giliandroengify]

I'm legend! Happy new year(2021) from Brazil Mr. Paul!

[@abel26]

I am legend in troubleshooting. I really enjoy these lessons!

[@CarolinaDGF]

I am legend - both in build and polarity debugging. Great lesson!

[@paulmcwhorter]

Boom!

[@RicardoHernandez-nd5pp]

I did this project in on a Arduino Uno, and it works.

[@danbergquist5729]

A legend has emerged, found these lessons valuable. I got the NANO ordered and cannot wait to start the next project

[@Allottedaaron]

I looked at the Jumper wires and thought there would probably be the kind of issues you experienced with the wires having to be laid across each other and bent round to fit. So instead I bought some conductive wire, some PFTE tape and some colour coded heat shrink flexible tube. It means I make every jumper wire as a custom piece but obviously the more I make the fewer i need to make. It's also quite fun to do. I am legend.

[@RicardoHernandez-nd5pp]

Yes Paul, I think the next step is to wrap up this, or another project into a 3D print !!

[@iainsimpson6986]

Nano arrived - legend status achieved with 9v pp3. Am trying to use oled display with mixed success. The suggestion of using the more rigid jumper cables works really well. I've joined two breadboards together and can cut the wires to length. It makes the board so much neater and stable. Cutting longer wires enables me to colo(u)r code the usage (red - 5V white - ground etc).

[@norbertvachtler3850]

I'm a legendary troubleshouting 😎 I used my power bank with Ardunino Uni, and it's worked. Thank you for this tutorial 😊😊

[@davidrender4028]

This project went great, thank you. I did get the components suggested and it all worked

[@paulmcwhorter]

Great job!

[@opalprestonshirley1700]

Mine worked real well. Walked around with it and there isn't that much variation in the values. Fun project looking forward to the next projects. Thanks Paul

[@filetdelumiere5037]

Great video. The logo of your channel should be a mug of iced coffee :)))

[@chirukapil]

Vow. It's really amazing that we can build a standalone kit which work really well. Thanks Paul for your great lesson.

[@johnhelt5475]

Also, an interesting tidbit. When I am done playing with these for the day, I put the kit in the garage to keep cats from gnawing on the wires. Today, when I brought it in and hooked it up, the everything was cold, reporting 49F with 10% relative humidity (RH). Within a couple minutes, the RH shot up to over 60% while the temp was creeping up degree by degree. My house is quite dry, as it is winter here and we do not use a humidifier. Over the next 2 hrs, the RH finally settled to the more accurate 38%. It took me a bit of thinking to determine what happened. I will post what I believe happened in a reply to this post, and give others the chance to think about it.

[@johnhelt5475]

While my home is fairly dry, it is much warmer than the garage where the device was stored. The RH is higher AND warm air holds more moisture (Hence the relative part of Relative Humidity / RH). My guess is that moisture from the air began to condense on the cold DHT, saturating the medium in the humidity sensor and skewing the readings until it could dry out. What do you all think? Does this seem reasonable or am I missing some other factor?

[@williamwachter3279]

Condensation of water on the cold unit in the warm house. As the temperature of the thermocouple rises, the condensed water evaporates making the realtive humidity high on the sensor.

[@PaultheALLclaw]

I am legend and I ran into the reverse polarity problem on the power supply too but I got it working!!!

[@eancarris3850]

I am legend. My nano and neater jumper wires are still in the mail so what I've built is a bulky mess, but I got it done! Wooo!

[@paulmcwhorter]

LEGEND!

[@ErlankBru]

I am legend. Again, one of my FAV builds so far!🖥🌟

[@turatsell]

I am a Legend and legend in troubleshooting :) Love you Paul! You are my favorite teacher in all youtube!

[@paulmcwhorter]

Wow, thanks!

[@turatsell]

@@paulmcwhorter For me is no better time than sit alone in the night and do these lessons with you! Since i use different set and live on a Linux Mint my troubleshooting never ends :) I live near Finland and enjoy my coffee without ice, especially in Autumn :) This precaution about adding vodka to it was hilarious :D Next i'm looking forward to build this wonderful car but currently i'm in trouble with this Keyestudio Smart Home (maybe you will do another fun project with this) I made a mistake and bought it first and then i discovered that you have such cool next project with this car. I don't like Keyestudio code at all. I know that you can do it as shiny and working great like all you do! Your code is efficient and short how it supposed to be. Even i understand now when i watch Keyestudio code which gives me wrong kind of goosebumps :) I have basically all i need thanks to your lessons but what eludes me still is how to tie it together and make all sensors dependent of each other...(for instance when nobody is home ventilation works slower and windows are shut) Recently I've lost my job and now i have to wait when things get easier. Currently is enough for me watching how you build this car, i hope that i will get it eventually. Many blessings to you!

[@stephenmarshall1286]

Yes did it. Used an Anchor power bank. Then took it a step further and moved the project onto a PCB and used a phone charger to then locate it on my wall lol

[@adamcurtice3584]

As per the Arduino website the NANO Vin connection is designed for 7 to 12 VDC. I also verified after connecting the 9V battery the power rails had only 5VDC on them. The battery needs to connect to Vin not 5V.

[@cbrombaugh]

I am the 78 year old legend in troubleshooting! This lesson shows that the Arduino could really do something useful. I managed to fit my Mega 2560 and all the other stuff on a breadboard. I bought the giant breadboard that you suggested and will order a Nano for the future . Do you think the Raspberry Pi Pico may be the way of the future for projects like this, since it is now claimed to work with the Arduino IDE? Could the (3.3 volt) Pico be used with all the peripheral devices that work with the Arduino? Keep up the most excellent teaching lessons!

[@Jim-mn7yq]

I am legend in troubleshooting -- truth is, I made the same mistake when I did the project and finally caught on.

[@Anonymous-yy5qr]

I am a legend at troubleshooting!!! Thank you for these beautiful tutorials

[@paulmcwhorter]

Happy to help!

[@johnhelt5475]

This is one of the main reasons I began taking this tutorial. I hope to build a dual DHT sensor portable which logs data periodically to a file on an SD card. But I have much more to learn before getting that done. (Nanos arrive today)

[@gjd54321]

I am legend in troubleshooting. Great video Paul, so easy to follow. Looking forward to other more portable projects. I'll be spreading the word...

[@MJCPeters]

I believe I have attained legend Plus. I have a larger board (like the one you recommended) and I did not have the polarity problem. When yours had a problem I checked the board that came with the kit and sure enough the polarity was different. That is until I rotated the board 180*. I guess I learned that it helps to mount the power supply first to determine the orientation of the other parts.

[@calvindeiterich9913]

I am legend. Got it working with the basic kit. Nano is on order. Had to use the AC power adapter.

[@paulmcwhorter]

LEGEND!

[@chrisingram7277]

I am legend in troubleshooting, I even had a power bank connected to the project before the homework assignment to show my wife as to what all we could do in the green house, I don't think she was impressed.

[@gimmeair57]

I have the same plan!

[@johnryall5711]

I am Legend. Even though I did spend AGES disconnecting the whole thing and reconnecting with the breadboard the other way round to get the Pos. & Neg. rails in line !!!!

[@bigsmokemelvinharris]

I’m legend at debugging!!! The problem was polarity. Amazing video as always Mr.McWhorter 👍👍👍

[@souvikmandal1919]

I am Legend and more than overjoyed right now 😊😊 also Legend in troubleshooting

[@travisrichardson5366]

I AM LEGEND!!! This was fun. Looking forward to more.

[@VasilKurdov]

Well, I definitely don't feel like one, but have spotted the issue, so I am a legend in troubleshooting.

[@paulmcwhorter]

LEGEND!

[@laxmanrao4554]

Awesome! Epic! Thank you Paul. I am moving around with the sensor outside and inside of the house and the temperature that is displayed is almost accurate. A Merry Christmas to you!

[@TheRaptor1967]

I am Legend! LOL. Funny, I did the usb phone battery pack at first, then decided that was too easy. Switched to that HW131 supply and powered it with a 2S Lipo battery (7.2V) out of my RC stuff. Worked well. I am also Legend in Trouble shooting!

[@Zuzzt]

Hi. I have a suggestion for your polarity problem. Take away the voltage selector jumpers and replace them with wires from the +/- pin respectively, down to the breadboard.

[@georgejansen326]

It looks all fine and it works.; but there is a great but !! I ordered a Nano on the internet. I don't think it's a original Arduino Nano. So it took me 3 days to find out that you have to use other settings for your Nano then for the UNO. For instance you have to use other setting: com 5 instead of 4, choose board NANO in the settings and last but not least use Atmega (Old Bootloader) in the settings. Also be aware to us CH340 as a driver for your Com 5 If you do all these, there is a great change that you will succeed; George Jansen from Holland

[@codecage9333]

I am legend! If your power supply board was on the other end of the prototype board your polarity would be correct. But since you have everything wired you'll have to turn the power supply board around by 180 degrees as you had it shown earlier. I have marked all my protoboards with an indicator that makes it easy to always get it installed before wiring anything up.

[@HyppyWayfarer]

You are legend... I mean "I am legend". Awesome series sir =)

[@shardyphotographic]

Another great lesson and advise. Thank you Paul

[@jimlabissonniere7400]

I am legend in troubleshooting....power rails are inverted between protoboard and power supply....change position of power supply by 180 degrees....Done!

[@andywylie287]

I am legend but only because I have been enabled by Paul "Legend" McWhorter!

[@axelthieser4712]

i am legend. Always thanks for your tutorials

[@friedrice71]

I am legend! Thanks, Paul for everything!

[@paulmcwhorter]

LEGEND!