How to use DHT22 AM3302 Temperature and Humidity sensor with Arduino

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In this video you will learn How to use DHT22 Temperature and Humidity sensor with Arduino code.
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If you wan to DHT22 to show temperature on 7-Segment Display, watch my other video:
• Using DHT22 Temperatur...
00:00 Start
00:44 Introduction
03:48 Wiring Explained
04:16 Downloading the library
06:34 Code explained
12:50 Demonstration
Tutorial by Ahmad Shamshiri form Canada
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Arduino Step by Step Course (over 100 lectures) Starts here • Lesson 00 What is Ardu...
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Пікірлер: 127

@sconescon6691 5 жыл бұрын

Out of every Arduino tutorial out there, from every site across the board - and I've been to em all (or so it feels like, it's a lot!!) - you are BY FAR, the best at explaining things. Thank you so much and please carry on :))

@robojax 5 жыл бұрын

You are very welcome. I am please that you found my tutorials helpful. I appreciate sharing my channel with your friends.

@ronnytoro3 2 жыл бұрын

Awesome page ! thanks for all your advices and information that you share!

@aminnonplus 2 жыл бұрын

Thanks pal ! Love from France

@projardgreen2568 Жыл бұрын

explain more videos like this, the code in detail, I subscribed because of how detailed explenation was.

@tonysicily2687 4 жыл бұрын

Awesome video, No music Clean video Nice VO Lots of info Thank you, Subscribed, Liked and Saved

@robojax 4 жыл бұрын

Much appreciated!

@gamestv4875 5 жыл бұрын

Good tutorial.Worked flawlessly. Thanks

@robojax 5 жыл бұрын

You are welcome.

@UpSpider 6 жыл бұрын

Amazing video. Really helpful.

@robojax 6 жыл бұрын

You are welcome.

@aminkelate 3 жыл бұрын

Thank you bro, you make my day..

@robojax 3 жыл бұрын

My pleasure

@alnoorratansi9364 4 жыл бұрын

as always I love watching your videos, how do handle negative temp. what changes do you have make in the code ?

@robojax 4 жыл бұрын

thank you very much. For negative temperature, it should just work fine. No change it needed.

@danmusiceasy Жыл бұрын

Great tutorial, very clearly explained! I just made my first air monitor :) Do you have any tutorials on particle sensors and VOC sensors, or plan to do any in the future?

@robojax Жыл бұрын

I am glad you found it useful. This was the first time I heard VOC sensors. I just checked it, very interesting sensor for Air quality. I might make videos in the future. thanks

@truthseeker7775 5 жыл бұрын

Thank you so much Robojax. What a great video. I wish you had continued on to tell us how to write the code so that the sensor could turn on or turn off a light or motor when the temperature reached or declined to a certain temperature.=====================================================================================

@robojax 5 жыл бұрын

You are welcome. I will make video on that as well.

@patrickduhirwenzivugira4729 5 жыл бұрын

Thank you for the video. Any idea how I can add a wifi module and send the data read as REST API ?

@robojax 5 жыл бұрын

You are welcome. I would have to make video that. I have no tested code or components in hand.

@jamesdumancas9597 4 жыл бұрын

Hi sir thanks for this helpful video i just wanna ask if the dht 22 can go faster than every 2 seconds loop?

@robojax 4 жыл бұрын

Because it measure humidity, it makes it to read slowly and you will not get accurate data less than 2sconds. See page 9 robojax.com/learn/arduino/robojax-DHT22_manual.pdf if you just need temperature measurement, then use another sensor and there are a lot other sensors that can read much faster .

@allan6952 3 жыл бұрын

Thank you very much !! I have a question. Do you know the difference between the Temperature value and the Heat index value ? Which one is more accurate ?

@robojax 3 жыл бұрын

You are welcome. Please see the details for heat index from National Weather Services of USA: www.weather.gov/ama/heatindex#:~:text=The%20heat%20index%2C%20also%20known,sweat%20to%20cool%20itself%20off.

@videotronicmaker 4 жыл бұрын

Thank you.

@robojax 4 жыл бұрын

You are welcome.

@fpt380 6 жыл бұрын

Hello . Thank you for your nice video . I have a question: Are the sensors like LM35 and DH11-22 accurate and reliable? Are it need to calibrate? thank you

@robojax 6 жыл бұрын

You are welcome. I have not compared it with LM35. Because this is digital while LM35 is analogue, this should be much better. No calibration is needed. Datasheet/manual has been provided.

@fpt380 6 жыл бұрын

Robojax thank you for explain

@cheikhanoumar9788 2 жыл бұрын

thank you very match

@robojax 2 жыл бұрын

You are welcome. The best thank you for me is to subscribe to my channel. Thanks

@JohnWick-id6pk 4 жыл бұрын

Hi, thank you for the informative video. What do you think would be the cheapest cable tu use the sensor at 3 meters from Raspberry ? Thanks

@robojax 4 жыл бұрын

You are welcome. This module doesn't need much power. Any wire will work.

@JohnWick-id6pk 4 жыл бұрын

Nice ! So just a basic USB wire is fine ? Thanks

@wesleywalsh4025 5 жыл бұрын

Hello Robojax, Is it possible to have more than one DHT22 in the same project? Thanks

@robojax 5 жыл бұрын

Yes. I will going to make a video on that but if you watch this video, it should work for you. kzfaq.info/get/bejne/mZ9ggdarx7SraJc.html

@alialvi419 4 жыл бұрын

kindly tell me that while you run DHT tester ,your uno borad is connected or not?

@robojax 4 жыл бұрын

Of course it is connected. I connected to USB but you can connect it ot 6V to 15V power adapter .

@michaelmotis3580 3 жыл бұрын

Thank you bro!! good job! it does work for me

@robojax 3 жыл бұрын

You're welcome!

@rianhamman6187 5 жыл бұрын

The DTH22 sensor isn't working with this setup for me, the sensor is pulling to much power from my arduino, any idea why it would (in the exact same setup as the video)

@robojax 5 жыл бұрын

either your are connecting the wires incorrectly or the sensor is bad. The only way to know is to connect another sensor.

@kikoinvents 5 жыл бұрын

tanks bro

@robojax 5 жыл бұрын

You are welcome.

@fatimamgaedeh4082 3 жыл бұрын

Hello, great video and tutorial. My question is, when I have to use a resistor? So, if I want to connect 4 dht22 sensors together when I need a resistor?

@robojax 3 жыл бұрын

Hello Fatima, you don't need resistor if you have the module shown in the video. I have the code on our website robojax.com. I added the link to that page on the same page where you get the code. the link to code page is below this video in the description. good luck.

@fatimamgaedeh4082 3 жыл бұрын

@@robojax Thank you so much, appreciate your reply.

@shecterelectric432 4 жыл бұрын

I have this error when I trie to run it. I t says ´error compling for board Arduino/genuino uno.´ I am using an Arduino uno board with the 1.8.11 version. Do you think you can help me?

@robojax 4 жыл бұрын

it means you have not selected the right COM Port for your Arduino. when your Arduino is connected click on Tools->Port and select another port and the try to upload.

@mohdfarezsamin1493 5 жыл бұрын

Possible to provide the code if a turbidity sensor is used instead of temperature & humidity? my code doesn't seem to work.

@robojax 5 жыл бұрын

I would have to have the device, then I would be able to say it it works or not. i just add it to my "to do " list.

@ezstudio3d 5 жыл бұрын

I getting "Failed to read from DHT sensor!". I am using the dht22 but mine doesn't have the black and adapter and I use a 10k omh resistor to 5v any suggestions ?

@farenhartman5559 5 жыл бұрын

I get the same thing! Did you get a solution for this problem?

@ezstudio3d 5 жыл бұрын

I did, I bought one with the little black thing that has the resistor and maybe some thing extra www.amazon.com/gp/product/B01N9BA0O4/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

@ilhamrahmatmuharam8501 4 жыл бұрын

when i running this program and open serial monitor "Failed to read from DHT sensor!" you have an idea ? i have try with different device but same result

@robojax 4 жыл бұрын

it means you have either incorrect wiring or dead module.

@sreejithunnikrishnan8484 3 жыл бұрын

should we connect a resistor of 10k if its an Arduino mega 2560? or jus direct connection

@robojax 3 жыл бұрын

you made me worry with your question. my videos are totally different. I never leave the details out. if you watch it fully, your project should work. So after watching the "wiring explained" section, I saw that I have shown it. you don't need anything expect the wires.

@sreejithunnikrishnan8484 3 жыл бұрын

@@robojax Ok thanks

@fauzanfikri4340 2 жыл бұрын

Hi robojax, can i use this sensor and a mega arduino stand alone without connecting it to a pc ?

@robojax 2 жыл бұрын

when we say Arduino it means stand alone. We use PC to just upload it after that we don't need the PC. yes this module works with any Arduino board. including Arduino Mega. Here is Arduino Step by step course with 100 video and codes Arduino Step by Step course that starts here kzfaq.info/get/bejne/Y5yhhtV1uqeZkWw.html

@iamsalia 2 жыл бұрын

Please I would like to know if this temperature sensor can work on poultry farms. Thank you

@robojax 2 жыл бұрын

Hello, it just senses the temperature and humidity and does not care about environment. Just make sure dirt does not cover it.

@sachinsadhale1789 5 жыл бұрын

Plz name the library to be included there are many dht Libraries

@robojax 5 жыл бұрын

I have provided the library from original source and from my own with my own code. I mentioned the link in the video and have provided the link under the video description.

@mohammednidal5206 3 жыл бұрын

can we code this along with autonomous obstacle avoiding code??

@robojax 3 жыл бұрын

Yes you can.

@dtn2529 Жыл бұрын

The DHT22 sensor enables temperature measurement in the range of -40 to 80°Celsius Does your program accept this? I.e it also shows negative temperatures?

@robojax Жыл бұрын

of course it does. if you get incorrect reading, either you have not selected the sensor in the code or there is wiring issue. I am assuming you have followed the instruction and installed the library. You may use the code for DHT22 from this video ignoring the WiFi feature kzfaq.info/get/bejne/gL5zltCLutPeqWw.html

@dtn2529 Жыл бұрын

Thank you very much for your reply. It is OK. Otherwise, you have very good, clear and understandable instructions. (Sory,google translation) @@robojax

@jasperblase1374 2 жыл бұрын

I know this is a bit of late but when I see the humidity readings on your video, it's very low. Is your room dry or just error from the sensor?

@robojax 2 жыл бұрын

I don’t remember what was the humidity but this sensor is very accurate.

@zhouri7758 5 жыл бұрын

Hello Can I take this code and make some changes to work with DHT11

@robojax 5 жыл бұрын

have you looked at the code? there is DHT11. just comment (select) the right sensor.

@zhouri7758 5 жыл бұрын

@@robojax no I have not Thanks

@arjaysibug843 5 жыл бұрын

just the same. 22 is just an upgraded version

@jrsbrothers6724 2 жыл бұрын

if the distance of the sensor is 20 meters with the arduino, can the sensor work?

@robojax 2 жыл бұрын

I did the search, found the information for you with the link from manufacturer. read the datasheet and id you did not find, it contact the manufacturer. Use ESP32 or ESP8266 to read it over wifi. Search my channel. Here is how to find Specific KZfaq Video in a channel bit.ly/findKZfaqVideo

@Fubo777 3 жыл бұрын

Would it be possible to use two of these sensors simultaneously with Arduino?

@robojax 3 жыл бұрын

Hello, yes you can use the idea from this video kzfaq.info/get/bejne/gpyVns9jpqjHpY0.html to use two or more of this and here is how you can see it temperature from this sensor on mobile phone kzfaq.info/get/bejne/Z6dkYJmZqae2gZc.html

@Fubo777 3 жыл бұрын

@@robojax Thank you very much. I'm thinking of making a simple weather station that shows indoor and outdoor humidity and temperature

@divakarans8015 4 жыл бұрын

Hi, why we had resistor in data pin

@robojax 4 жыл бұрын

Hi, I have replied to this in one the comments earlier. Please scroll down.

@ELKopps11 Жыл бұрын

Mine fails. In troubleshooting if found that "nan" is in temp_hum_val[0] and 0 is in temp_hum_val[1].

@robojax Жыл бұрын

Nan means wiring is incorrect

@scottwaters7286 4 жыл бұрын

Why do I get "Sync timeout"?

@robojax 4 жыл бұрын

I haven't see it but google search showed this forum.arduino.cc/index.php?topic=91569.0

@divakarans8015 4 жыл бұрын

Hi, I'm using Dht 22, & I'm receiving *Nan%* errors, pls solve

@robojax 4 жыл бұрын

bad wiring

@azwaqar 5 жыл бұрын

i get this error "Error compiling for board Arduino/Genuino Mega or Mega 2560" how to solve it????

@robojax 5 жыл бұрын

port problem. Try to select the right port.

@azwaqar 5 жыл бұрын

Thanks for reply the error was due to missing library I download it and error disappear thank you

@Paul7mac 4 жыл бұрын

@@azwaqar which library i have the same problem

@humanfromthefuture4430 4 жыл бұрын

failed to read dht sensor what happenned

@robojax 4 жыл бұрын

incorrect wiring, bad pin connection or bad modue.

@mikahjbvf8166 5 жыл бұрын

Hi.. why did i get 'Failed to read from DHT sensor!' ?

@robojax 5 жыл бұрын

Wiring problem. Check all 3 wires.

@mikahjbvf8166 5 жыл бұрын

@@robojax ok.. thank you.. i'll try

@chawinchokchaimongkolkij563 5 жыл бұрын

DHT22' was not declared in this scope

@robojax 5 жыл бұрын

You have not downloaded the library. Make sure to download and add it to the Arduino library folder. or if you have included the library make sure to uncomment the line // #define DHTTYPE DHT22 // DHT 22 by removing the // from the beginning of the line. Watch video for instrcution

@aswathy1609 Жыл бұрын

code pls

@robojax Жыл бұрын

I just watch the video . You skipped the first 40 seconds where I mentioned how to get code.

@stelaririna 2 жыл бұрын

Why does it read that my humidity 99.9% and temperature 129.9°C. And both don’t change no matter what

@robojax 2 жыл бұрын

It could be wiring problem

@stelaririna 2 жыл бұрын

@@robojax and if it’s not a wiring problem, what other cause can it be?

@robojax 2 жыл бұрын

Not sure, perhaps wrong model is selected in code.

@stelaririna 2 жыл бұрын

@@robojax can the sensor be broken? Cause I checked the wires and the voltage and amps are good, the code is good, I picked the right model, but the reading won’t change no matter what I do

@robertomalatesta6604 2 жыл бұрын

@@stelaririna na You might try and reload the bootloader. Then run the Blink scketch and if it cycles a few times only or not at all, the board might have gone astray.