Waterproof Ultrasonic Distance Sensors - JSN-SR04T & A02YYUW 💧☔
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- Опубликовано: 19 июн 2024
- Today we will take a look at the JSN-SR04T and A02YYUW Waterproof Ultrasonic Distance Sensors. We will see how they work outside, and we’ll even test to see if they work underwater (spoiler alert - they won’t!).
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When we think of ultrasonic distance sensors, chances are we are thinking of the popular HC-SR04. After all, it’s simple to use, it works pretty well, and it is very inexpensive.
But while the HC-SR04 is a great sensor for indoor use, it isn’t really suitable for use outdoors. It is susceptible to dirt, it’s relatively fragile and, most importantly, it isn’t waterproof.
So today I’ll be examining a couple of ultrasonic distance sensors that are fully waterproof. They also are more advanced than the HC-SR04, as they are both capable of calculating the distance measurement by themselves, without the aid of a microcontroller or microcomputer.
The JSN-SR04T is an interesting sensor for a number of reasons. First, it uses a single transducer, instead of a separate transmit and receive transducer. Second, the transducer is attached to the main circuit board with a 2-meter cable, allowing you to mount the waterproof sensor remote from the non-waterproof board. And third, it actually has six modes of operation.
The A02YYUW looks a bit like a large, rubberized HC-SR-04 in that it has a separate receive and transmit transducer. But that’s where the resemblance ends. This is a smart sensor that outputs serial data, and it can run on 3.3 or 5 volts.
We’ll hook up both sensors to an Arduino Uno and write some simple code to use them. And, as the JSN-SR04 and A02YYUW both use the same format of serial data, we can even reuse the same sketch for both sensors!
Here is the table of contents for today’s video:
00:00 - Introduction
01:33 - How Ultrasonic Distance Sensors Work
04:37 - Look at the two sensors
05:50 - Using the JSN-SR04T Version 3.0
13:12 - JSN-SR04T Mode 0 Sketch & Demo (HC-SR04 Emulator)
18:01 - JSN-SR04T Mode 1 Sketch & Demo (Serial Data)
21:13 - Using the A02YYUW
26:06 - Outdoor Tests
28:18 - Underwater Tests
30:00 - Conclusion
As always you’ll find an article accompanying this video where you can grab all the code I used, as well as pick up some more information.
Hope you enjoy the video!
Bill 
Хобби
Hi everyone - It's come to my attention that there has been someone masquerading as myself, responding to some comments here with a link to a Telegram chat to win a prize from me. THIS IS A SCAM, I am not holding a contest, nor do I have a Telegram account. PLEASE DO NOT RESPOND TO THESE MESSAGES!!
It's happening on a lot of my videos, I'm taking steps to remove them manually, but as I have 162 videos, it will take some time. If you do run across a suspicious comment, I would appreciate you letting me know at info@dronebotworkshop.com.
Thanks!
Bill (The real one!)
I have been watching your videos for quite a while now and there is only one word to describe your content and presentation - fantastic! Well done Sir, I just wish there were more channels like this on science related topics, but for Arduino, your channel has everything covered. Chris, UK.
Still one of the most comprehensive instructors on the internet! Thank you so much for the amazing info and time you put into the videos
I appreciate being able to use this device in the raining weather conditions, underwater sensor really spark the imagination, remotely monitoring your favourite fishing Hole, underwater robot etc.
This is the most in-depth dive on these things on the internet. Thank you for your time and effort in making this video...👍
I bought a robot that comes with couple of JSN-SR04T inside. Today I met a problem that the JSN-SR04T was not working properly.
Luckily I found your video, fully explained everything. And I understand very well about the sensor now. Saved me much time from looking across massive amount of information to solve the puzzle.
Another brilliant video. I watch these things over & over, & ALWAYS check here or our forum when I get stuck on a project. I'm looking to build a weather station, & I think one of these might be perfect as an outdoor sensor!
Just in time! To use as water level of my RV tank. As well as depth meter for my small boat.
Thank you Master
Fantastic video Bill, thank you. Just the inspiration I need to get off my butt and work on my own measuring project!
Lovely to see a new video today, thanks for the great work!
Your video has an excellent explanation of the theory and operation of both the JSN-SR04T & A02YYUW sensors. I had an application where I needed sensors to monitor the level of solution in two hypochlorite tanks in a water system. The JSN-SR04T has a "blind spot" that is too long to the application. I originally used two HC-SR04 sensors, but I was worried about the sensors getting wet. I found versions of the A02YYUW sensors that worked using the same pulse width modulation as the HC-SR04 so they were a 'plug and play' substitution. The sensors have worked for over two years with the only problem happening when workmen accidently 'disconnected one of the sensors (broke the wire). I believe that there are versions of the A02YYUW available that operate on PWM and could be directly substituted for the HC-SP04.
Thanks Bill for another excellent video. While I have no use for one of these after watching your video I am going to buy on to experiment with. You made it that interesting and easy! Thanks again.
Wonderful job, I am working on a driveway gate project and you have helped tremendously. Thank you.
His Video workshops are really something "GOLD".
Thank you Bill
Dear Sir! Thank you a thousand times! What you present is real science work! Thank you!!
A very clearly discussed tutorial. Thank you!
This has found me at just the right time. I'm planning water tank level monitors. Thanks Bill
I am thinking of a well monitor application. I like the idea of waterproof ultrasound, but need a range on the order of 60 - 70 meters.
hi Bill,
I made a water tank level sensor with the SR04T , it has worked well for a year now in a 25,000L plastic tank.
As the tank top is a dome I have an approx. 50cm air space to deal with the min. distance .
I mounted the sensor in an waterproof ABS box together with a small arduino, I send the data via a RS422 interface so you can have a display
Up to 500M away.
The box was mounted over a 50mm hole in the top of the tank.
One problem I encountered was condensation overnight. ( a drop formed on the sensor what gave a false reading)
The solution was to mount a 12V incandescent lightbulb inside the box and power it with 9V what makes the lamp last forever.
This solved the problem. I made 2 different read out units one for the pump shed and one for inside the house.
@@ray_glaze these sensors don’t work in a narrow tube ( echo of the wall) maybe a long pipe with a pressure sensor on top would work for you.
Wouldn't a pressure sensor do the job better.
@@johnnz4375 Interesting idea.
The pipe in question is 6 to 8" ID. Since I haven't found the range I need, so I have not worried about the spread. I did give some thought to interference with the pipe and wiring.
The well is capped, but not sealed. I'll have to think about how pressure responds to a change in water level.
I also need to broaden my search of sensor types.
Thanks for your reply.
Your content is always so good!
Thank you!
As always very nice and helpful. The videos are very professionally made, making the complex content easier to understand. Thank you very much Bill
Perfectly presented, thank you!
Thank you sir for your detailed video. Very much helpful.
I just wanted to say that your videos are incredible. I recommend them all the time to students who are interested in anything Arduino related. You are a great teacher and an incredible resource. Thank you for all your hard work.
Wow! A new and exciting video after a long time! 😀🎉
This is so cool!! This helped me a lot in my project! Thank youuuu
Thanks a lot for this video. It is very helpful.
Thanks a lot. really Helpful
Great video with good explainations and good code. Thank your for sharing all of that
Great class.
Keep up the good work.
Thank You,
Natasha Samuel
Bill, excellent video on sonic sensors. Thanks
Your video production quality is perfect
thanks a lot for details of jsn sr04t details.
Great videos as always!
Your videos are great and useful.
I like your videos, you are very precise and go into a lot of detail.
I think if you you wanted to use them in both water and air, you would need to receive raw data, some way to have you code know it was in air or water, then your code would use different formulas due to the different speeds of sound in air (340m/s) and water (1482m/s). (just guessing and temperature plays a role)
I don't have these sensors, but it may be a good experiment to do.
Thank You. Gives me the idea to mount on my Splash Drone 4 by SwellPro.
Thanks!
Thank you so much
Excellent video as always!! One thought though. For the JSN04 sensor in mode 0, could you not alter the constant to account for the fact that the sensor was underwater? Would that not then give accurate readings? Maybe something to try? Other than that, keep up the excellent videos!!!
Wow this is sooooo good
Another excellent video.
Again, just the coolest project! Thank you again, Bill!
I was thinking that the JSN-SR04T could be what I need to determine distance to ground of a landing model rocket, and I would like to integrate the JSN-SR04T with an Arduino Nano or a Raspberry Pi Pico. Would that work?
very high quality explaination. Good job... i follow you now
Thanks sir
Very interesting I will probably the AOYYUW in my out door Robot project.
There's a problem with the A02YYUW sensor if you're trying to meausure a fluid level in a 150mm PVC pipe. The sound reflections confuse the sensor and it gives the wrong readings (something similar happens if you put it at the domed apex of a water tank, or near the corrugations at the side). I found that narrowing the sound aperture by cutting a 50mm high piece of packing foam to fit over the sensor with a similar sized rectangular window for it to hear through fixes the problem.
Thank you very much for this video. I've watched multiple videos of these same sensors and it seems that in water the distance must be greater for them to work. This has something to do with how fast the sound returns in small spaces. IE there was a test where results from edge of water was not accurate, but from boat was accurate as it was over 3 meters.
Thanks for some very useful stuff much appreciated.
I was giving up on ultrasonic sensors for outdoor use because mounting behind glass would not work. Thanks for this vid
Thanks a lot, your projects are something which I always look for. In one of my earlier projects, I have waterproofed HC-SR04, fitted it on top of my 1000 litres water tank to find the distance between the top of the water surface and sensor. Further by putting the dimensions of my tank in the code, I calculate the exact volume of water available in my tank and using automation, turn ON / OFF the water pump to maintain the water level. Furthermore, I also calculate the flow rate of incoming and outgoing water in litre/min to know the consumption. The project also sends imp notifications on my mobile. Surprisingly the project is still working great.
Great Project. I had a few questions
Did you use an arduino board and ESP module ?
How did you waterproof the HC-SRo4
You can use any, arduino can be used in case you don't want to access the data over the internet. I used insulation tape for waterproofing the sensor module.
@@rupeshkoulge1616 But doesn't that ruin the readings if you cover the eyes of the sensor
Leaving the eyes(transmitter and receiver), you can cover everything nicely
Nice video, thanks :)
Thanks for the precision of youy vidéos. (I'm french, excuse me for the writing)
Nice video, mate.
very helpful
sound travels much faster in the water, so that would definitely affect the sensor's ability to get responding signals. At a close distance it is possible that the sensor would get the response before the signals have all stopped sending.
Now that's something I did not know!
Extremely well explained. Thanks. I used SR04 for a while to check water level in 1100liter tanks. But they keep failing every few weeks. Now I'm using the JSN-SR20-Y1 because I need to measure from 4 cm to about 120 cm. I also use mode 1 to read by serial after sending 55. It works most of the time, but somehow, it goes completely wrong for a while, then comes back, etc etc. On a full day, it may read bad distance once or twice, for an hour or two at the time. Have you tried this JSN-SR20-Y1 yourself?
Great Tutorial!! I have used this sensor for Tank water level monitoring. As this sensor works on ultrasonic waves so it even detects the bugs and flies inside a tank,, if any bug or mosquito passes in front of the sensor it detects it as rising water level. I used to get random readings all of a sudden due to this reason. Then I switched to another sensor that works more accurate in that case.
You can collect say, 100 readings, discard the extremes and average the rest.
thank you for the tutorials, it is informative and complete. can I make a request tutorial for Liquid pH sensor. thank you😁
Muchas gracias, su explicación me ayudó mucho.
Gracias me ayudo mucho, estoy haciendo un prototipo de control de agua en arduino, inicialmente use los sensores HC-SR04 y todo estaba perfecto, el sistema funciona bien, pero al cambiar al AJ-SR04M, empezarón los problemas, de inicio no leía los dos sensores que tengo conectados, después el rango era equivocado, use las librerias de newPing y luego Ultrasonic, sin obtener buenos resultados, al principio pensé que era algun error en la conexión al mudar el proyecto a una caja para usarlo, después pensé en que ta vez necesitaba algún tipo de libreria sin obtener resultados, pero gracias a su explicación y el codigo que amablemente compartió, me sirvió para entender como funciona el sensor y así probar y encontrar el error.
Gracias.
Saludos desde San Luis Potosí, México.
I've successfully tested the JSN-SR04T underwater although I rugged it in the rear and the sides. But if you take into account that sound speed underwater is about 4 times faster than in the air,the minimum distance it could read was about 85 centimeters. Maybe it was too long for being tested properly in a bathtub.
hey, I think you might wanna try this idea. I've never use JSN-SR04T transducer for underwater measurement but I did something with it same module (rival maybe?) it is AJ-SR04M, yet I changed the transducer with waterproof 200 KHZ Fish Finder transducer but still using the AJ-SR04M module as the driver. it probably still giving output at 40 KHZ but it work. I can get reading as high as 6 meter in my field test in some pool nevertheless the maximum range of AJ-SR04M is about 6.5 meters and because sound travel faster underwater, it should giving the maximum range for about at least 20 meter underwater. yet I've never tested in that range
you present is precise nice pace that can be followed. Really enjoy your videos and learn a great deal. Where did you find the detail specs. of the sensors ? (links would be great) ;-)
Amazing video... as usual! Where can I buy the A02YYUW? Thanks in advance!
Nice
Dear Bill, great video again as usually I must say.
My question is, I have a JSN-SR04T-2.0 board with a little different Mode configuration
can you help me out here??
Thanks in advance
Hello! Great video! How do I use the real time value selection on the RX? I know it has to be pulled low. Is that just putting that wire to ground? Thanks!
hey I really like your video. I've might have solution for you if you want to measure something underwater. you can use JSN-SR04T or AJ-SR04M as driver for fish finder transducer. just change the transduser with fish finder. the cheap one. I've tested it and it work
thank you greeting
Cool
Nice video. Question: Would it be possible to extend the cable on one of these sensors? My anticipated application is measuring the water level in a river, for which I want to attach the sensor to a beam above the water. Thanks!
Thank you for this very useful video. It is always a great pleasure to watch your channel:) I wonder if these sensors could be used to measure the height of water in a small tank (1m3)? The sensor could be placed at the top of the tank and facing down to the water level. Do you think it could work in this situation (ultrasonic sound rebounding on the surface, not on the walls. What about the angle of measurement/selectivity)? I was surprised that you did not try to put sensor towards the water level in your bathtub. Many thanks Bill !
Yes you can.
Hi Bill, I need to construct a sonic-driven buoy-release system to recover instruments deployed at about 10 m deep (maximum). Is there an economic transducer like these you discuss here that I could use for my underwater system? I was thinking of having two transducer, one onboard the research boat and one on the instrument payload on the sea bottom. Thanks for your guidance
Great
Do you have a bug in my office? What's this timing? PERFECT!
I'm quite sure that these would work underwater, but you should take in to account that the measured distance should be multiplied by 4, due to the ~4 times the difference of the speed of sound under water (speed of sound in air is 0.231 times slower than in water). I also believe that this increased speed of sound also means that a minimum measurable distance of the sensors would be 4 times higher than normally. This should be tested in a pool, not in a bathtub that is way too small for the quoted minimum distances of these sensors. Also there is way too much echo underwater in a small bathtub.
Would the rounded walls not affect the sound too? A bathtub doesn't really have a flat surface for sound to bounce back. It will always deflect instead of bounce straight back? Just curious - I definitely don't have facts
I've used the non waterproof sensors and waterproof sensors for years in a water tank to measure water level. The non waterproof ones will fail within a few months due to corrosion of the sensors. The jsn wasn't suitable because of it's high minimum sensing distance. The a02 is easy to use and so far has been working in a hot and humid environment for a year with no issues. I've also tried the expensive maxbotix waterproof sensors, but they were unable to read distance if the water was agitated during filling. The manufacturer confirmed this. The a02 comes in pwm and uart variants, I could only get the pwm type to work, in a similar manner to the normal sensors.
Can you please tell me what exactly the components you used in your system beside the a02 pwm sensor?
Thanks in advance
@@mesterhash7274 An arduino uno, an ethernet shield, a 3d printed mount for the sensor, and a POE splitter to power the arduino. BTW, the sensor also failed, but it took a little over a year. The other sensors failed within months.
You are a great instructor. I read somewhere that the minimum distance is 20 cm. I monitor water loevel in an IBC tote and when near the top it reads 19 or 20 cm then as the water is drawn off for irrigation it begins to read 21- 30 and at 31 cm it disables the pump so it wont burn out. If I get alot of rain, it refuses to read anything for awhile, maybe 2 days, but then it fires up and works again. Any ideas as to why?? Thanks to all who can help.
curious if you have thought of using LIDAR sensors instead of ultra sonic sensors? ( being as it's on an outside Robot?)
or would a lidar be the incorrect type for a robot?
Sir, is it possible to connect 2 of these to 1 arduino, put them opposite each other and trigger them at exactly the same instant and record the time it gets for each to measure the other's wave impact?
If that is doable, with 3 or four and a little math you can make a nice windmeter.
Hello !:) Can you somehow use these ultrasonic devices to agitate water? i.e. make some movements so it does not just stand still
Great inputs. need separate water proof ultrasonic sensors
I'd like to pipe the pulses into a ¼" tube to measure oil level. Do you think this will work?
Any video for the new A22 ultrasonic sensor made by DIY?
What is the max sampling rate one can achieve with an arduino and possibly using bit register shifting?
Do you know the best economical distance measurement sensor for underwater applications ?
If I want to make a sonar for sea floor mapping could I use one of these?
How can you daisy change them together? Say I had more sensors to put in how would that work.
Do you know any model that working properly under the water, we are trying to make a submarine vehicle and we have to map the pool or we should know whether we near of the wall or not
good
can the A02YYUW measure the water level when it is mounted above the water surface?
Can these units have a very narrow beam so it can only see a walkway width out to 600cm?
what about new edition of HC-SR04 - HC-SR04-2020? Its like standard SR04 but with I2C and serial protocol modes
What is the maximum range of these sensors?
Thanks
Lee
I’ve made a prototype that works on a LiPo 3.3v battery. The MCU goes to sleep, but I’m still getting leakage. Do you think it’s from the sensor? Would a breakout board be useful in my scenario to save power?
hey what if i got 2 - 4 sensor ultrasonic conection to a single microcontrol? what library should i use? or can i use SoftwareSerial Library to comunicate 2 or more sensor with UART?
I had been wondering if it was possible to waterproof an HC-SR04 so I could use it as part of a tank level project, now I see I don't need to. :) thanks
Def worth looking into. Maybe some type protective coating to stop corrosion
I have a question, i try to braodcasr a signal from the esp 32 and a jsn-sr04m-2 ultrasonicsensor but my readings are almost always 0 or 8000/9000 and that cant be right...even whit a simpel test code i cant get nice readings...what can i do ? Or how can i get in toutch whit you to fix it?
Hello DroneBot Workshop viewers, Can you help me out with the following question?
I like to use one of these sensors to measure the water-tank level the tank is 40cm x 100cm X150 cm deep with smooth concrete walls. The question is can i use these sensors or will sound bounce of the walls and mess up the reading? Or are there some other things to consider.
Would you have any advice on connectring JSN-SR04T to Raspberry Pi3B via UART pins 14,15? I enabled enable_uart=1 in boot config, I can see /dev/ttyS0 device appeared but I don't seem to ready any data off it with screen /dev/ttyS0 9600 command
I want get the speed of water level decreasing so what will be the added line of code, CAn u help sir?
Should A02YYUW work on a drone landing mechanism? Im trying to see if I can measure the distance on the landings and advertise the user of the drone if it is too close to the ground in agriculture applications
Regarding the JSN-SR04T sensor, please inform if this sensor is produced with NON-TOXIC materials, since it will get wet with the evaporation of the water inside the water tank and the drops will fall into the water in the box that will be consumed for drinking, cooking, etc. . Thank you very much.