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 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.
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.
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.
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.
@@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.
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.
I know I'll always get the straight dope here. Well-reasoned, detailed, rarely biased and always clear. I get all the info I need to make a decision that is best for me. Thanks.
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 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.
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.
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.
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.
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.
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!
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
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.
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.
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.
@@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.
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.
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
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.
Fantastic video! Thank you for making these. Are there sensors where the receive and transmit modules are separate units? This would be great for measuring the distance between two moving objects. Any help here will be much appreciated.
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?
have made one 3 years ago and it sends all my tank information to the web, now I have designed a until that uses ESP 32 with Water proof transmitter and receiver as well as pump control circuit all with LCD display and web server
Hello Bob. Sorry if I misspell in English. I'm not very fluent yet. I read that you have done this project with an LCD screen, and since I deduce that it is more difficult to graph the information on an LCD than on an LED strip, I would like some advice to develop my project Which consists of replicating a vehicle parking sensor. 😅 I don't want to buy one! I want to do it myself! 😂 But I'm very new to C programming. And any help would be very welcome. I've been looking for examples on the internet for days, but nothing like what I want to do. I describe how it works: I would like to make 2 RGB led bar (front and back) that presents the distance (Green, yellow, and red), and location (left, center and right) in a fluid way all over the led strip using an array of 8 JSN-SR04T sensors. (4 in front and 4 behind). I would love, if possible, for you to guide me in this project! 🙏
@@raulcid2369 that is very ambiguous project for beginner , but there are many or very similar projects on the web using an Arduino just for starters. So try a few simple ones first they work yourself up to more complex projects
after long research we have a new technology to send data over dc lines so no need to connect 4 wires of ultrasonic module just use same dc line between module and MCU to supply module & get data
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.
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.
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) ;-)
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
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
Okay, I’m answering a couple of years later. But I’ve been doing this exact thing. Yes, these work for measuring the water level, and they get a good reading from the surface of the water. The problem you will encounter is minimising reflections from other objects. Consensus is that if you somehow mount this sensor into a pipe and drop that pipe down into the tank, you’ll only get readings from the water surface, and not other objects. I managed this by 3D printing a mount for the sensor to insert into a pipe. The alignment of this mount is critical in getting reliable results. It has taken a few different designs. I’ve had it running reliably in two out of my three sumps for years. One of the sumps for some reason just never gets that level of reliability. Today with flood alerts in London I am revisiting my design!
Programming error "unsigned char CS" is being use by the Arduino WiFi board. It took me long enough to find the reason for the error. The variable "CS" is being used by the WIFI board, Just thought you would want to know. I'll try a different char.
Hello Sir, your explanation is very helpful for me. My background is in civil engineering with zero knowledge of Arduino. I am starting to learn to use Arduino Uno R3 for my lab research. By following your instructions, I successfully can install and read the single data from an A02YYUW sensor. However, I need to install two sensors in one Arduino board and read the data from the two simultaneously. Can you give me an example code for it? It will help my study. Thank you.
Prayers for your mother and you, I'm 75 now and have been through it. I'm new to the Arduino IDE, I'm getting an error while running this code for Mode 1. It reads "unsigned char CS", anything I should have turned on or off in the IDE, or maybe a library I need to not include.
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!!!
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?
The AJ-SR04M is vary unstable,,, Shure you can get stable readings, BUT those stable readings will change, to OTHER stable readings depending what is located around the pcb of the device.... EMI..... Example.. put the device (PCB) in a plastic case ,, you get stable reading of say 111.x Now lay a 12 gage wire not connected to anything across the top of box and reading changes to a stable reading of 22.x .... We did shield the pcb, but this type of thing still happened..
Hello, I have a reolink camera with a pir sensor and want to make it into a underwater dome but need another sensor then the pir for activating the camera when motion is detected. You think i can replace the pir in de camera with this one ?
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?
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!
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!
There's a video that tried extending the cable but failed. I believe it is some sort of a co-axial cable. They ended up extending the wire from the control board or the micro controller connected to the control board
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
Hi teensy recently make Code Security & Lockable Teensy can you please make a video the procedure to do it and verify if it’s really secure and how secure , I thought you the only one can do such a thing clearly and covers all that Thank you so much you the best.
Sir it's humble request to make vedio on EMI which effects on electronics and MCU's on switching loads like induction motors it creates malfunction in programs 🤔
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
It might be interesting to try and measure the distance to an object while it's raining. I would guess the rain drops would interfere with the sensor's ability to accurately measure distances, but I haven't tried it so I really don't know. Perhaps you could test that. You also might consider mounting one of these devices on a servo so you can sweep an area with the sensor or direct it to specific locations...Just a few thoughts. Have a great day.
I have a JSN-SR04T in mode 5 monitoring my front door which triggers a chime and activates a camera when someone is close, so far it hasn't triggered with rain but I have some blurry video footage of passing magpies.
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 think maybe you can setup a blacklist to auto-flag comments. Like "prize, winner, telegram". 1/1000 will be legit comments but it is what it is.
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.
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
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.
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.
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.
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 know I'll always get the straight dope here. Well-reasoned, detailed, rarely biased and always clear. I get all the info I need to make a decision that is best for me. Thanks.
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 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
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!!
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.
Just in time! To use as water level of my RV tank. As well as depth meter for my small boat.
Thank you Master
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.
Lovely to see a new video today, thanks for the great work!
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.
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!
This is pure gold. Thank you so much!
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
Wonderful job, I am working on a driveway gate project and you have helped tremendously. Thank you.
Fantastic video Bill, thank you. Just the inspiration I need to get off my butt and work on my own measuring project!
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.
Great video with good explainations and good code. Thank your for sharing all of that
Your video production quality is perfect
As always very nice and helpful. The videos are very professionally made, making the complex content easier to understand. Thank you very much Bill
A very clearly discussed tutorial. Thank you!
Thank you so much. You solved my issue..
Thank you for the great video, it's very well explained!
Wow! A new and exciting video after a long time! 😀🎉
I was giving up on ultrasonic sensors for outdoor use because mounting behind glass would not work. Thanks for this vid
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.
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.
@@ccmangb Did you find a sensor that could possibly work for over a year?
Thanks for the precision of youy vidéos. (I'm french, excuse me for the writing)
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.
Which sensor did you end up using?
Bill, excellent video on sonic sensors. Thanks
Many thanks for this very interesting video.
This is so cool!! This helped me a lot in my project! Thank youuuu
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
Perfectly presented, thank you!
Your content is always so good!
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.
Fantastic video! Thank you for making these. Are there sensors where the receive and transmit modules are separate units? This would be great for measuring the distance between two moving objects. Any help here will be much appreciated.
Thank you sir for your detailed video. Very much helpful.
Great class.
Keep up the good work.
Thank You,
Natasha Samuel
Thanks a lot for this video. It is very helpful.
Very interesting I will probably the AOYYUW in my out door Robot project.
Thank You. Gives me the idea to mount on my Splash Drone 4 by SwellPro.
Your videos are great and useful.
thanks a lot for details of jsn sr04t details.
very high quality explaination. Good job... i follow you now
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?
have made one 3 years ago and it sends all my tank information to the web, now I have designed a until that uses ESP 32 with Water proof transmitter and receiver as well as pump control circuit all with LCD display and web server
Hello Bob. Sorry if I misspell in English. I'm not very fluent yet.
I read that you have done this project with an LCD screen, and since I deduce that it is more difficult to graph the information on an LCD than on an LED strip, I would like some advice to develop my project Which consists of replicating a vehicle parking sensor. 😅 I don't want to buy one! I want to do it myself! 😂 But I'm very new to C programming. And any help would be very welcome. I've been looking for examples on the internet for days, but nothing like what I want to do. I describe how it works:
I would like to make 2 RGB led bar (front and back) that presents the distance (Green, yellow, and red), and location (left, center and right) in a fluid way all over the led strip using an array of 8 JSN-SR04T sensors. (4 in front and 4 behind).
I would love, if possible, for you to guide me in this project! 🙏
@@raulcid2369 that is very ambiguous project for beginner , but there are many or very similar projects on the web using an Arduino just for starters. So try a few simple ones first they work yourself up to more complex projects
I had also made something similar but facing come issues.... Like reading from a02 is not consistence some times...
after long research we have a new technology to send data over dc lines so no need to connect 4 wires of ultrasonic module just use same dc line between module and MCU to supply module & get data
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.
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.
Any video for the new A22 ultrasonic sensor made by DIY?
Are u able to give me a little help with a tft screen
Please make a cyclocoptor and how we can make drone that are less noise
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) ;-)
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
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
Thanks
Need sensors for tank level measures in my van. But... If you use them over liquid, do they get a decent reflection from the water?
Yup, I have the same question
Count me in for the answer.
While we are at it, would they work for oil level in a heating oil tank? It can be quite cold in our house if it runs out. 😁
Okay, I’m answering a couple of years later. But I’ve been doing this exact thing. Yes, these work for measuring the water level, and they get a good reading from the surface of the water. The problem you will encounter is minimising reflections from other objects. Consensus is that if you somehow mount this sensor into a pipe and drop that pipe down into the tank, you’ll only get readings from the water surface, and not other objects. I managed this by 3D printing a mount for the sensor to insert into a pipe. The alignment of this mount is critical in getting reliable results. It has taken a few different designs. I’ve had it running reliably in two out of my three sumps for years. One of the sumps for some reason just never gets that level of reliability. Today with flood alerts in London I am revisiting my design!
@@MatSmithLondon thanks. Good luck with the floods, lots around here in Herts.
Great videos as always!
Thanks a lot. really Helpful
Nice video, mate.
Programming error "unsigned char CS" is being use by the Arduino WiFi board. It took me long enough to find the reason for the error. The variable "CS" is being used by the WIFI board, Just thought you would want to know. I'll try a different char.
Hello Sir, your explanation is very helpful for me. My background is in civil engineering with zero knowledge of Arduino. I am starting to learn to use Arduino Uno R3 for my lab research. By following your instructions, I successfully can install and read the single data from an A02YYUW sensor. However, I need to install two sensors in one Arduino board and read the data from the two simultaneously. Can you give me an example code for it? It will help my study. Thank you.
Prayers for your mother and you, I'm 75 now and have been through it. I'm new to the Arduino IDE, I'm getting an error while running this code for Mode 1. It reads "unsigned char CS", anything I should have turned on or off in the IDE, or maybe a library I need to not include.
Hi, did you find a solution? I'm stuck with a similar problem as well
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!!!
Why use the white connector board. Your initial diagram shows direct connect for Arduino to sensor.
What would be the best sensor for a fish finder?
Nice
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 inputs. need separate water proof ultrasonic sensors
The AJ-SR04M is vary unstable,,, Shure you can get stable readings, BUT those stable readings will change, to OTHER stable readings depending what is located around the pcb of the device.... EMI..... Example.. put the device (PCB) in a plastic case ,, you get stable reading of say 111.x Now lay a 12 gage wire not connected to anything across the top of box and reading changes to a stable reading of 22.x .... We did shield the pcb, but this type of thing still happened..
Another excellent video.
Hello !:) Can you somehow use these ultrasonic devices to agitate water? i.e. make some movements so it does not just stand still
Wow this is sooooo good
Hello,
I have a reolink camera with a pir sensor and want to make it into a underwater dome but need another sensor then the pir for activating the camera when motion is detected. You think i can replace the pir in de camera with this one ?
so you can measure up to 2,4meters?
I wonder how to make an output graphical screen that represents the data relevant provided by the sensor?
Anyone knows were to start?
any experience with JSN-SR20-Y1? Txs
What is the maximum range of these sensors?
Thanks
Lee
I want get the speed of water level decreasing so what will be the added line of code, CAn u help sir?
Thanks for some very useful stuff much appreciated.
Thank you so much
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?
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!
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!
There's a video that tried extending the cable but failed. I believe it is some sort of a co-axial cable. They ended up extending the wire from the control board or the micro controller connected to the control board
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
Amazing video... as usual! Where can I buy the A02YYUW? Thanks in advance!
Hi teensy recently make Code Security & Lockable Teensy can you please make a video the procedure to do it and verify if it’s really secure and how secure , I thought you the only one can do such a thing clearly and covers all that
Thank you so much you the best.
If I want to make a sonar for sea floor mapping could I use one of these?
Sir it's humble request to make vedio on EMI which effects on electronics and MCU's on switching loads like induction motors it creates malfunction in programs 🤔
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
Do you have a bug in my office? What's this timing? PERFECT!
How can you daisy change them together? Say I had more sensors to put in how would that work.
It might be interesting to try and measure the distance to an object while it's raining. I would guess the rain drops would interfere with the sensor's ability to accurately measure distances, but I haven't tried it so I really don't know. Perhaps you could test that. You also might consider mounting one of these devices on a servo so you can sweep an area with the sensor or direct it to specific locations...Just a few thoughts. Have a great day.
I have a JSN-SR04T in mode 5 monitoring my front door which triggers a chime and activates a camera when someone is close, so far it hasn't triggered with rain but I have some blurry video footage of passing magpies.
You could also take ~100 measurements (or how many you want) and calculate mean (or median) and use that value, rain won't be an issue then.