My voltage is reading zero no matter what I do. Does this mean I need to replace the 0.5 mol/L NaOH filling solution? Or am I simply not handing the code correctly? Thanks!
Hi, thank you for the great video. Odd question here, does the electrode of the probe touch the membrane? I'm asking because I recently bought one. Thanks in advance
Hello, so i want to use this sensor and been following this tutorial but always ended up with the adc raw and voltage not stable. it value could go higher or lower by a lot of margin without any change of the liquid. pls help or recomend any solution, TIA!
I'm using the filling solution with 100ml with 2g sodium hydroxide and trying to calibrate but the value is too low, 3 - 4 mg/L. should I change the membrane cap? Thanks
Esp32 has 12bit adc. This code is written for arduino and esp8266 which has 10 bit adc. You have to modify code for 12bit adc for esp32. Also the ESp32 adc in not linear as well which will give incorrect readings.
Thank you so much for such a very good and nice video, it is helpful a lot. I already subscribe to your channel. I have some question about the quality of water to prepare the solution (purified,...)? and if we need a temperature sensor near the D.O probe if the temperature inside we expected changing? Thanks
@@L2505 am order to test result is work. we can dip in along time just we must replace 0.5%MOL naoh and new calibration every month on fresh water condition .
Hi earlier I have Accurate results in my DO readings which is 5000 plus and ADC voltage is 1000 plus but then things go wrong and i dont know why is my adc voltage showing 0 to 20 or sometimes 200 something and my DO reading is constantly showing 201 or 79 and the results are so random. Please answer I really need to finish my project thanks.
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your voice is stressing me outttt
Thank you so much for the video. I was eagerly waiting for this video. I'm happy that you made a video on this topic. Thanks a ton.
Thanks you can use this for your project
Very nice project
My voltage is reading zero no matter what I do. Does this mean I need to replace the 0.5 mol/L NaOH filling solution? Or am I simply not handing the code correctly? Thanks!
any solution?
do the wiring on the ADC pin in ESP/Arduino etc not the usual GPIO pin, then the ADC value will appear in your serial monitor
Hi, thank you for the great video. Odd question here, does the electrode of the probe touch the membrane? I'm asking because I recently bought one.
Thanks in advance
Thank you.. nicely explained..
Hello, so i want to use this sensor and been following this tutorial but always ended up with the adc raw and voltage not stable. it value could go higher or lower by a lot of margin without any change of the liquid. pls help or recomend any solution, TIA!
I was create project for agricultural sistem 3 years ago using this sensor
What's required current for the given DO sensor
Excelent video!
Hi, I have an existing project using Analog DO sensor. What is your coding if we intend to have 3 pcs of Analog DO sensor?
if I combine it with the ds18b20 temperature sensor, where is the code changed?
Hi, sorry, I have a problem with the megavolt output, these reach 1200 and the temperature stays at 21. Can you help me?
Sorry I asked which was the first liquid mixed with water and naoh?
Your voice fell in love💘
I'm using the filling solution with 100ml with 2g sodium hydroxide and trying to calibrate but the value is too low, 3 - 4 mg/L. should I change the membrane cap? Thanks
No thats fine
@@HowtoElectronics but 4 mg/l is not healthy right? It should at least 7 or 8 mg/l, cmiiw
Yes more than 8 is good
@@HowtoElectronics then how come mine doesnt have 7 / 8 mg/L. Is it the sensor is broken?
Very nice video.
what should i change in the code if im going to use esp32 with ads1115 the vreff will remain the same ?
Could you please provide a link to order sodium hydroxide flakes?
Is that 20g on 1L, it looks like a 100mL only.
Same concern
What Do sensor will you prefer for using in monitoring a lakes?
same question here
I am using ESP32 as a microcontroller does the Voltage Reference that I would put in my ESP32 code is also 5000 mv the same the VREF in Arduino?
Esp32 has 12bit adc. This code is written for arduino and esp8266 which has 10 bit adc. You have to modify code for 12bit adc for esp32. Also the ESp32 adc in not linear as well which will give incorrect readings.
@@HowtoElectronics what voltage reference value should I put in ESP32 to make an accurate reading
How much is this sensor power consumption or current draw at 5V?
informative video....
I got raw ADC value of around 1000ish ranging form 1080-1500, is this normal?
Thank you so much for such a very good and nice video, it is helpful a lot. I already subscribe to your channel. I have some question about the quality of water to prepare the solution (purified,...)? and if we need a temperature sensor near the D.O probe if the temperature inside we expected changing? Thanks
I have voltages 3242 and raw 664
Hi. I'd like to try the two point calibration but my question is, what am I gonna do with this line of code?
#define READ_TEMP (25)
nice video
Great video, Could you please provide the link to order this sensor?
You can purchase from DfRobot
Nice one bro
Is it work on ESP32?
If you don't stir it up, the sensor doesn't work properly.
Can I use this the sensor with ESP8266 or ESP32? Can I use Arduino libraries with ESP?
Of course you can use.
@@HowtoElectronics what code in program should I change if I use this sensor with ESP32 sir? should I change VREF and ADC to 3300 and 4095?
For the calibration, do you use just normal water or it need pure water ?
Normal water. Pure water will be best.
@@HowtoElectronics Please what do you mean with pure water?
How to clean it ?
*_Great job!_*
Where can I find this sensor? here in Brazil is so difficult to find that
Buy from DfRobot official site
can we dip DO probe in water along time (more than 1 month ) ?
I need to know too
website says that you can have the probe in water indefinitely
@@L2505 am order to test result is work. we can dip in along time just we must replace 0.5%MOL naoh and new calibration every month on fresh water condition .
@@megthurrell2849 thanks.
what software that you are using to generate circuit at 9.28?
Same question here!
I wanna know that too, I need to do something like that for a project.
Purchase link for DO Sensor : www.graylogix.in/product/dissolved-oxygen-level-sensor-for-arduino
Can I get your Arduino code?
Hi earlier I have Accurate results in my DO readings which is 5000 plus and ADC voltage is 1000 plus but then things go wrong
and i dont know why is my adc voltage showing 0 to 20 or sometimes 200 something and my DO reading is constantly showing 201 or 79 and the results are so random. Please answer I really need to finish my project thanks.
Please calibrate the sensor again
@@HowtoElectronics I calibrated the sensor just now and the output is 0 raw and 0 voltage...
May be you damaged the membrane cap. They are delicate and fragile and has huge sensitivity. Replace that.
@@HowtoElectronics I replaced it with the spare one but its always same results I think my sensor is faulty :(
I tested the sensor in a 36 defrees celsius water then things started to go wrong
how much water use?
1 liter or 50 ml?
Prepare 0.5N Naoh solution.
This can be prepared by mixing 20gm Naoh in 1 liter of water. Or same ratio.
@@HowtoElectronics but why do i see only a little water is used?
did you not use 1 liter of water? thanks
Use the same ratio like 20gm/1000ml
@@HowtoElectronics means that you can not put liquid into the membrane cup ??
1 litre of water but only use 50 ml ?
Yes
اش هاد لعجب
please check your instagram dm im looking forward to have more discussion wth you
Will the sensor give an output of DO below 7 even if the temperature is set as 25 degrees?
Need to check that practically bro