Probably not, the ultrasonic sensors are fairly large so physically it might be a challenge to get useable readings.
Pete.
hi mr. pete âŚ
please give me a schematic of the circuit
Is this not enough�
Pete.
Looks like its time to sort-out that mess of wires behind your monitor 
As far as the error message is concerned, the code in Post #1 of this topic compiles fine for me, so I assume that you have a problem with the way that your Blynk library is installed, or you have an old version (older than 0.6.1) of the Blynk library installed.
BTW, Ctrl-Alt-PrtScn is a better way of copying the active window so that it can be pasted into your post, rather than taking a photo of the screen (and the wiring behind).
Pete.
thank you sir, I have successfully uploaded this coding. one more, how do you make this blynk? I have trouble making it, I beg you to teach me to make this blynk ,? Thank you, Mr. Pete
I donât understand the question.
Pete.
I canât make blynk, please tell me the tutorial
I have absolutely no idea what it is that you are asking me to help you with.
Explain what the issue is, in words other than âI canât make blynkâ, and Iâll try to point you in the right direction.
Pete.
I have trouble making the parameters in the blynk application ⌠can you show me the way? I want parameters like you created
Itâs all documented in the codeâŚ
Pete.
The widget you have connected to V8 doesnât look like a terminal widget to me.
Pete.
then I have to install v8 on what widget?
Pete.
'filterSamples` is the number that is used for the smoothing calculations and as the code says it must be a odd number and must be at least 3 or larger.
The code doesnât include any relay control logic. I guess this is because it depends on the type of relay that youâre using (active HIGH or active LOW) and what that relay controls.
If you had a scenario where water was being pumped into a holding tank, and you wanted to start the pump when the level reached a lower limit, and stop the pump when it reached a higher limit, then the logic would be much different to if the scenario was about a tank that was filling via rainwater and you needed to know if there was sufficient water to operate a sprinkler system, or if there was too much water which needed to be vented.
Pete.
I wouldnât have thought so.
You have the Step set to 0. This means that every time you press the â+â or â-â symbols of the step widget the current value will change by 0 (in other words, it wonât change at all).
You have the upper limit set to 7,000 and the lower limit set to 0, and 7,000 is the starting value. This means that when you change step value to, lets say 100, and run the project then the step widget will display 7,000 and only the â-â symbol will have any effect, as you are already at the maximum. This may be what you want, but donât be confused by this behaviour.
Pete.
Ok, thx sir,
I get it