Basically, I'm trying to power both the Arduino and the Sensor with 2, 2200mAh 18650 batteries and then upload data over bluetooth.
I only have some complications on the powering side because I have next to zero idea on how that works.
I appreciate the help. Thanks!
See your other topic post #26
Sorry I cannot follow your frizzy.
Some of the parts shown may work, but the NPK sensor is a fraud.
The numbers it produces have no useful relationship to the soil concentrations of any form of nitrogen, phosphorous and potassium.
Oh no... Do you have any more articles/research showing how it is a fraud?
I would like to inform my mates in it so we can re-evaluate our idea.
Thanks!
The gizmo measures soil conductivity and invents some numbers.
As any chemist or soil analyst can explain to you, it is utterly impossible to determine soil N, P and K concentrations, in their various forms, by measuring soil conductivity.
You need a soil testing lab for that, full stop.
If you don't believe me, convince yourself by buying one. Take measurements with it, then take those soil samples to a reputable testing lab and have them analyze the soil. Compare results.
That's gotta suck.
Our whole thesis paper is about that sensor.
Are there any sensors I could rely on that does essentially the same thing on the soil?
No, they are all scams. A soil testing lab is your only option to measure total soil N, P and K content.
I suggest to do some reading to learn why this is the case. Nitrogen, for example, exists in soil in dozens of different chemical compounds, starting with N2, NO, NO2, nitrate, urea, amino acids, etc. Likewise for P, although there are fewer significant combinations.
You could change your thesis to reveal the scam. Do what I suggested above (compare sensor results with those from professional soil analysis), take apart some examples of the fake NPK sensors, determine their actual function, and explain why this doesn't work.
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Sorry, that's not really how thesis works in my field in college.
We have to make something to graduate instead of doing actual research on things like these. Other fields might be able to make use of this finding but for us, the whole goal of our research is to either make a system, build a system with hardware, or do things that are similar to the above.
We might be restarting from the ground up in this case.
Oh man, that just sucks.
In that case, why are you here trying to get us to do your work. That is called cheating.
Sorry to hear that. Sounds like you are not getting a modern education.
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I'm not really. I'm just asking if I'm doing anything wrong because we're on the cheap side of the spectrum.
And handling all these voltages, current and amps can break components which might give us a difficult time in terms of money, time, etc.
I'm not asking to code for the arduino, to make the whole thing. Just mainly asking if what I did in the schematic is correct.
Hopefully that clears your assumption.
3rd world education and all.
We can't really do much about it except do research on our own to learn about stuff that is not taught in our college.
Either way, thanks for all your input!
We will do some brainstorming again to hopefully try something that actually works.