htw22
July 12, 2021, 2:47pm
1
My project is Mollier's hx diagram.
Here I measure the room temperature (T) and the relative humidity (H)
I have already calculated all the required formulas on microsoft Excel to determine the absolute humidity (x) .
However, I have to enter these complex calculations in a C program.
For this reason I ask for your support.
It would be very helpful if someone could write the program in C for me.
I provide all the required formulas tp write this program.
Thank you very much.
Why do you have to do this? Homework?
htw22
July 12, 2021, 2:53pm
3
It's a project (my job) for the university.
Hi @htw22
What is the ultimate goal of this project?
RV mineirin
OK, show us the C program that requires the calculations.
Paul
Are you willing to pay for help ?
If so, there is a special forum section for asking for such help and this topic can be moved there. If not then you can get help but will b expected to do the programming yourself and to receive advice on errors or the best way to write it
Have you tried to write the program ?
htw22
July 12, 2021, 3:00pm
8
I am willing to pay, but I cant programming. I'm studying supply engineering.So I only know the basics of programming.
htw22
July 12, 2021, 3:02pm
9
I don't have a program.
The temperature (T) and the relative humidity (H) are given
You can use arbitrary numbers for this.
The absolute humidity (X) must be calculated.
I have ALL the formulas for that.
Good to know. Have you thought about posting the formulas?
htw22:
I am willing to pay,
Do you want this topic moved to Jobs and Paid Consultancy - Arduino Forum
htw22
July 12, 2021, 3:56pm
13
I can't put These formulars here bevor I can be sure that I will be helped.
These formulars of calculations was a lot of Work.
What are you talking about? The Mollier diagram is a century old, and this material is EXTREMELY well understood.
You can't expect to attract help without explaining the actual project.
htw22
July 12, 2021, 4:20pm
15
I have already explained the project..
"The temperature (T) and the relative humidity (H) are given.
You can use arbitrary numbers for this.
The absolute humidity (X) must be calculated.
I have ALL the formulas for that."
I need help programming the calculations that I already have.
I am Not sure if you understand what I mean.
htw22
July 12, 2021, 7:31pm
17
Of course, that's right. But that is only in g/m^3.
But I converted it to g/kg.
After that:
g/m^3/(101300/(287,058*Temperatur in K)
htw22
July 12, 2021, 7:36pm
18
Still, I can't program these formulars in C.
Suppose ah = absolute humidity in g/m^3. To convert that to g/kg (according to your formula) in C, use this line of code:
ah = ah*287.058*T/101300.0;
htw22
July 12, 2021, 7:44pm
20
Do you know how I can program this calculation-step in C?
Suppose we take 25°C and 40% relative humidity.
The code can be found in this thread
Hello world,
I'm working on a small project where I'm measuring temperature and humidity in my garret/boxroom and then transmit the data to a KNX based home automation system.
I'm using an Arduino Pro Mini and the Adafruit BME280.
I'm sucessfully reading out data and transmitting the raw values to the bus,
But now, I want the arduino to evaluate the values and calculate the absolute humidity.
The board is up and running and I can't really use it for testing, because it's logging so I'm aski…