Things used in this project

Hardware components:
Photon new
Particle Photon
×1
Particle PhotonPower Shield
×1
Project Box
×1
Antenna and Pigtail
×1
Autex Automotive Pressure Sensor
×1
Power Connector (Generic)
×1
Proto Board
×1
12V Power Supply
×1
Hand tools and fabrication machines:
Drill (Generic)
Variable Bench Power Supply (Generic)
Voltage Meter (Generic)
09507 01
Soldering iron (generic)
Wire Cutters (Generic)

Code

psilinearregression.inoC/C++
Code used to push psi, gallons in tank, and feet of water in tank to Ubidots and Particle cloud.
#include <Ubidots.h>

#define TOKEN "[insert your token here]"

Ubidots ubidots(TOKEN);

//initialize variables
double a3avg;
double psiavg;
double psiavg30;
double adjGal;
double adjFt;
unsigned int countSec;
double bigPicture;

//start timer 
Timer timer(5000, Update20TimesAMinute);

/*
    Returns the PSI which can then be displayed,
    or used to calculate other variables 
    @param The raw data
    @return The PSI
*/
double Psi(double data)
{
    return data*0.0304-12.313;
}

/*
    Returns the number of gallons in the tank
    which can then be displayed,
    or used to calculate other variables 
    (new conversion psi to gal)
    @param The PSI
    @return The number of gallons in the tank
*/
double AdjPSIToGallons(double data){
    return (12922.0*data)-878548.96;
}

/*
    Returns the feet of water in the tank
    which can then be displayed.
    psi to ft (technically gal to ft)
    @param The PSI
    @return Feet of water in the tank
*/
double AdjPSIToFt(double data)
{
    return AdjPSIToGallons(data)/5287.0;
}

/*
    Returns a value fron data between 
    the desired min and max
    @param input/data
    @param minimum
    @param maximum
    @return clamped data
*/
double clamp(double input, double min, double max){
    if(input>max){
        return max;
    }
    if(input<min){
        return min;
    }
    return input;
}

/*
    Return the calculated a3avg.
    @param raw data from a3
    @return a3avg
*/
double updatea3avg(double a3){
    return a3avg*0.95 + a3*0.05;
}

/*
    Return the calculated psiavg.
    over 5 seconds.
    @param PSI
    @return psiavg
*/
double updatePsiavg(double psi){
    return psiavg*0.95 + psi*0.05;
}

/*
    Return the calculated psiavg30.
    over 1 minute 40 seconds.
    @param PSI
    @return psiavg
*/
double updatePsiavg30(double psi){
    return psiavg30*0.998 + psi*0.002;
}

/*
    Makes a more granular average by
    only updating every minute.
    Used for zooming out on ubidots
    without the page freezing.
*/
void updateBigPicture(){
    if(countSec%12==0){
        bigPicture=psiavg30;
        ubidots.add("BigAverage", bigPicture);
    }
    
}

/*
    Pushes variables to Particle.io
*/
void updateParticle(){
    Particle.variable("psi", &psiavg, DOUBLE);
    Particle.variable("psiavg30", &psiavg30, DOUBLE);
    
    
    Particle.variable("Adjusted Gal", &adjGal, DOUBLE);
    Particle.variable("Adjusted Ft", &adjFt, DOUBLE);
    
}

/*
    Pushes variables to Ubidots
*/
void updateUbidots(double psi){
    ubidots.add("psi", psi);
     ubidots.add("psiavg", psiavg);
     ubidots.add("psiavg30", psiavg30);
     
     ubidots.add("Adjusted Gallons", adjGal);
     ubidots.add("Adjusted Feet In Tank", adjFt);
     
     ubidots.sendAll();
    
}

/*
    Sets up program to run:
    Enables the external antenna
    Sets up time for counting
    Sets variables to useful numbers
    Starts timer
    Pushes data to particle
*/
void setup() {
    STARTUP(WiFi.selectAntenna(ANT_EXTERNAL)); 
    Particle.syncTime();
    
    a3avg = (double) analogRead(A3);
    psiavg = Psi(a3avg);
    psiavg30 = psiavg;

    
    adjGal= AdjPSIToGallons(psiavg30);//number of gallons in the tank
    adjFt=AdjPSIToFt(psiavg30); //hight of the water in the tank
    

    
    countSec=0;
    updateBigPicture();
     
    timer.start();
    
    updateParticle();
}
/*
    Vestigial. Required but not used.
*/
void loop() {

}

/*
    Main method.
    Gets raw data and uses it to update 
    and push variables.
*/
void Update20TimesAMinute()
{
     int a3 = analogRead(A3);
     double psi = Psi(a3);
     
     a3avg = updatea3avg(a3);
     psiavg = updatePsiavg(psi);
     psiavg30 =updatePsiavg30(psi);
     
     
     adjGal=clamp(AdjPSIToGallons(psiavg30), 0, 116300);//number of adjusted gallons in the tank
     
     adjFt=clamp(AdjPSIToFt(psiavg30),0,22); //height of the adjusted water in the tank
     
     
     updateBigPicture();
     updateUbidots(psi);
     
}

Credits

Photo
Katelyn Rule
1 project • 2 followers
Contact

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