eka sinambela / Mbed 2 deprecated mbed_measuring_temperature

measuring the salinity

Dependencies:   LinearAnalogSensors mbed

Fork of mbed_measuring_temperature by Mario Simaremare

main.cpp@5:d2b58a5771d7, 2016-06-02 (annotated)

Committer:
ekasinambela
Date:
Thu Jun 02 16:13:37 2016 +0000
Revision:
5:d2b58a5771d7
Parent:
4:49b028845be4
Child:
6:9de0807e2855
the salinity and temperature functions

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ekasinambela 0:da915495c7fc 1 #include "mbed.h"
ekasinambela 3:5baf5ad00c1c 2 #include <cmath>
ekasinambela 2:1aab63839dba 3 //#include <LinearTemp.h>
ekasinambela 2:1aab63839dba 4
ekasinambela 0:da915495c7fc 5 Serial pc(USBTX, USBRX);
ekasinambela 0:da915495c7fc 6 DigitalOut myled1(LED1), myled2(LED2);
ekasinambela 3:5baf5ad00c1c 7 AnalogIn pin_1(p16), pin_2(p15), pin_3(p17) ;
ekasinambela 2:1aab63839dba 8 //LinearTemp mysensor(p15, 0.0050354, -273.15);
ekasinambela 2:1aab63839dba 9
ekasinambela 5:d2b58a5771d7 10 char program_name[128] = "G3-Waterplay Project";
mariosimaremare 1:6476db5e52e8 11
ekasinambela 4:49b028845be4 12 void salinityMeasurement();
ekasinambela 4:49b028845be4 13 void temperatureMeasurement();
ekasinambela 4:49b028845be4 14
mariosimaremare 1:6476db5e52e8 15 int main()
mariosimaremare 1:6476db5e52e8 16 {
ekasinambela 2:1aab63839dba 17 while(1){
ekasinambela 3:5baf5ad00c1c 18 wait(5);
ekasinambela 4:49b028845be4 19 salinityMeasurement();
ekasinambela 4:49b028845be4 20 temperatureMeasurement();
ekasinambela 0:da915495c7fc 21 }
ekasinambela 0:da915495c7fc 22 }
ekasinambela 4:49b028845be4 23
ekasinambela 4:49b028845be4 24 //salinity function
ekasinambela 4:49b028845be4 25 void salinityMeasurement(){
ekasinambela 4:49b028845be4 26 float f = pin_1.read();
ekasinambela 4:49b028845be4 27
ekasinambela 4:49b028845be4 28 float vin = f * 3.3;
ekasinambela 4:49b028845be4 29 float divider = (float)5/ (float)3;
ekasinambela 4:49b028845be4 30 float vout = vin * divider;
ekasinambela 4:49b028845be4 31
ekasinambela 4:49b028845be4 32 //measure the salinity
ekasinambela 4:49b028845be4 33 float salt = 16.3 * vout;
ekasinambela 4:49b028845be4 34 pc.printf("f: %f, vin: %f, vin2: %f, salt: %f \n\r", f, vin, vout, salt);
ekasinambela 4:49b028845be4 35 }
ekasinambela 4:49b028845be4 36
ekasinambela 4:49b028845be4 37 //temperature function
ekasinambela 4:49b028845be4 38 void temperatureMeasurement(){
ekasinambela 4:49b028845be4 39 //measure the temperature
ekasinambela 4:49b028845be4 40 double f2 = pin_2.read();
ekasinambela 4:49b028845be4 41 double vin = f2 * 4.85;
ekasinambela 4:49b028845be4 42 double divider = (double)5/ (double)3;
ekasinambela 4:49b028845be4 43 double vout = vin * divider;
ekasinambela 4:49b028845be4 44
ekasinambela 4:49b028845be4 45 double RT = (vout * (double)15000) / (4.85 - vout);
ekasinambela 4:49b028845be4 46 double K0 = 0.00102119;
ekasinambela 4:49b028845be4 47 double K1 = 0.000222468 * (log(RT));
ekasinambela 4:49b028845be4 48 double K2 = double (1.33342 * pow (10.0, -7.0)) * pow ((double)log(RT), 3.0);
ekasinambela 4:49b028845be4 49 double TKelvin = 1.0 / (K0 + K1 + K2);
ekasinambela 4:49b028845be4 50 double Celcius = (TKelvin - 273.15)+5.0;
ekasinambela 4:49b028845be4 51
ekasinambela 4:49b028845be4 52 pc.printf("K0: %f, K1: %f, K2: %f \n\r", K0, K1, K2);
ekasinambela 4:49b028845be4 53 pc.printf("vin: %f, vout: %f, temperature: %f \n\r", vin, vout, Celcius);
ekasinambela 4:49b028845be4 54 pc.printf("f2: %f, vin: %f, vout: %f, RT: %f, TKelvin: %f, temperature: %f \n\r",f2, vin, vout, RT, TKelvin, Celcius);
ekasinambela 4:49b028845be4 55 }
ekasinambela 4:49b028845be4 56
ekasinambela 4:49b028845be4 57