Yuji Notsu / Mbed 2 deprecated HSM20G_test

Temperature and Humidity measure by HSM20G, and display the information of Temp / RH in TextLCD (16 x 2). The circuit between mbed and HSM20G is recommended circuit. ( http://sites.google.com/site/measuringstuff/more-sensor-examples#TOC-HSM-20G-Humidity-and-Temperature-Mi)

Dependencies:   mbed

main.cpp@0:a2b87ea0684b, 2010-09-28 (annotated)

Committer:
y_notsu
Date:
Tue Sep 28 15:24:36 2010 +0000
Revision:
0:a2b87ea0684b

        

        
Who changed what in which revision?

        

            
                
UserRevisionLine numberNew contents of line

            
            


y_notsu

0:a2b87ea0684b


     1

#include "mbed.h"





y_notsu

0:a2b87ea0684b


     2

#include "TextLCD.h"





y_notsu

0:a2b87ea0684b


     3







y_notsu

0:a2b87ea0684b


     4

int nsum=10;





y_notsu

0:a2b87ea0684b


     5







y_notsu

0:a2b87ea0684b


     6

AnalogIn humidity(p20);





y_notsu

0:a2b87ea0684b


     7

AnalogIn temp(p19);





y_notsu

0:a2b87ea0684b


     8







y_notsu

0:a2b87ea0684b


     9

float sensorValue2 = 0.0;





y_notsu

0:a2b87ea0684b


    10

float sensorValue3 = 0.0; 





y_notsu

0:a2b87ea0684b


    11

 





y_notsu

0:a2b87ea0684b


    12

TextLCD lcd(p24,p25,p26,p27,p28,p29); //rs,e,d0-d3 





y_notsu

0:a2b87ea0684b


    13







y_notsu

0:a2b87ea0684b


    14







y_notsu

0:a2b87ea0684b


    15

int main() {





y_notsu

0:a2b87ea0684b


    16

    while (1){





y_notsu

0:a2b87ea0684b


    17

    for (int i=0;i<nsum;i++)





y_notsu

0:a2b87ea0684b


    18

    {    





y_notsu

0:a2b87ea0684b


    19

     // lcd.cls();





y_notsu

0:a2b87ea0684b


    20

      sensorValue2 += humidity.read();   





y_notsu

0:a2b87ea0684b


    21

     // lcd.locate(0,0);





y_notsu

0:a2b87ea0684b


    22

     // lcd.printf("p20=%5.3f",sensorValue2); 





y_notsu

0:a2b87ea0684b


    23

      sensorValue3 += temp.read();





y_notsu

0:a2b87ea0684b


    24

     // lcd.locate(0,1);





y_notsu

0:a2b87ea0684b


    25

     // lcd.printf("p19=%5.3f",sensorValue3);





y_notsu

0:a2b87ea0684b


    26

     // wait(2.0); 





y_notsu

0:a2b87ea0684b


    27

    }    





y_notsu

0:a2b87ea0684b


    28

    float sensorValue2Avg= sensorValue2/(float)nsum; 





y_notsu

0:a2b87ea0684b


    29

    float RH= 30.855*sensorValue2Avg*3.3-11.504;    





y_notsu

0:a2b87ea0684b


    30

    





y_notsu

0:a2b87ea0684b


    31

    float  sensorValue3Avg= sensorValue3/(float)nsum;





y_notsu

0:a2b87ea0684b


    32

     float Vt=(float) sensorValue3Avg*3.3;  





y_notsu

0:a2b87ea0684b


    33

     float R=(5.0-Vt)*10.0/Vt; 





y_notsu

0:a2b87ea0684b


    34

     float TinC=0.0037*R*R - 0.9876*R + 65.573;





y_notsu

0:a2b87ea0684b


    35

     





y_notsu

0:a2b87ea0684b


    36

     lcd.cls();





y_notsu

0:a2b87ea0684b


    37

     lcd.locate(0,0);





y_notsu

0:a2b87ea0684b


    38

     lcd.printf("RH  =%3.1f[per]",RH);





y_notsu

0:a2b87ea0684b


    39

     lcd.locate(0,1);





y_notsu

0:a2b87ea0684b


    40

     lcd.printf("Temp=%3.1f[deg]",TinC);





y_notsu

0:a2b87ea0684b


    41

     





y_notsu

0:a2b87ea0684b


    42

     wait(2.0);





y_notsu

0:a2b87ea0684b


    43

     





y_notsu

0:a2b87ea0684b


    44

      sensorValue2 = 0.0;





y_notsu

0:a2b87ea0684b


    45

      sensorValue3 = 0.0; 





y_notsu

0:a2b87ea0684b


    46

    }





y_notsu

0:a2b87ea0684b


    47

}