main.cpp

00001 /*
00002 ECE 4180 Final Project: Rainwater Harvesting System with IoT
00003 
00004 SAMPLE DATA: There's a lot of noise specially in the beginning when water just bounces around the empty tank
00005 reading the sensor at longer intervals of time might help reduce the noise but the data in general looks like 
00006 this with bounds (~empty : ~full) => (~192mm : ~ 34mm) 
00007 
00008 */
00009 
00010 //adding the libraries
00011     #include "mbed.h"
00012     #include "ultrasonic.h"
00013     #include "uLCD_4DGL.h"
00014     #include "Servo.h"
00015 
00016 
00017 //defining the pinouts
00018     uLCD_4DGL uLCD(p28,p27,p30); // serial tx, serial rx, reset pin;
00019     //ultrasonic mu(p6, p7, .1, 1, &dist); 
00020     //I2C rangefinder(p9, p10); //sda, sc1 
00021     Serial pc(USBTX, USBRX); //tx, rx 
00022     //Servo myservo(p21);
00023 
00024 //defining arbitrary variables
00025 int height;
00026 //bool LidClosed = false;
00027 //bool empty;
00028 //float p = 0;
00029 
00030 
00031 //sensor function for height
00032 void dist(int distance)
00033  { 
00034         height = distance;
00035         //height = mu.getCurrentDistance(void);   
00036         printf("DISTANC %d mm\r\n", distance);
00037         
00038  }
00039  
00040 ultrasonic mu(p6, p7, .5, 1, &dist); 
00041  
00042  //pass on the height return volume
00043 int Volume(int h)
00044  {
00045    double pi = 3.14;
00046    double radius = 6.5;
00047    return(pi*radius*radius*h); 
00048  }
00049  
00050  
00051  
00052  //Displays the water level and volume on LCD
00053  void Display()
00054  {
00055     int V = height/3; 
00056     volatile int level = 27 + V;
00057     uLCD.baudrate(BAUD_3000000);
00058     uLCD.background_color(BLACK);
00059     uLCD.cls(); //replace with a black retangle instead oc clear screen
00060     uLCD.locate(3,12);
00061     uLCD.printf("VOLUME= %d",Volume(height));
00062     //uLCD.printf("Volume =  ");    
00063     //void rectangle(int, int, int, int, int);
00064     //uLCD.locate(1,1);
00065     uLCD.rectangle(50, 25, 102, 92, 0x0FFFFF);
00066     // dynamic rectangle size -> second argument of rectangle should be based on the sonar reading level.
00067     uLCD.filled_rectangle(52, level, 100, 90, 0x00FF00); // fill rectangle based on current volume levels
00068     wait(0.5);             
00069  }
00070 
00071 
00072 
00073 //void tankLid()
00074 //{
00075 // //check is tank is empty and lid is closed then opens 
00076 //     if(( empty == 1) && (LidClosed == true))
00077 //      {  
00078 //        for(p=0; p<=10; p++) 
00079 //        {
00080 //         myservo = p/10.0;
00081 //        
00082 //        }
00083 //        LidClosed = false;
00084 //        
00085 //      }
00086 //      
00087 //     //checks if tank is full and lid is open then closes  
00088 //     else if((empty == 0) &&(LidClosed == false))  
00089 //      { 
00090 //        for(p=10; p>=0; p--) 
00091 //         {
00092 //           myservo = p/10.0;
00093 //           
00094 //         }
00095 //         LidClosed = true;
00096 //      }
00097 // }    
00098 
00099    int main() 
00100    {
00101      mu.startUpdates();
00102      
00103      while (1) 
00104      {
00105         
00106         //tank empty == 1 open lid
00107         mu.checkDistance();   //checks height value fro sonar
00108         //height = mu.getCurrentDistance();
00109          wait(0.5);
00110         Display(); //computes volume and display volume level
00111          wait(0.5);
00112         //stream current level value to SDcard repeat  
00113          //pc.printf("DISTANCE %d mm\r\n", height);//
00114          //pc.printf("TEST\n");
00115          
00116      } 
00117      
00118   }
00119