nem PIC ile

[sky76]

Sayın arkadaşlar nem değerini algılama ve röleyi aktif etme devresi hakkında bilgi verebilirseniz sevinirim. şimdiden teşekkürler.

[ayhani]

:oops:

[mucitotomaston]

simdi sen nem degeri algılama  derken istenilen nem degerinde  on/off yapmak istiyorsun   sana örnek bir program vereyim  bu program sadece nem ile sıcaklıgı lcd gösteriyo gerisini sen yaparsın  kolay nede olsa  

powered  by MUCİT

#include <16F877.h>
#fuses HS,NOWDT,PUT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#include<lcd.c>
#include<sht11.c>

void main()
{
float restemp, truehumid;
lcd_init();
sht_init();

while(1)
{
 sht_rd (restemp, truehumid);
 lcd_gotoxy(1,1);
 printf(lcd_putc, "ORT.SIC: %3.1f %cC   ", restemp, 223); //%işaretindem sonra kücük c  santigırat simgesidir"o"yane
 printf(lcd_putc, "\nORT.NEM: %3.1f %%   ", truehumid); //%işaretinden sonra emekki degişkenin arkasına birşeyler yazdırabiliyoruz
 delay_ms(500);        //delay 500 ms between reading to prevent self heating of sensor
}
}




///////////////////////////////////////////////////////////////////////////////
//                                                                           //
// Driver file for SHT75 Temperature & Humidity Sensor                       //
//                                                                           //
// ***** To initialise SHT75 sensor upon power up *****                      //
//                                                                           //
// Function : sht_init()                                                     //
// Return   : none                                                           //
//                                                                           //
//                                                                           //
// ***** To measure and caluculate SHT75 temp & real RH *****                //
//                                                                           //
// Function : sht_rd (temp, truehumid)                                       //
// Return   : temperature & true humidity in float values                    //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#define sht_data_pin   PIN_D3
#define sht_clk_pin    PIN_C4


//***** Function to alert SHT75 *****

void comstart (void)
{
output_float(sht_data_pin);  //data high
output_bit(sht_clk_pin, 0);  //clk low
delay_us(1);
output_bit(sht_clk_pin, 1);  //clk high
delay_us(1);
output_bit(sht_data_pin, 0); //data low
delay_us(1);
output_bit(sht_clk_pin, 0);  //clk low
delay_us(2);
output_bit(sht_clk_pin, 1);  //clk high
delay_us(1);
output_float(sht_data_pin);  //data high
delay_us(1);
output_bit(sht_clk_pin, 0);  //clk low
}


//***** Function to write data to SHT75 *****

int1 comwrite (int8 iobyte)
{
int8 i, mask = 0x80;
int1 ack;

//Shift out command
delay_us(4);
for(i=0; i<8; i++)
 {
  output_bit(sht_clk_pin, 0);                          //clk low
  if((iobyte & mask) > 0) output_float(sht_data_pin);  //data high if MSB high
  else output_bit(sht_data_pin, 0);                    //data low if MSB low
  delay_us(1);
  output_bit(sht_clk_pin, 1);                          //clk high
  delay_us(1);
  mask = mask >> 1;                                    //shift to next bit
 }

//Shift in ack
output_bit(sht_clk_pin, 0);  //clk low
delay_us(1);
ack = input(sht_data_pin);   //get ack bit
output_bit(sht_clk_pin, 1);  //clk high
delay_us(1);
output_bit(sht_clk_pin, 0);  //clk low
return(ack);
}


//***** Function to read data from SHT75 *****

int16 comread (void)
{
int8 i;
int16 iobyte = 0;
const int16 mask0 = 0x0000;
const int16 mask1 = 0x0001;

//shift in MSB data
for(i=0; i<8; i++)
 {
  iobyte = iobyte << 1;
  output_bit(sht_clk_pin, 1);                //clk high
  delay_us(1);
  if (input(sht_data_pin)) iobyte |= mask1;  //shift in data bit
  else iobyte |= mask0;
  output_bit(sht_clk_pin, 0);                //clk low
  delay_us(1);
 }

//send ack 0 bit
output_bit(sht_data_pin, 0); //data low
delay_us(1);
output_bit(sht_clk_pin, 1);  //clk high
delay_us(2);
output_bit(sht_clk_pin, 0);  //clk low
delay_us(1);
output_float(sht_data_pin);  //data high

//shift in LSB data
for(i=0; i<8; i++)
 {
  iobyte = iobyte << 1;
  output_bit(sht_clk_pin, 1);                //clk high
  delay_us(1);
  if (input(sht_data_pin)) iobyte |= mask1;  //shift in data bit
  else iobyte |= mask0;
  output_bit(sht_clk_pin, 0);                //clk low
  delay_us(1);
 }

//send ack 1 bit
output_float(sht_data_pin);  //data high
delay_us(1);
output_bit(sht_clk_pin, 1);  //clk high
delay_us(2);
output_bit(sht_clk_pin, 0);  //clk low

return(iobyte);
}


//***** Function to wait for SHT75 reading *****

void comwait (void)
{
int16 sht_delay;

output_float(sht_data_pin);                     //data high
output_bit(sht_clk_pin, 0);                     //clk low
delay_us(1);
for(sht_delay=0; sht_delay<30000; sht_delay++)  // wait for max 300ms
 {
  if (!input(sht_data_pin)) break;              //if sht_data_pin low, SHT75 ready
  delay_us(10);
 }
}


//***** Function to reset SHT75 communication *****

void comreset (void)
{
int8 i;

output_float(sht_data_pin);    //data high
output_bit(sht_clk_pin, 0);    //clk low
delay_us(2);
for(i=0; i<9; i++)
 {
  output_bit(sht_clk_pin, 1);  //toggle clk 9 times
  delay_us(2);
  output_bit(sht_clk_pin, 0);
  delay_us(2);
}
comstart();
}


//***** Function to soft reset SHT75 *****

void sht_soft_reset (void)
{
comreset();           //SHT75 communication reset
comwrite(0x1e);       //send SHT75 reset command
delay_ms(15);         //pause 15 ms
}


//***** Function to measure SHT75 temperature *****

int16 measuretemp (void)
{
int1 ack;
int16 iobyte;

comstart();             //alert SHT75
ack = comwrite(0x03);   //send measure temp command and read ack status
if(ack == 1) return;
comwait();              //wait for SHT75 measurement to complete
iobyte = comread();     //read SHT75 temp data
return(iobyte);
}


//***** Function to measure SHT75 RH *****

int16 measurehumid (void)
{
int1 ack;
int16 iobyte;

comstart();            //alert SHT75
ack = comwrite(0x05);  //send measure RH command and read ack status
if(ack == 1) return;
comwait();             //wait for SHT75 measurement to complete
iobyte = comread();    //read SHT75 temp data
return(iobyte);
}


//***** Function to calculate SHT75 temp & RH *****

void calculate_data (int16 temp, int16 humid, float & tc, float & rhlin, float & rhtrue)
{
float truehumid1, rh;

//calculate temperature reading
tc = ((float) temp * 0.01) - 40.0;

//calculate Real RH reading
rh = (float) humid;

rhlin = (rh * 0.0405) - (rh * rh * 0.0000028) - 4.0;

//calculate True RH reading
rhtrue = ((tc - 25.0) * (0.01 + (0.00008 * rh))) + rhlin;
}


//***** Function to measure & calculate SHT75 temp & RH *****

void sht_rd (float & temp, float & truehumid)
{
int16 restemp, reshumid;
float realhumid;
restemp = 0; truehumid = 0;

restemp = measuretemp();    //measure temp
reshumid = measurehumid();  //measure RH
calculate_data (restemp, reshumid, temp, realhumid, truehumid);  //calculate temp & RH
}


//***** Function to initialise SHT75 on power-up *****

void sht_init (void)
{
comreset();    //reset SHT75
delay_ms(20);  //delay for power-up
}

[elektro2009]

Sayın arkadaşlar yardımlar için çok teşekkürler.
Toprak için nem devresi var mı?
Ben bu adreste buldum işe yararmı?
http://www.redcircuits.com/Page18.htm
Saygılar.