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client_new.c
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lee chaemin authoredlee chaemin authored
client_new.c 6.38 KiB
//이채민 client_new.c
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <wiringPi.h>
#include <wiringPiSPI.h>
#include <stdint.h>
#define IN 0
#define OUT 1
#define LOW 0
#define HIGH 1
#define POUT 18
#define VALUE_MAX 30
#define MAX_TIME 100
#define DHT 5
#define PIN 20
int data[5] = {0,0,0,0,0};
char temp_msg[10];
int read_dht_data() {
uint8_t laststate = HIGH;
uint8_t counter = 0;
uint8_t j = 0, i;
data[0] = data[1] = data[2] = data[3] = data[4] = 0;
pinMode(DHT, OUTPUT);
digitalWrite(DHT, LOW);
delay(18);
pinMode(DHT, INPUT);
for (i=0; i<MAX_TIME; i++) {
counter = 0;
while(digitalRead(DHT) == laststate)
{
counter++;
delayMicroseconds(1);
if (counter == 255) {
break;
}
}
laststate = digitalRead(DHT);
if (counter == 255)
break;
if ((i>=4) && (i%2==0))
{
data[j/8]<<=1;
if (counter > 16)
data[j/8] |= 1;
j++;
}
}
if ((j>=40) && (data[4] == ((data[0]+ data[1] + data[2] + data[3]) & 0xFF))) {
printf("Humidity = %d.%d %% Temperature = %d.%d C\n", data[0], data[1], data[2], data[3]);