int8_t dht_cache(uint32_t systime){
if (((uint32_t)(systime-cache_time)) > DHT_CACHE_TIMEOUT){
if (dht_gettemperaturehumidity(&cached_temperature, &cached_humidity)){
cache_time = systime;
return 1; //обновили кэш
}
return 0; // не удалось получить значения с датчика
}
return 1; //можно брать из кэша
}
float Get_Hum(void)
{
char printbuff[100];
int8_t temperature = 0;
float humidity;
dht_gettemperaturehumidity(&temperature, &humidity);
dtostrf(temperature, 3, 3, printbuff);
dtostrf(humidity, 3, 3, printbuff);
return humidity;
}
int main(void)
{
char printbuff[100];
//init uart
uart_init( UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU) );
//init interrupt
sei();
#if DHT_FLOAT == 0
int8_t temperature = 0;
int8_t humidity = 0;
#elif DHT_FLOAT == 1
float temperature = 0;
float humidity = 0;
#endif
for (;;) {
if(dht_gettemperaturehumidity(&temperature, &humidity) != -1) {
#if DHT_FLOAT == 0
itoa(temperature, printbuff, 10);
#elif DHT_FLOAT == 1
dtostrf(temperature, 3, 3, printbuff);
#endif
uart_puts("temperature: "); uart_puts(printbuff); uart_puts("C");uart_puts("\r\n");
#if DHT_FLOAT == 0
itoa(humidity, printbuff, 10);
#elif DHT_FLOAT == 1
dtostrf(humidity, 3, 3, printbuff);
#endif
uart_puts("humidity: "); uart_puts(printbuff); uart_puts("%RH");uart_puts("\r\n");
} else {
uart_puts("error"); uart_puts("\r\n");
}
uart_puts("\r\n");
_delay_ms(1500);
}
return 0;
}