int main(int argc, char **argv) {
int onetime_mode = 0;
if (argc >= 2) {
if (strcmp(argv[1], "-1") == 0) {
onetime_mode = 1;
}
}
if(dht11_init() == -1) {
exit(1);
}
// wait for the the setup of DHT11
delay(10);
if (onetime_mode) {
dht11_read_val();
} else {
int i;
for (i = 0; i < RETRY_MAX; i++) {
dht11_read_val();
delay(1000);
}
}
return 0;
}
int main(int argc, char *argv[])
{
int last_pir_val, last_ldr_diff;
printf("Interfacing Sensors With Raspberry Pi\n");
if(wiringPiSetup()==-1)
exit(1);
fname[0] = '\0';
if (argc > 1) {
fd = fopen (argv[1], "a");
if (fd) {
strncpy (fname, argv[1], 29);
fclose (fd);
}
}
night_light_off ();
launch_lm393_thread ();
while(1)
{
// read all sensors */
dht11_read_val();
last_pir_val = pir_read_val();
last_ldr_diff = ldr_read_val();
night_light_oper (last_ldr_diff, last_pir_val);
}
return 0;
}
int main(void)
{
printf("Interfacing Temperature and Humidity Sensor (DHT11) With Raspberry Pi\n");
// ***
// *** Ensure we have wiringPi
// ***
if (wiringPiSetup() == -1)
{
exit(1);
}
while (1)
{
// ***
// *** Read the sensor
// ***
dht11_read_val();
// ***
// *** Delay between readings
// ***
delay(DELAY_TIME);
}
return 0;
}
static void kaa_demo_add_log_record(void *context)
{
static size_t log_record_counter = 0;
float humidity = 0.0;
float temperature = 0.0;
if (dht11_read_val(DHT11_PIN, &humidity, &temperature) != 0) {
printf("Failed to read data from sensor\n");
return;
}
++log_record_counter;
kaa_user_log_record_t *log_record = kaa_logging_sensor_data_create();
if (!log_record) {
printf("Failed to create log record, error code %d\n", KAA_ERR_NOMEM);
return;
}
log_record->sensor_id = kaa_string_copy_create("Sensor 1");
log_record->region = kaa_string_copy_create("Region 1");
log_record->model = kaa_string_copy_create("DHT11");
log_record->value = temperature;
printf("Going to add %zuth log record: { id: '%s', region: '%s', model: '%s', val: %g }\n"
, log_record_counter, log_record->sensor_id->data, log_record->region->data, log_record->model->data, log_record->value);
kaa_error_t error_code = kaa_logging_add_record(kaa_client_get_context((kaa_client_t *)context)->log_collector, log_record, NULL);
if (error_code) {
printf("Failed to add log record, error code %d\n", error_code);
}
log_record->destroy(log_record);
}
int main(void)
{
if(wiringPiSetup()==-1)
exit(1);
while(1)
{
dht11_read_val();
delay(3000);
}
return 0;
}
int main(void)
{
int ihumidity = -1;
int itemp = -1;
printf("Interfacing Temperature and Humidity Sensor (DHT11) With Raspberry Pi\n");
if(wiringPiSetup()==-1)
exit(1);
while(1)
{
dht11_read_val();
delay(3000);
}
return 0;
}
int main(void){
// int attempts=ATTEMPTS;
if(wiringPiSetup()==-1)
exit(1);
// while(attempts){ //you have 5 times to retry
int success = dht11_read_val(); //get result including printing out
// if (success) { //if get result, quit program; if not, retry 5 times then quit
// break;
// }
// attempts--;
// delay(2500);
// }
return success;
}
int main(void)
{
int attempts=ATTEMPTS;
if(wiringPiSetup()==-1)
exit(1);
while(attempts)
{
int success = dht11_read_val();
if (success) {
break;
}
attempts--;
delay(500);
}
return 0;
}
int main(void)
{
int a = 0;
int attempts=ATTEMPTS;
if(wiringPiSetup()==-1)
exit(1);
for(a=0; a<5; )
{
int success = dht11_read_val();
if (success) {
a++;
delay(5000);
}
//attempts--;
}
return 0;
}
void pm_read()
{
int uart0_filestream = -1;
uart0_filestream = open("/dev/ttyAMA0", O_RDWR | O_NOCTTY | O_NDELAY); //Open in non blocking read/write mode
if (uart0_filestream == -1)
{
printf("Error - Unable to open UART. Ensure it is not in use by another application\n");
}
struct termios options;
tcgetattr(uart0_filestream, &options);
options.c_cflag = B9600 | CS8 | CLOCAL | CREAD; //<Set baud rate
options.c_iflag = IGNPAR;
options.c_oflag = 0;
options.c_lflag = 0;
tcflush(uart0_filestream, TCIFLUSH);
tcsetattr(uart0_filestream, TCSANOW, &options);
int counter=0;
for(;;)
{
sleep(1);
if (uart0_filestream != -1)
{
uint8_t rx_buffer[32];
int rx_length = read(uart0_filestream, (uint8_t *)rx_buffer, 32);
if (rx_length < 0)
{
}
else if (rx_length == 0)
{
//No data waiting
}
else
{
//Bytes received
//printf("c=%d\n",c);
//rx_buffer[rx_length] = '\0';
uint8_t test;
pm1_0 = (rx_buffer[4]<<8)+rx_buffer[5];
pm2_5 = (rx_buffer[6]<<8)+rx_buffer[7];
pm10 = (rx_buffer[8]<<8)+rx_buffer[9];
test = rx_buffer[0];
if(test==66)
{
printf("PM1.0: %d\n",pm1_0);
printf("PM2.5: %d\n",pm2_5);
printf("PM10: %d\n",pm10);
dht11_read_val();
printf("*******************************\n");
}
}
}
}
close(uart0_filestream);
}