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nerves_dht

0.1.3
0.1.3 retired 0.1.2 retired 0.1.1 0.1.0

Drive of DHT 11 and DHT 22 (temperature and humidity sensor)

Retired package: Deprecated - functionality updated and moved to https://hex.pm/packages/dht
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nerves_dht src _Host_Driver.c
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src/_Host_Driver.c 

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>



#include "erl_comm.c"

#include "erl_interface.h"

#include "ei.h"



typedef unsigned char byte;



int main(int argc, char *argv[]) {



  if (argc != 3) {

    fprintf(stderr, "Usage: %s [GPIO_Pin] [DHT] \n", argv[0]);

    exit(EXIT_FAILURE);

  }



  int pin = atoi(argv[1]);

  int sensor = atoi(argv[2]);



  for(;;){

    sleep(3);



    if (1){



      float humidity = (float)rand()/(float)(RAND_MAX/50);

      float temperature = (float)rand()/(float)(RAND_MAX/30);



      write_success(pin, sensor, humidity, temperature);



    } else {



      write_error(-1);

    }



  }



}