70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/*
|
|
* rht03.c:
|
|
* Driver for the MaxDetect series sensors
|
|
*
|
|
* Copyright (c) 2012-2013 Gordon Henderson. <projects@drogon.net>
|
|
***********************************************************************
|
|
* This file is part of wiringPi:
|
|
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
|
*
|
|
* wiringPi is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* wiringPi is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
|
***********************************************************************
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <wiringPi.h>
|
|
#include <maxdetect.h>
|
|
|
|
#define RHT03_PIN 0
|
|
|
|
/*
|
|
***********************************************************************
|
|
* The main program
|
|
***********************************************************************
|
|
*/
|
|
|
|
int main (void)
|
|
{
|
|
int temp, rh ;
|
|
int newTemp, newRh ;
|
|
|
|
temp = rh = newTemp = newRh = 0 ;
|
|
|
|
wiringPiSetup () ;
|
|
piHiPri (55) ;
|
|
|
|
for (;;)
|
|
{
|
|
delay (100) ;
|
|
|
|
if (!readRHT03 (RHT03_PIN, &newTemp, &newRh))
|
|
continue ;
|
|
|
|
if ((temp != newTemp) || (rh != newRh))
|
|
{
|
|
temp = newTemp ;
|
|
rh = newRh ;
|
|
if ((temp & 0x8000) != 0) // Negative
|
|
{
|
|
temp &= 0x7FFF ;
|
|
temp = -temp ;
|
|
}
|
|
printf ("Temp: %5.1f, RH: %5.1f%%\n", temp / 10.0, rh / 10.0) ;
|
|
}
|
|
}
|
|
|
|
return 0 ;
|
|
}
|