wiringPi_Blueberry/examples/rht03.c
2023-08-11 15:53:17 +08:00

87 lines
2.2 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 7
/*
***********************************************************************
* The main program
***********************************************************************
*/
int main (void)
{
int result, temp, rh ;
int minT, maxT, minRH, maxRH ;
int numGood, numBad ;
wiringPiSetup () ;
piHiPri (55) ;
minT = 1000 ;
maxT = -1000 ;
minRH = 1000 ;
maxRH = -1000 ;
numGood = numBad = 0 ;
for (;;)
{
delay (100) ;
result = readRHT03 (RHT03_PIN, &temp, &rh) ;
if (!result)
{
printf (".") ;
fflush (stdout) ;
++numBad ;
continue ;
}
++numGood ;
if (temp < minT) minT = temp ;
if (temp > maxT) maxT = temp ;
if (rh < minRH) minRH = rh ;
if (rh > maxRH) maxRH = rh ;
printf ("\r%6d, %6d: ", numGood, numBad) ;
printf ("Temp: %5.1f, RH: %5.1f%%", temp / 10.0, rh / 10.0) ;
printf (" Max/Min Temp: %5.1f:%5.1f", maxT / 10.0, minT / 10.0) ;
printf (" Max/Min RH: %5.1f:%5.1f", maxRH / 10.0, minRH / 10.0) ;
printf ("\n") ;
}
return 0 ;
}