91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
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/****************************************************************************
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* examples/dhtxx/dhtxx_main.c
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*
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* Copyright (C) 2018 Abdelatif GUETTOUCHE. All rights reserved.
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* Author: Abdelatif GUETTOUCHE <abdelatif.guettouche@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <nuttx/sensors/dhtxx.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* dhtxx_main
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****************************************************************************/
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#ifdef BUILD_MODULE
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int main(int argc, FAR char *argv[])
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#else
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int dhtxx_main(int argc, char *argv[])
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#endif
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{
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struct dhtxx_sensor_data_s data;
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int fd;
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int ret;
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int i;
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printf("Dhtxx app is running.\n");
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fd = open("/dev/dht0", O_RDWR);
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for (i = 0; i < 20; i++)
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{
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ret = read(fd, &data, sizeof(struct dhtxx_sensor_data_s));
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if (ret < 0)
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{
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printf("Read error.\n");
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printf("Sensor reported error %d\n", data.status);
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}
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else
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{
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printf("Read successful.\n");
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printf("Humidity = %2.2f %%, temperature = %2.2f C\n",
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data.hum, data.temp);
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}
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sleep(1);
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}
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close(fd);
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return 0;
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}
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