2007-10-22 13:05:30 +00:00
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/*
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* Copyright (c) 2007, Swedish Institute of Computer Science.
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* All rights reserved.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be 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 INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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2007-10-22 13:07:00 +00:00
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* $Id: test-sht11.c,v 1.2 2007/10/22 13:07:00 nvt-se Exp $
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2007-10-22 13:05:30 +00:00
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*/
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/**
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* \file
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* Testing the SHT11 sensor.
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* \author
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* Nicolas Tsiftes <nvt@sics.se>
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*/
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#include "contiki.h"
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#include "dev/sht11.h"
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#include <stdio.h>
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PROCESS(test_sht11_process, "SHT11 test");
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AUTOSTART_PROCESSES(&test_sht11_process);
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PROCESS_THREAD(test_sht11_process, ev, data)
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{
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static struct etimer et;
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static unsigned rh;
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PROCESS_BEGIN();
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for (etimer_set(&et, CLOCK_SECOND);; etimer_reset(&et)) {
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PROCESS_YIELD();
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printf("Temperature: %u degrees Celsius\n",
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(unsigned) (-39.60 + 0.01 * sht11_temp()));
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rh = sht11_humidity();
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printf("Rel. humidity: %u%%\n",
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(unsigned) (-4 + 0.0405*rh - 2.8e-6*(rh*rh)));
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}
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PROCESS_END();
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}
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