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93 lines
3.0 KiB
C
93 lines
3.0 KiB
C
/*
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* Copyright (c) 2014, OpenMote Technologies, S.L.
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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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*/
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/**
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* \addtogroup openmote-examples
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* @{
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*
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* \defgroup openmote-sht21
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*
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* This example tests the correct functionality of the SHT21 temperature
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* and humidity sensor using the I2C bus.
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*
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* @{
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*
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* \file
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* Testing the SHT21 sensor on the OpenMote-CC2538 platform.
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* \author
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* Pere Tuset <peretuset@openmote.com>
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*/
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#include "contiki.h"
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#include "dev/sht21.h"
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#include "dev/leds.h"
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#include "sys/etimer.h"
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#include <stdio.h>
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PROCESS(test_sht21_process, "SHT21 test");
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AUTOSTART_PROCESSES(&test_sht21_process);
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PROCESS_THREAD(test_sht21_process, ev, data)
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{
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static struct etimer et;
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static unsigned raw;
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static float temperature;
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static float humidity;
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PROCESS_BEGIN();
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sht21_init();
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if (!sht21_is_present()) {
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leds_on(LEDS_ORANGE);
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}
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while(1) {
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etimer_set(&et, CLOCK_SECOND);
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PROCESS_YIELD();
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if (ev == PROCESS_EVENT_TIMER) {
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leds_on(LEDS_YELLOW);
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raw = sht21_read_temperature();
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temperature = sht21_convert_temperature(raw);
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printf("Temperature: %u.%u degrees Celsius\n", (unsigned int) temperature, (unsigned int) (temperature * 100) % 100);
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raw = sht21_read_humidity();
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humidity = sht21_convert_humidity(raw);
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printf("Rel. humidity: %u.%u%%\n", (unsigned int) humidity, (unsigned int) (humidity * 100) % 100);
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leds_off(LEDS_YELLOW );
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}
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}
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PROCESS_END();
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}
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