94 lines
3.7 KiB
C
94 lines
3.7 KiB
C
/*
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* Copyright (c) 2015, Zolertia <http://www.zolertia.com>
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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 zoul-examples
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* @{
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*
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* \defgroup zoul-sht25-test SHT25 temperature and humidity sensor test
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*
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* Demonstrates the use of the SHT25 digital temperature and humidity sensor
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* @{
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*
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* \file
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* A quick program for testing the SHT25 temperature and humidity sensor
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* \author
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* Antonio Lignan <alinan@zolertia.com>
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*/
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/*---------------------------------------------------------------------------*/
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#include <stdio.h>
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#include "contiki.h"
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#include "dev/sht25.h"
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/*---------------------------------------------------------------------------*/
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PROCESS(remote_sht25_process, "SHT25 test");
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AUTOSTART_PROCESSES(&remote_sht25_process);
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/*---------------------------------------------------------------------------*/
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static struct etimer et;
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(remote_sht25_process, ev, data)
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{
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int16_t temperature, humidity;
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PROCESS_BEGIN();
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SENSORS_ACTIVATE(sht25);
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/* Check if the sensor voltage operation is over 2.25V */
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if(sht25.value(SHT25_VOLTAGE_ALARM)) {
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printf("Voltage is lower than recommended for the sensor operation\n");
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PROCESS_EXIT();
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}
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/* Configure the sensor for maximum resolution (14-bit temperature, 12-bit
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* relative humidity), this will require up to 85ms for the temperature
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* integration, and 29ms for the relative humidity (this is the default
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* setting at power on). To achieve a faster integration time at the cost
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* of a lower resolution, change the value below accordingly, see sht25.h.
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*/
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sht25.configure(SHT25_RESOLUTION, SHT2X_RES_14T_12RH);
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/* Let it spin and read sensor data */
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while(1) {
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etimer_set(&et, CLOCK_SECOND);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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temperature = sht25.value(SHT25_VAL_TEMP);
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printf("Temperature %02d.%02d ºC, ", temperature / 100, temperature % 100);
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humidity = sht25.value(SHT25_VAL_HUM);
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printf("Humidity %02d.%02d RH\n", humidity / 100, humidity % 100);
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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* @}
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*/
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