95 lines
3.7 KiB
C
95 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 2015, Zolertia <http://www.zolertia.com>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
*/
|
|
/**
|
|
* \addtogroup zoul-examples
|
|
* @{
|
|
*
|
|
* \defgroup zoul-sht25-test SHT25 temperature and humidity sensor test
|
|
*
|
|
* Demonstrates the use of the SHT25 digital temperature and humidity sensor
|
|
* @{
|
|
*
|
|
* \file
|
|
* A quick program for testing the SHT25 temperature and humidity sensor
|
|
* \author
|
|
* Antonio Lignan <alinan@zolertia.com>
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
#include <stdio.h>
|
|
#include "contiki.h"
|
|
#include "dev/sht25.h"
|
|
/*---------------------------------------------------------------------------*/
|
|
PROCESS(remote_sht25_process, "SHT25 test");
|
|
AUTOSTART_PROCESSES(&remote_sht25_process);
|
|
/*---------------------------------------------------------------------------*/
|
|
static struct etimer et;
|
|
/*---------------------------------------------------------------------------*/
|
|
PROCESS_THREAD(remote_sht25_process, ev, data)
|
|
{
|
|
int16_t temperature, humidity;
|
|
|
|
PROCESS_BEGIN();
|
|
SENSORS_ACTIVATE(sht25);
|
|
|
|
/* Check if the sensor voltage operation is over 2.25V */
|
|
if(sht25.value(SHT25_VOLTAGE_ALARM)) {
|
|
printf("Voltage is lower than recommended for the sensor operation\n");
|
|
PROCESS_EXIT();
|
|
}
|
|
|
|
/* Configure the sensor for maximum resolution (14-bit temperature, 12-bit
|
|
* relative humidity), this will require up to 85ms for the temperature
|
|
* integration, and 29ms for the relative humidity (this is the default
|
|
* setting at power on). To achieve a faster integration time at the cost
|
|
* of a lower resolution, change the value below accordingly, see sht25.h.
|
|
*/
|
|
sht25.configure(SHT25_RESOLUTION, SHT2X_RES_14T_12RH);
|
|
|
|
/* Let it spin and read sensor data */
|
|
|
|
while(1) {
|
|
etimer_set(&et, CLOCK_SECOND);
|
|
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
|
|
temperature = sht25.value(SHT25_VAL_TEMP);
|
|
printf("Temperature %02d.%02d ºC, ", temperature / 100, temperature % 100);
|
|
humidity = sht25.value(SHT25_VAL_HUM);
|
|
printf("Humidity %02d.%02d RH\n", humidity / 100, humidity % 100);
|
|
}
|
|
PROCESS_END();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* @}
|
|
* @}
|
|
*/
|
|
|