91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
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/*
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* Copyright (c) 2011, 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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#include "contiki.h"
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#include "lib/sensors.h"
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#include "dev/sht11-sensor.h"
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#include "slip-radio.h"
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#include "cmd.h"
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#include <stdio.h>
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/*---------------------------------------------------------------------------*/
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static void
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init(void)
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{
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}
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/*---------------------------------------------------------------------------*/
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static int
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write_percent_float(char *data, int maxlen, int temp)
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{
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int t;
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t = temp % 100;
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if(t < 0) {
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t = -t;
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}
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return snprintf(data, maxlen, "%d.%02d", temp / 100, t);
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}
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/*---------------------------------------------------------------------------*/
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static void
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send(void)
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{
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#define MAX_SIZE 40
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char data[MAX_SIZE];
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int temperature;
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int ms;
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long hum;
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int pos = 0;
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/* SENSORS_ACTIVATE(light_sensor); */
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SENSORS_ACTIVATE(sht11_sensor);
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pos += snprintf(data, MAX_SIZE, "!D");
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/* int light1 = light_sensor.value(LIGHT_SENSOR_PHOTOSYNTHETIC); */
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/* int light2 = light_sensor.value(LIGHT_SENSOR_TOTAL_SOLAR); */
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temperature = -3970 + sht11_sensor.value(SHT11_SENSOR_TEMP);
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ms = sht11_sensor.value(SHT11_SENSOR_HUMIDITY);
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/* this is in * 10000 */
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/* -2.0468 + 0.0367 * ms + -1.5955e-6 * ms * ms ...too small value... */
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hum = (-20468L + 367L * ms) / 100L;
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/* SENSORS_DEACTIVATE(light_sensor); */
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SENSORS_DEACTIVATE(sht11_sensor);
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pos += snprintf(&data[pos], MAX_SIZE - pos, "temp=");
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pos += write_percent_float(&data[pos], MAX_SIZE - pos, temperature);
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pos += snprintf(&data[pos], MAX_SIZE - pos, ";hum=");
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pos += write_percent_float(&data[pos], MAX_SIZE - pos, hum);
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cmd_send((uint8_t *)data, pos);
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}
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/* ---------------------------------------------------------------------- */
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const struct slip_radio_sensors slip_radio_sky_sensors = {
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init, send
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};
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/* ---------------------------------------------------------------------- */
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