/* * Copyright (c) 2010, Swedish Institute of Computer Science. * 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. * */ /** * \file * Light and temperatur sensor web demo * \author * Niclas Finne * Joakim Eriksson * Joel Hoglund */ #include "contiki.h" #include "httpd-simple.h" #include "dev/sht11/sht11-sensor.h" #include "dev/light-sensor.h" #include "dev/leds.h" #include PROCESS(web_sense_process, "Sense Web Demo"); PROCESS(webserver_nogui_process, "Web server"); PROCESS_THREAD(webserver_nogui_process, ev, data) { PROCESS_BEGIN(); httpd_init(); while(1) { PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event); httpd_appcall(data); } PROCESS_END(); } AUTOSTART_PROCESSES(&web_sense_process,&webserver_nogui_process); #define HISTORY 16 static int temperature[HISTORY]; static int light1[HISTORY]; static int sensors_pos; /*---------------------------------------------------------------------------*/ static int get_light(void) { return 10 * light_sensor.value(LIGHT_SENSOR_PHOTOSYNTHETIC) / 7; } /*---------------------------------------------------------------------------*/ static int get_temp(void) { return ((sht11_sensor.value(SHT11_SENSOR_TEMP) / 10) - 396) / 10; } /*---------------------------------------------------------------------------*/ static const char *TOP = "Contiki Web Sense\n"; static const char *BOTTOM = "\n"; /*---------------------------------------------------------------------------*/ /* Only one single request at time */ static char buf[256]; static int blen; #define ADD(...) do { \ blen += snprintf(&buf[blen], sizeof(buf) - blen, __VA_ARGS__); \ } while(0) static void generate_chart(const char *title, const char *unit, int min, int max, int *values) { int i; blen = 0; ADD("

%s

\n" "

0 ? "," : "", values[(sensors_pos + i) % HISTORY]); } ADD("\">"); } static PT_THREAD(send_values(struct httpd_state *s)) { PSOCK_BEGIN(&s->sout); SEND_STRING(&s->sout, TOP); if(strncmp(s->filename, "/index", 6) == 0 || s->filename[1] == '\0') { /* Default page: show latest sensor values as text (does not require Internet connection to Google for charts). */ blen = 0; ADD("

Current readings

\n" "Light: %u
" "Temperature: %u° C", get_light(), get_temp()); SEND_STRING(&s->sout, buf); } else if(s->filename[1] == '0') { /* Turn off leds */ leds_off(LEDS_ALL); SEND_STRING(&s->sout, "Turned off leds!"); } else if(s->filename[1] == '1') { /* Turn on leds */ leds_on(LEDS_ALL); SEND_STRING(&s->sout, "Turned on leds!"); } else { if(s->filename[1] != 't') { generate_chart("Light", "Light", 0, 500, light1); SEND_STRING(&s->sout, buf); } if(s->filename[1] != 'l') { generate_chart("Temperature", "Celsius", 15, 50, temperature); SEND_STRING(&s->sout, buf); } } SEND_STRING(&s->sout, BOTTOM); PSOCK_END(&s->sout); } /*---------------------------------------------------------------------------*/ httpd_simple_script_t httpd_simple_get_script(const char *name) { return send_values; } /*---------------------------------------------------------------------------*/ PROCESS_THREAD(web_sense_process, ev, data) { static struct etimer timer; PROCESS_BEGIN(); sensors_pos = 0; etimer_set(&timer, CLOCK_SECOND * 2); SENSORS_ACTIVATE(light_sensor); SENSORS_ACTIVATE(sht11_sensor); while(1) { PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&timer)); etimer_reset(&timer); light1[sensors_pos] = get_light();; temperature[sensors_pos] = get_temp(); sensors_pos = (sensors_pos + 1) % HISTORY; } PROCESS_END(); } /*---------------------------------------------------------------------------*/