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186 lines
5.8 KiB
C
186 lines
5.8 KiB
C
/*
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* Copyright (c) 2014, Daniele Alessandrelli.
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* Copyright (c) 2015, Nordic Semiconductor
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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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* \addtogroup nrf52dk-examples Demo projects for nRF52 DK
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* @{
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*
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* \defgroup nrf52dk-coap-demo CoAP demo for nRF52 DK
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* @{
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*
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* \file
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* Erbium (Er) CoAP observe client example.
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* \author
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* Daniele Alessandrelli <daniele.alessandrelli@gmail.com>
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* \author
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* Wojciech Bober <wojciech.bober@nordicsemi.no>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "contiki.h"
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#include "contiki-net.h"
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#include "er-coap-engine.h"
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#include "dev/button-sensor.h"
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#include "dev/leds.h"
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#define DEBUG 0
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#if DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*----------------------------------------------------------------------------*/
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#define REMOTE_PORT UIP_HTONS(COAP_DEFAULT_PORT)
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#define OBS_RESOURCE_URI "lights/led3"
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#define SUBS_LED LEDS_4
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#define OBS_LED LEDS_3
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/*----------------------------------------------------------------------------*/
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static uip_ipaddr_t server_ipaddr[1]; /* holds the server ip address */
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static coap_observee_t *obs;
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static struct ctimer ct;
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/*----------------------------------------------------------------------------*/
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PROCESS(er_example_observe_client, "nRF52 DK Coap Observer Client");
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AUTOSTART_PROCESSES(&er_example_observe_client);
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/*----------------------------------------------------------------------------*/
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static void
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observe_led_off(void *d)
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{
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leds_off(SUBS_LED);
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}
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/*----------------------------------------------------------------------------*/
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/*
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* Handle the response to the observe request and the following notifications
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*/
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static void
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notification_callback(coap_observee_t *obs, void *notification,
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coap_notification_flag_t flag)
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{
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int len = 0;
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const uint8_t *payload = NULL;
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PRINTF("Notification handler\n");
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PRINTF("Observee URI: %s\n", obs->url);
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if (notification) {
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len = coap_get_payload(notification, &payload);
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}
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(void)len;
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switch (flag) {
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case NOTIFICATION_OK:
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PRINTF("NOTIFICATION OK: %*s\n", len, (char *)payload);
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if (*payload == '1') {
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leds_on(OBS_LED);
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} else {
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leds_off(OBS_LED);
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}
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break;
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case OBSERVE_OK: /* server accepeted observation request */
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PRINTF("OBSERVE_OK: %*s\n", len, (char *)payload);
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if (*payload == '1') {
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leds_on(OBS_LED);
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} else {
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leds_off(OBS_LED);
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}
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leds_on(SUBS_LED);
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ctimer_set(&ct, CLOCK_SECOND, observe_led_off, NULL);
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break;
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case OBSERVE_NOT_SUPPORTED:
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PRINTF("OBSERVE_NOT_SUPPORTED: %*s\n", len, (char *)payload);
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obs = NULL;
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break;
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case ERROR_RESPONSE_CODE:
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PRINTF("ERROR_RESPONSE_CODE: %*s\n", len, (char *)payload);
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obs = NULL;
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break;
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case NO_REPLY_FROM_SERVER:
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PRINTF("NO_REPLY_FROM_SERVER: "
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"removing observe registration with token %x%x\n",
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obs->token[0], obs->token[1]);
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obs = NULL;
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break;
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}
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}
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/*----------------------------------------------------------------------------*/
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/*
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* The main (proto-)thread. It starts/stops the observation of the remote
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* resource every time the timer elapses or the button (if available) is
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* pressed
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*/
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PROCESS_THREAD(er_example_observe_client, ev, data)
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{
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PROCESS_BEGIN();
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uiplib_ipaddrconv(SERVER_IPV6_ADDR, server_ipaddr);
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/* receives all CoAP messages */
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coap_init_engine();
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#if PLATFORM_HAS_BUTTON
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SENSORS_ACTIVATE(button_1);
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SENSORS_ACTIVATE(button_2);
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#endif
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/* toggle observation every time the timer elapses or the button is pressed */
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while (1) {
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PROCESS_YIELD();
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#if PLATFORM_HAS_BUTTON
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if (ev == sensors_event) {
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if (data == &button_1 && button_1.value(BUTTON_SENSOR_VALUE_STATE) == 0) {
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PRINTF("Starting observation\n");
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obs = coap_obs_request_registration(server_ipaddr, REMOTE_PORT,
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OBS_RESOURCE_URI, notification_callback,
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NULL);
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}
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if (data == &button_2 && button_2.value(BUTTON_SENSOR_VALUE_STATE) == 0) {
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PRINTF("Stopping observation\n");
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coap_obs_remove_observee(obs);
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obs = NULL;
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}
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}
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#endif
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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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