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5e25ca9bf5
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apps/mqtt/Makefile.mqtt
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apps/mqtt/Makefile.mqtt
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mqtt_src = mqtt.c
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1484
apps/mqtt/mqtt.c
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apps/mqtt/mqtt.c
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509
apps/mqtt/mqtt.h
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apps/mqtt/mqtt.h
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/*
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* Copyright (c) 2015, Texas Instruments Incorporated - http://www.ti.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
|
||||
* are met:
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||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
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||||
* 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.
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||||
* 3. Neither the name of the copyright holder nor the names of its
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||||
* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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||||
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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||||
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 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,
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||||
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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||||
* OF THE POSSIBILITY OF SUCH DAMAGE.
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||||
*/
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||||
/*---------------------------------------------------------------------------*/
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/**
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* \addtogroup apps
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* @{
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*
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* \defgroup mqtt-engine An implementation of MQTT v3.1
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* @{
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*
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* This application is an engine for MQTT v3.1. It supports QoS Levels 0 and 1.
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*
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* MQTT is a Client Server publish/subscribe messaging transport protocol.
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* It is light weight, open, simple, and designed so as to be easy to implement.
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* These characteristics make it ideal for use in many situations, including
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* constrained environments such as for communication in Machine to Machine
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* (M2M) and Internet of Things (IoT) contexts where a small code footprint is
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* required and/or network bandwidth is at a premium.
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*
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* The protocol runs over TCP/IP, more specifically tcp_socket.
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* Its features include:
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*
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* - Use of the publish/subscribe message pattern which provides
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* one-to-many message distribution and decoupling of applications.
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* - A messaging transport that is agnostic to the content of the payload.
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* Three qualities of service for message delivery:
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* -- "At most once" (0), where messages are delivered according to the best
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* efforts of the operating environment. Message loss can occur.
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* This level could be used, for example, with ambient sensor data where it
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* does not matter if an individual reading is lost as the next one will be
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* published soon after.
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* --"At least once" (1), where messages are assured to arrive but duplicates
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* can occur.
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* -- "Exactly once" (2), where message are assured to arrive exactly once.
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* This level could be used, for example, with billing systems where duplicate
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* or lost messages could lead to incorrect charges being applied. This QoS
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* level is currently not supported in this implementation.
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*
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* - A small transport overhead and protocol exchanges minimized to reduce
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* network traffic.
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* - A mechanism, Last Will, to notify interested parties when an abnormal
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* disconnection occurs.
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*
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* The protocol specification and other useful information can be found
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* here: http://mqtt.org
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*
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*/
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/**
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* \file
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* Header file for the Contiki MQTT engine
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*
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* \author
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* Texas Instruments
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*/
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/*---------------------------------------------------------------------------*/
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#ifndef MQTT_H_
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#define MQTT_H_
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include "contiki-net.h"
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#include "contiki-lib.h"
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#include "lib/random.h"
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#include "sys/ctimer.h"
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#include "sys/etimer.h"
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#include "net/rpl/rpl.h"
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#include "net/ip/uip.h"
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#include "net/ipv6/uip-ds6.h"
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#include "dev/leds.h"
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#include "tcp-socket.h"
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#include "udp-socket.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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/*---------------------------------------------------------------------------*/
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/* Protocol constants */
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#define MQTT_CLIENT_ID_MAX_LEN 23
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/* Size of the underlying TCP buffers */
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#define MQTT_TCP_INPUT_BUFF_SIZE 512
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#define MQTT_TCP_OUTPUT_BUFF_SIZE 512
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#define MQTT_INPUT_BUFF_SIZE 512
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#define MQTT_MAX_TOPIC_LENGTH 64
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#define MQTT_MAX_TOPICS_PER_SUBSCRIBE 1
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#define MQTT_FHDR_SIZE 1
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#define MQTT_MAX_REMAINING_LENGTH_BYTES 4
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#define MQTT_PROTOCOL_VERSION 3
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#define MQTT_PROTOCOL_NAME "MQIsdp"
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#define MQTT_TOPIC_MAX_LENGTH 128
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/*---------------------------------------------------------------------------*/
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/*
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* Debug configuration, this is similar but not exactly like the Debugging
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* System discussion at https://github.com/contiki-os/contiki/wiki.
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*/
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#define DEBUG_MQTT 0
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#if DEBUG_MQTT == 1
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#define DBG(...) printf(__VA_ARGS__)
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#else
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#define DBG(...)
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#endif /* DEBUG */
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/*---------------------------------------------------------------------------*/
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extern process_event_t mqtt_update_event;
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/* Forward declaration */
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struct mqtt_connection;
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typedef enum {
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MQTT_RETAIN_OFF,
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MQTT_RETAIN_ON,
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} mqtt_retain_t;
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/**
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* \brief MQTT engine events
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*/
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typedef enum {
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MQTT_EVENT_CONNECTED,
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MQTT_EVENT_DISCONNECTED,
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MQTT_EVENT_SUBACK,
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MQTT_EVENT_UNSUBACK,
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MQTT_EVENT_PUBLISH,
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MQTT_EVENT_PUBACK,
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/* Errors */
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MQTT_EVENT_ERROR = 0x80,
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MQTT_EVENT_PROTOCOL_ERROR,
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MQTT_EVENT_CONNECTION_REFUSED_ERROR,
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MQTT_EVENT_DNS_ERROR,
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MQTT_EVENT_NOT_IMPLEMENTED_ERROR,
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/* Add more */
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} mqtt_event_t;
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typedef enum {
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MQTT_STATUS_OK,
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MQTT_STATUS_OUT_QUEUE_FULL,
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|
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/* Errors */
|
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MQTT_STATUS_ERROR = 0x80,
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MQTT_STATUS_NOT_CONNECTED_ERROR,
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MQTT_STATUS_INVALID_ARGS_ERROR,
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MQTT_STATUS_DNS_ERROR,
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} mqtt_status_t;
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typedef enum {
|
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MQTT_QOS_LEVEL_0,
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MQTT_QOS_LEVEL_1,
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MQTT_QOS_LEVEL_2,
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} mqtt_qos_level_t;
|
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typedef enum {
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MQTT_QOS_STATE_NO_ACK,
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MQTT_QOS_STATE_GOT_ACK,
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/* Expand for QoS 2 */
|
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} mqtt_qos_state_t;
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/*
|
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* This is the state of the connection itself.
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*
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* N.B. The order is important because of runtime checks on how far the
|
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* connection has proceeded.
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||||
*/
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typedef enum {
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MQTT_CONN_STATE_ERROR,
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MQTT_CONN_STATE_DNS_ERROR,
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MQTT_CONN_STATE_DISCONNECTING,
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|
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MQTT_CONN_STATE_NOT_CONNECTED,
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MQTT_CONN_STATE_DNS_LOOKUP,
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MQTT_CONN_STATE_TCP_CONNECTING,
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MQTT_CONN_STATE_TCP_CONNECTED,
|
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MQTT_CONN_STATE_CONNECTING_TO_BROKER,
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MQTT_CONN_STATE_CONNECTED_TO_BROKER,
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MQTT_CONN_STATE_SENDING_MQTT_DISCONNECT,
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MQTT_CONN_STATE_ABORT_IMMEDIATE,
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} mqtt_conn_state_t;
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/*---------------------------------------------------------------------------*/
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struct mqtt_string {
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char *string;
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uint16_t length;
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};
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/*
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* Note that the pairing mid <-> QoS level only applies one-to-one if we only
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* allow the subscription of one topic at a time. Otherwise we will have an
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* ordered list of QoS levels corresponding to the order of topics.
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*
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* This could be part of a union of event data structures.
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*/
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struct mqtt_suback_event {
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uint16_t mid;
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mqtt_qos_level_t qos_level;
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};
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/* This is the MQTT message that is exposed to the end user. */
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struct mqtt_message {
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uint32_t mid;
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char topic[MQTT_MAX_TOPIC_LENGTH + 1]; /* +1 for string termination */
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uint8_t *payload_chunk;
|
||||
uint16_t payload_chunk_length;
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|
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uint8_t first_chunk;
|
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uint16_t payload_length;
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uint16_t payload_left;
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};
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/* This struct represents a packet received from the MQTT server. */
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struct mqtt_in_packet {
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/* Used by the list interface, must be first in the struct. */
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struct mqtt_connection *next;
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/* Total bytes read so far. Compared to the remaining length to to decide when
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* we've read the payload. */
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uint32_t byte_counter;
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uint8_t packet_received;
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uint8_t fhdr;
|
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uint16_t remaining_length;
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uint16_t mid;
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|
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/* Helper variables needed to decode the remaining_length */
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uint8_t remaining_multiplier;
|
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uint8_t has_remaining_length;
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uint8_t remaining_length_bytes;
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|
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/* Not the same as payload in the MQTT sense, it also contains the variable
|
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* header.
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*/
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uint8_t payload_pos;
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uint8_t payload[MQTT_INPUT_BUFF_SIZE];
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|
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/* Message specific data */
|
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uint16_t topic_len;
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uint16_t topic_pos;
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uint8_t topic_len_received;
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uint8_t topic_received;
|
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};
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/* This struct represents a packet sent to the MQTT server. */
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struct mqtt_out_packet {
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uint8_t fhdr;
|
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uint32_t remaining_length;
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uint8_t remaining_length_enc[MQTT_MAX_REMAINING_LENGTH_BYTES];
|
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uint8_t remaining_length_enc_bytes;
|
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uint16_t mid;
|
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char *topic;
|
||||
uint16_t topic_length;
|
||||
uint8_t *payload;
|
||||
uint32_t payload_size;
|
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mqtt_qos_level_t qos;
|
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mqtt_qos_state_t qos_state;
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mqtt_retain_t retain;
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};
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/*---------------------------------------------------------------------------*/
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/**
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* \brief MQTT event callback function
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||||
* \param m A pointer to a MQTT connection
|
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* \param event The event number
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* \param data A user-defined pointer
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*
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* The MQTT socket event callback function gets called whenever there is an
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* event on a MQTT connection, such as the connection getting connected
|
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* or closed.
|
||||
*/
|
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typedef void (*mqtt_event_callback_t)(struct mqtt_connection *m,
|
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mqtt_event_t event,
|
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void *data);
|
||||
|
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typedef void (*mqtt_topic_callback_t)(struct mqtt_connection *m,
|
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struct mqtt_message *msg);
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||||
/*---------------------------------------------------------------------------*/
|
||||
struct mqtt_will {
|
||||
struct mqtt_string topic;
|
||||
struct mqtt_string message;
|
||||
mqtt_qos_level_t qos;
|
||||
};
|
||||
|
||||
struct mqtt_credentials {
|
||||
struct mqtt_string username;
|
||||
struct mqtt_string password;
|
||||
};
|
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|
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struct mqtt_connection {
|
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/* Used by the list interface, must be first in the struct */
|
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struct mqtt_connection *next;
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struct timer t;
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||||
|
||||
struct mqtt_string client_id;
|
||||
|
||||
uint8_t connect_vhdr_flags;
|
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uint8_t auto_reconnect;
|
||||
|
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uint16_t keep_alive;
|
||||
struct ctimer keep_alive_timer;
|
||||
uint8_t waiting_for_pingresp;
|
||||
|
||||
struct mqtt_will will;
|
||||
struct mqtt_credentials credentials;
|
||||
|
||||
mqtt_conn_state_t state;
|
||||
mqtt_event_callback_t event_callback;
|
||||
|
||||
/* Internal data */
|
||||
uint16_t mid_counter;
|
||||
|
||||
/* Used for communication between MQTT API and APP */
|
||||
uint8_t out_queue_full;
|
||||
struct process *app_process;
|
||||
|
||||
/* Outgoing data related */
|
||||
uint8_t *out_buffer_ptr;
|
||||
uint8_t out_buffer[MQTT_TCP_OUTPUT_BUFF_SIZE];
|
||||
uint8_t out_buffer_sent;
|
||||
struct mqtt_out_packet out_packet;
|
||||
struct pt out_proto_thread;
|
||||
uint32_t out_write_pos;
|
||||
uint16_t max_segment_size;
|
||||
|
||||
/* Incoming data related */
|
||||
uint8_t in_buffer[MQTT_TCP_INPUT_BUFF_SIZE];
|
||||
struct mqtt_in_packet in_packet;
|
||||
struct mqtt_message in_publish_msg;
|
||||
|
||||
/* TCP related information */
|
||||
char *server_host;
|
||||
uip_ipaddr_t server_ip;
|
||||
uint16_t server_port;
|
||||
struct tcp_socket socket;
|
||||
};
|
||||
/* This is the API exposed to the user. */
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* \brief Initializes the MQTT engine.
|
||||
* \param conn A pointer to the MQTT connection.
|
||||
* \param app_process A pointer to the application process handling the MQTT
|
||||
* connection.
|
||||
* \param client_id A pointer to the MQTT client ID.
|
||||
* \param event_callback Callback function responsible for handling the
|
||||
* callback from MQTT engine.
|
||||
* \param max_segment_size The TCP segment size to use for this MQTT/TCP
|
||||
* connection.
|
||||
* \return MQTT_STATUS_OK or MQTT_STATUS_INVALID_ARGS_ERROR
|
||||
*
|
||||
* This function initializes the MQTT engine and shall be called before any
|
||||
* other MQTT function.
|
||||
*/
|
||||
mqtt_status_t mqtt_register(struct mqtt_connection *conn,
|
||||
struct process *app_process,
|
||||
char *client_id,
|
||||
mqtt_event_callback_t event_callback,
|
||||
uint16_t max_segment_size);
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* \brief Connects to a MQTT broker.
|
||||
* \param conn A pointer to the MQTT connection.
|
||||
* \param host IP address of the broker to connect to.
|
||||
* \param port Port of the broker to connect to, default is MQTT port is 1883.
|
||||
* \param keep_alive Keep alive timer in seconds. Used by broker to handle
|
||||
* client disc. Defines the maximum time interval between two messages
|
||||
* from the client. Shall be min 1.5 x report interval.
|
||||
* \return MQTT_STATUS_OK or an error status
|
||||
*
|
||||
* This function connects to a MQTT broker.
|
||||
*/
|
||||
mqtt_status_t mqtt_connect(struct mqtt_connection *conn,
|
||||
char *host,
|
||||
uint16_t port,
|
||||
uint16_t keep_alive);
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* \brief Disconnects from a MQTT broker.
|
||||
* \param conn A pointer to the MQTT connection.
|
||||
*
|
||||
* This function disconnects from a MQTT broker.
|
||||
*/
|
||||
void mqtt_disconnect(struct mqtt_connection *conn);
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* \brief Subscribes to a MQTT topic.
|
||||
* \param conn A pointer to the MQTT connection.
|
||||
* \param mid A pointer to message ID.
|
||||
* \param topic A pointer to the topic to subscribe to.
|
||||
* \param qos_level Quality Of Service level to use. Currently supports 0, 1.
|
||||
* \return MQTT_STATUS_OK or some error status
|
||||
*
|
||||
* This function subscribes to a topic on a MQTT broker.
|
||||
*/
|
||||
mqtt_status_t mqtt_subscribe(struct mqtt_connection *conn,
|
||||
uint16_t *mid,
|
||||
char *topic,
|
||||
mqtt_qos_level_t qos_level);
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* \brief Unsubscribes from a MQTT topic.
|
||||
* \param conn A pointer to the MQTT connection.
|
||||
* \param mid A pointer to message ID.
|
||||
* \param topic A pointer to the topic to unsubscribe from.
|
||||
* \return MQTT_STATUS_OK or some error status
|
||||
*
|
||||
* This function unsubscribes from a topic on a MQTT broker.
|
||||
*/
|
||||
mqtt_status_t mqtt_unsubscribe(struct mqtt_connection *conn,
|
||||
uint16_t *mid,
|
||||
char *topic);
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* \brief Publish to a MQTT topic.
|
||||
* \param conn A pointer to the MQTT connection.
|
||||
* \param mid A pointer to message ID.
|
||||
* \param topic A pointer to the topic to subscribe to.
|
||||
* \param payload A pointer to the topic payload.
|
||||
* \param payload_size Payload size.
|
||||
* \param qos_level Quality Of Service level to use. Currently supports 0, 1.
|
||||
* \param retain If the RETAIN flag is set to 1, in a PUBLISH Packet sent by a
|
||||
* Client to a Server, the Server MUST store the Application Message
|
||||
* and its QoS, so that it can be delivered to future subscribers whose
|
||||
* subscriptions match its topic name
|
||||
* \return MQTT_STATUS_OK or some error status
|
||||
*
|
||||
* This function publishes to a topic on a MQTT broker.
|
||||
*/
|
||||
mqtt_status_t mqtt_publish(struct mqtt_connection *conn,
|
||||
uint16_t *mid,
|
||||
char *topic,
|
||||
uint8_t *payload,
|
||||
uint32_t payload_size,
|
||||
mqtt_qos_level_t qos_level,
|
||||
mqtt_retain_t retain);
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* \brief Set the user name and password for a MQTT client.
|
||||
* \param conn A pointer to the MQTT connection.
|
||||
* \param username A pointer to the user name.
|
||||
* \param password A pointer to the password.
|
||||
*
|
||||
* This function sets clients user name and password to use when connecting to
|
||||
* a MQTT broker.
|
||||
*/
|
||||
void mqtt_set_username_password(struct mqtt_connection *conn,
|
||||
char *username,
|
||||
char *password);
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* \brief Set the last will topic and message for a MQTT client.
|
||||
* \param conn A pointer to the MQTT connection.
|
||||
* \param topic A pointer to the Last Will topic.
|
||||
* \param message A pointer to the Last Will message (payload).
|
||||
* \param qos The desired QoS level.
|
||||
*
|
||||
* This function sets clients Last Will topic and message (payload).
|
||||
* If the Will Flag is set to 1 (using the function) this indicates that,
|
||||
* if the Connect request is accepted, a Will Message MUST be stored on the
|
||||
* Server and associated with the Network Connection. The Will Message MUST
|
||||
* be published when the Network Connection is subsequently closed.
|
||||
*
|
||||
* This functionality can be used to get notified that a device has
|
||||
* disconnected from the broker.
|
||||
*
|
||||
*/
|
||||
void mqtt_set_last_will(struct mqtt_connection *conn,
|
||||
char *topic,
|
||||
char *message,
|
||||
mqtt_qos_level_t qos);
|
||||
|
||||
#define mqtt_connected(conn) \
|
||||
((conn)->state == MQTT_CONN_STATE_CONNECTED_TO_BROKER ? 1 : 0)
|
||||
|
||||
#define mqtt_ready(conn) \
|
||||
(!(conn)->out_queue_full && mqtt_connected((conn)))
|
||||
/*---------------------------------------------------------------------------*/
|
||||
#endif /* MQTT_H_ */
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* @}
|
||||
* @}
|
||||
*/
|
10
examples/cc2538dk/mqtt-demo/Makefile
Normal file
10
examples/cc2538dk/mqtt-demo/Makefile
Normal file
|
@ -0,0 +1,10 @@
|
|||
DEFINES+=PROJECT_CONF_H=\"project-conf.h\"
|
||||
|
||||
all: mqtt-demo
|
||||
|
||||
CONTIKI_WITH_IPV6 = 1
|
||||
|
||||
APPS += mqtt
|
||||
|
||||
CONTIKI=../../..
|
||||
include $(CONTIKI)/Makefile.include
|
1
examples/cc2538dk/mqtt-demo/Makefile.target
Normal file
1
examples/cc2538dk/mqtt-demo/Makefile.target
Normal file
|
@ -0,0 +1 @@
|
|||
TARGET = cc2538dk
|
62
examples/cc2538dk/mqtt-demo/README.md
Normal file
62
examples/cc2538dk/mqtt-demo/README.md
Normal file
|
@ -0,0 +1,62 @@
|
|||
MQTT Demo
|
||||
=========
|
||||
The MQTT client can be used to:
|
||||
|
||||
* Publish sensor readings to an MQTT broker.
|
||||
* Subscribe to a topic and receive commands from an MQTT broker
|
||||
|
||||
The demo will give some visual feedback with the green LED:
|
||||
* Very fast blinking: Searching for a network
|
||||
* Fast blinking: Connecting to broker
|
||||
* Slow, long blinking: Sending a publish message
|
||||
|
||||
Publishing
|
||||
----------
|
||||
By default the example will attempt to publish readings to an MQTT broker
|
||||
running on the IPv6 address specified as `MQTT_DEMO_BROKER_IP_ADDR` in
|
||||
`project-conf.h`. This functionality was tested successfully with
|
||||
[mosquitto](http://mosquitto.org/).
|
||||
|
||||
The publish messages include sensor readings but also some other information,
|
||||
such as device uptime in seconds and a message sequence number. The demo will
|
||||
publish to topic `iot-2/evt/status/fmt/json`. The device will connect using
|
||||
client-id `d:quickstart:cc2538:<device-id>`, where `<device-id>` gets
|
||||
constructed from the device's IEEE address.
|
||||
|
||||
Subscribing
|
||||
-----------
|
||||
You can also subscribe to topics and receive commands, but this will only
|
||||
work if you use "Org ID" != 'quickstart'. To achieve this, you will need to
|
||||
change 'Org ID' (`DEFAULT_ORG_ID`). In this scenario, the device will subscribe
|
||||
to:
|
||||
|
||||
`iot-2/cmd/+/fmt/json`
|
||||
|
||||
You can then use this to toggle LEDs. To do this, you can for example
|
||||
use mosquitto client to publish to `iot-2/cmd/leds/fmt/json`. So, to change
|
||||
the state of an LED, you would do this:
|
||||
|
||||
`mosquitto_pub -h <broker IP> -m "1" -t iot-2/cmd/leds/fmt/json`
|
||||
|
||||
Where `broker IP` should be replaced with the IP address of your mosquitto
|
||||
broker (the one where you device has subscribed). Replace `-m "1'` with `-m "0"`
|
||||
to turn the LED back off.
|
||||
|
||||
Bear in mind that, even though the topic suggests that messages are of json
|
||||
format, they are in fact not. This was done in order to avoid linking a json
|
||||
parser into the firmware. This comment only applies to parsing incoming
|
||||
messages, outgoing publish messages use proper json payload.
|
||||
|
||||
IBM Quickstart Service
|
||||
----------------------
|
||||
It is also possible to publish to IBM's quickstart service. To do so, you need
|
||||
to undefine `MQTT_DEMO_BROKER_IP_ADDR`.
|
||||
|
||||
The device will then try to connect to IBM's quickstart over NAT64, so you will
|
||||
need a NAT64 gateway in your network to make this work. A guide on how to
|
||||
setup NAT64 is out of scope here.
|
||||
|
||||
If you want to use IBM's cloud service with a registered device, change
|
||||
'Org ID' (`DEFAULT_ORG_ID`) and provide the 'Auth Token' (`DEFAULT_AUTH_TOKEN`),
|
||||
which acts as a 'password', but bear in mind that it gets transported in clear
|
||||
text.
|
735
examples/cc2538dk/mqtt-demo/mqtt-demo.c
Normal file
735
examples/cc2538dk/mqtt-demo/mqtt-demo.c
Normal file
|
@ -0,0 +1,735 @@
|
|||
/*
|
||||
* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.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 copyright holder 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 COPYRIGHT HOLDERS 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
|
||||
* COPYRIGHT HOLDER 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.
|
||||
*/
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/** \addtogroup cc2538-examples
|
||||
* @{
|
||||
*
|
||||
* \defgroup cc2538-mqtt-demo CC2538DK MQTT Demo Project
|
||||
*
|
||||
* Demonstrates MQTT functionality. Works with IBM Quickstart as well as
|
||||
* mosquitto.
|
||||
* @{
|
||||
*
|
||||
* \file
|
||||
* An MQTT example for the cc2538dk platform
|
||||
*/
|
||||
/*---------------------------------------------------------------------------*/
|
||||
#include "contiki-conf.h"
|
||||
#include "rpl/rpl-private.h"
|
||||
#include "mqtt.h"
|
||||
#include "net/rpl/rpl.h"
|
||||
#include "net/ip/uip.h"
|
||||
#include "net/ipv6/uip-icmp6.h"
|
||||
#include "net/ipv6/sicslowpan.h"
|
||||
#include "sys/etimer.h"
|
||||
#include "sys/ctimer.h"
|
||||
#include "lib/sensors.h"
|
||||
#include "dev/button-sensor.h"
|
||||
#include "dev/leds.h"
|
||||
#include "dev/adc-sensor.h"
|
||||
|
||||
#include <string.h>
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/*
|
||||
* IBM server: messaging.quickstart.internetofthings.ibmcloud.com
|
||||
* (184.172.124.189) mapped in an NAT64 (prefix 64:ff9b::/96) IPv6 address
|
||||
* Note: If not able to connect; lookup the IP address again as it may change.
|
||||
*
|
||||
* Alternatively, publish to a local MQTT broker (e.g. mosquitto) running on
|
||||
* the node that hosts your border router
|
||||
*/
|
||||
#ifdef MQTT_DEMO_BROKER_IP_ADDR
|
||||
static const char *broker_ip = MQTT_DEMO_BROKER_IP_ADDR;
|
||||
#define DEFAULT_ORG_ID "mqtt-demo"
|
||||
#else
|
||||
static const char *broker_ip = "0064:ff9b:0000:0000:0000:0000:b8ac:7cbd";
|
||||
#define DEFAULT_ORG_ID "quickstart"
|
||||
#endif
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/*
|
||||
* A timeout used when waiting for something to happen (e.g. to connect or to
|
||||
* disconnect)
|
||||
*/
|
||||
#define STATE_MACHINE_PERIODIC (CLOCK_SECOND >> 1)
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* Provide visible feedback via LEDS during various states */
|
||||
/* When connecting to broker */
|
||||
#define CONNECTING_LED_DURATION (CLOCK_SECOND >> 2)
|
||||
|
||||
/* Each time we try to publish */
|
||||
#define PUBLISH_LED_ON_DURATION (CLOCK_SECOND)
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* Connections and reconnections */
|
||||
#define RETRY_FOREVER 0xFF
|
||||
#define RECONNECT_INTERVAL (CLOCK_SECOND * 2)
|
||||
|
||||
/*
|
||||
* Number of times to try reconnecting to the broker.
|
||||
* Can be a limited number (e.g. 3, 10 etc) or can be set to RETRY_FOREVER
|
||||
*/
|
||||
#define RECONNECT_ATTEMPTS RETRY_FOREVER
|
||||
#define CONNECTION_STABLE_TIME (CLOCK_SECOND * 5)
|
||||
static struct timer connection_life;
|
||||
static uint8_t connect_attempt;
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* Various states */
|
||||
static uint8_t state;
|
||||
#define STATE_INIT 0
|
||||
#define STATE_REGISTERED 1
|
||||
#define STATE_CONNECTING 2
|
||||
#define STATE_CONNECTED 3
|
||||
#define STATE_PUBLISHING 4
|
||||
#define STATE_DISCONNECTED 5
|
||||
#define STATE_NEWCONFIG 6
|
||||
#define STATE_CONFIG_ERROR 0xFE
|
||||
#define STATE_ERROR 0xFF
|
||||
/*---------------------------------------------------------------------------*/
|
||||
#define CONFIG_ORG_ID_LEN 32
|
||||
#define CONFIG_TYPE_ID_LEN 32
|
||||
#define CONFIG_AUTH_TOKEN_LEN 32
|
||||
#define CONFIG_EVENT_TYPE_ID_LEN 32
|
||||
#define CONFIG_CMD_TYPE_LEN 8
|
||||
#define CONFIG_IP_ADDR_STR_LEN 64
|
||||
/*---------------------------------------------------------------------------*/
|
||||
#define RSSI_MEASURE_INTERVAL_MAX 86400 /* secs: 1 day */
|
||||
#define RSSI_MEASURE_INTERVAL_MIN 5 /* secs */
|
||||
#define PUBLISH_INTERVAL_MAX 86400 /* secs: 1 day */
|
||||
#define PUBLISH_INTERVAL_MIN 5 /* secs */
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* A timeout used when waiting to connect to a network */
|
||||
#define NET_CONNECT_PERIODIC (CLOCK_SECOND >> 2)
|
||||
#define NO_NET_LED_DURATION (NET_CONNECT_PERIODIC >> 1)
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* Default configuration values */
|
||||
#define DEFAULT_TYPE_ID "cc2538"
|
||||
#define DEFAULT_AUTH_TOKEN "AUTHZ"
|
||||
#define DEFAULT_EVENT_TYPE_ID "status"
|
||||
#define DEFAULT_SUBSCRIBE_CMD_TYPE "+"
|
||||
#define DEFAULT_BROKER_PORT 1883
|
||||
#define DEFAULT_PUBLISH_INTERVAL (30 * CLOCK_SECOND)
|
||||
#define DEFAULT_KEEP_ALIVE_TIMER 60
|
||||
#define DEFAULT_RSSI_MEAS_INTERVAL (CLOCK_SECOND * 30)
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* Take a sensor reading on button press */
|
||||
#define PUBLISH_TRIGGER &button_sensor
|
||||
|
||||
/* Payload length of ICMPv6 echo requests used to measure RSSI with def rt */
|
||||
#define ECHO_REQ_PAYLOAD_LEN 20
|
||||
/*---------------------------------------------------------------------------*/
|
||||
PROCESS_NAME(mqtt_demo_process);
|
||||
AUTOSTART_PROCESSES(&mqtt_demo_process);
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* \brief Data structure declaration for the MQTT client configuration
|
||||
*/
|
||||
typedef struct mqtt_client_config {
|
||||
char org_id[CONFIG_ORG_ID_LEN];
|
||||
char type_id[CONFIG_TYPE_ID_LEN];
|
||||
char auth_token[CONFIG_AUTH_TOKEN_LEN];
|
||||
char event_type_id[CONFIG_EVENT_TYPE_ID_LEN];
|
||||
char broker_ip[CONFIG_IP_ADDR_STR_LEN];
|
||||
char cmd_type[CONFIG_CMD_TYPE_LEN];
|
||||
clock_time_t pub_interval;
|
||||
int def_rt_ping_interval;
|
||||
uint16_t broker_port;
|
||||
} mqtt_client_config_t;
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* Maximum TCP segment size for outgoing segments of our socket */
|
||||
#define MAX_TCP_SEGMENT_SIZE 32
|
||||
/*---------------------------------------------------------------------------*/
|
||||
#define STATUS_LED LEDS_GREEN
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/*
|
||||
* Buffers for Client ID and Topic.
|
||||
* Make sure they are large enough to hold the entire respective string
|
||||
*
|
||||
* d:quickstart:status:EUI64 is 32 bytes long
|
||||
* iot-2/evt/status/fmt/json is 25 bytes
|
||||
* We also need space for the null termination
|
||||
*/
|
||||
#define BUFFER_SIZE 64
|
||||
static char client_id[BUFFER_SIZE];
|
||||
static char pub_topic[BUFFER_SIZE];
|
||||
static char sub_topic[BUFFER_SIZE];
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/*
|
||||
* The main MQTT buffers.
|
||||
* We will need to increase if we start publishing more data.
|
||||
*/
|
||||
#define APP_BUFFER_SIZE 512
|
||||
static struct mqtt_connection conn;
|
||||
static char app_buffer[APP_BUFFER_SIZE];
|
||||
/*---------------------------------------------------------------------------*/
|
||||
#define QUICKSTART "quickstart"
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static struct mqtt_message *msg_ptr = 0;
|
||||
static struct etimer publish_periodic_timer;
|
||||
static struct ctimer ct;
|
||||
static char *buf_ptr;
|
||||
static uint16_t seq_nr_value = 0;
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* Parent RSSI functionality */
|
||||
static struct uip_icmp6_echo_reply_notification echo_reply_notification;
|
||||
static struct etimer echo_request_timer;
|
||||
static int def_rt_rssi = 0;
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static mqtt_client_config_t conf;
|
||||
/*---------------------------------------------------------------------------*/
|
||||
PROCESS(mqtt_demo_process, "MQTT Demo");
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
ipaddr_sprintf(char *buf, uint8_t buf_len, const uip_ipaddr_t *addr)
|
||||
{
|
||||
uint16_t a;
|
||||
uint8_t len = 0;
|
||||
int i, f;
|
||||
for(i = 0, f = 0; i < sizeof(uip_ipaddr_t); i += 2) {
|
||||
a = (addr->u8[i] << 8) + addr->u8[i + 1];
|
||||
if(a == 0 && f >= 0) {
|
||||
if(f++ == 0) {
|
||||
len += snprintf(&buf[len], buf_len - len, "::");
|
||||
}
|
||||
} else {
|
||||
if(f > 0) {
|
||||
f = -1;
|
||||
} else if(i > 0) {
|
||||
len += snprintf(&buf[len], buf_len - len, ":");
|
||||
}
|
||||
len += snprintf(&buf[len], buf_len - len, "%x", a);
|
||||
}
|
||||
}
|
||||
|
||||
return len;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
echo_reply_handler(uip_ipaddr_t *source, uint8_t ttl, uint8_t *data,
|
||||
uint16_t datalen)
|
||||
{
|
||||
if(uip_ip6addr_cmp(source, uip_ds6_defrt_choose())) {
|
||||
def_rt_rssi = sicslowpan_get_last_rssi();
|
||||
}
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
publish_led_off(void *d)
|
||||
{
|
||||
leds_off(STATUS_LED);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
pub_handler(const char *topic, uint16_t topic_len, const uint8_t *chunk,
|
||||
uint16_t chunk_len)
|
||||
{
|
||||
DBG("Pub Handler: topic='%s' (len=%u), chunk_len=%u\n", topic, topic_len,
|
||||
chunk_len);
|
||||
|
||||
/* If we don't like the length, ignore */
|
||||
if(topic_len != 23 || chunk_len != 1) {
|
||||
printf("Incorrect topic or chunk len. Ignored\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* If the format != json, ignore */
|
||||
if(strncmp(&topic[topic_len - 4], "json", 4) != 0) {
|
||||
printf("Incorrect format\n");
|
||||
}
|
||||
|
||||
if(strncmp(&topic[10], "leds", 4) == 0) {
|
||||
if(chunk[0] == '1') {
|
||||
leds_on(LEDS_RED);
|
||||
} else if(chunk[0] == '0') {
|
||||
leds_off(LEDS_RED);
|
||||
}
|
||||
return;
|
||||
}
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
mqtt_event(struct mqtt_connection *m, mqtt_event_t event, void *data)
|
||||
{
|
||||
switch(event) {
|
||||
case MQTT_EVENT_CONNECTED: {
|
||||
DBG("APP - Application has a MQTT connection\n");
|
||||
timer_set(&connection_life, CONNECTION_STABLE_TIME);
|
||||
state = STATE_CONNECTED;
|
||||
break;
|
||||
}
|
||||
case MQTT_EVENT_DISCONNECTED: {
|
||||
DBG("APP - MQTT Disconnect. Reason %u\n", *((mqtt_event_t *)data));
|
||||
|
||||
state = STATE_DISCONNECTED;
|
||||
process_poll(&mqtt_demo_process);
|
||||
break;
|
||||
}
|
||||
case MQTT_EVENT_PUBLISH: {
|
||||
msg_ptr = data;
|
||||
|
||||
/* Implement first_flag in publish message? */
|
||||
if(msg_ptr->first_chunk) {
|
||||
msg_ptr->first_chunk = 0;
|
||||
DBG("APP - Application received a publish on topic '%s'. Payload "
|
||||
"size is %i bytes. Content:\n\n",
|
||||
msg_ptr->topic, msg_ptr->payload_length);
|
||||
}
|
||||
|
||||
pub_handler(msg_ptr->topic, strlen(msg_ptr->topic), msg_ptr->payload_chunk,
|
||||
msg_ptr->payload_length);
|
||||
break;
|
||||
}
|
||||
case MQTT_EVENT_SUBACK: {
|
||||
DBG("APP - Application is subscribed to topic successfully\n");
|
||||
break;
|
||||
}
|
||||
case MQTT_EVENT_UNSUBACK: {
|
||||
DBG("APP - Application is unsubscribed to topic successfully\n");
|
||||
break;
|
||||
}
|
||||
case MQTT_EVENT_PUBACK: {
|
||||
DBG("APP - Publishing complete.\n");
|
||||
break;
|
||||
}
|
||||
default:
|
||||
DBG("APP - Application got a unhandled MQTT event: %i\n", event);
|
||||
break;
|
||||
}
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static int
|
||||
construct_pub_topic(void)
|
||||
{
|
||||
int len = snprintf(pub_topic, BUFFER_SIZE, "iot-2/evt/%s/fmt/json",
|
||||
conf.event_type_id);
|
||||
|
||||
/* len < 0: Error. Len >= BUFFER_SIZE: Buffer too small */
|
||||
if(len < 0 || len >= BUFFER_SIZE) {
|
||||
printf("Pub Topic: %d, Buffer %d\n", len, BUFFER_SIZE);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static int
|
||||
construct_sub_topic(void)
|
||||
{
|
||||
int len = snprintf(sub_topic, BUFFER_SIZE, "iot-2/cmd/%s/fmt/json",
|
||||
conf.cmd_type);
|
||||
|
||||
/* len < 0: Error. Len >= BUFFER_SIZE: Buffer too small */
|
||||
if(len < 0 || len >= BUFFER_SIZE) {
|
||||
printf("Sub Topic: %d, Buffer %d\n", len, BUFFER_SIZE);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static int
|
||||
construct_client_id(void)
|
||||
{
|
||||
int len = snprintf(client_id, BUFFER_SIZE, "d:%s:%s:%02x%02x%02x%02x%02x%02x",
|
||||
conf.org_id, conf.type_id,
|
||||
linkaddr_node_addr.u8[0], linkaddr_node_addr.u8[1],
|
||||
linkaddr_node_addr.u8[2], linkaddr_node_addr.u8[5],
|
||||
linkaddr_node_addr.u8[6], linkaddr_node_addr.u8[7]);
|
||||
|
||||
/* len < 0: Error. Len >= BUFFER_SIZE: Buffer too small */
|
||||
if(len < 0 || len >= BUFFER_SIZE) {
|
||||
printf("Client ID: %d, Buffer %d\n", len, BUFFER_SIZE);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
update_config(void)
|
||||
{
|
||||
if(construct_client_id() == 0) {
|
||||
/* Fatal error. Client ID larger than the buffer */
|
||||
state = STATE_CONFIG_ERROR;
|
||||
return;
|
||||
}
|
||||
|
||||
if(construct_sub_topic() == 0) {
|
||||
/* Fatal error. Topic larger than the buffer */
|
||||
state = STATE_CONFIG_ERROR;
|
||||
return;
|
||||
}
|
||||
|
||||
if(construct_pub_topic() == 0) {
|
||||
/* Fatal error. Topic larger than the buffer */
|
||||
state = STATE_CONFIG_ERROR;
|
||||
return;
|
||||
}
|
||||
|
||||
/* Reset the counter */
|
||||
seq_nr_value = 0;
|
||||
|
||||
state = STATE_INIT;
|
||||
|
||||
/*
|
||||
* Schedule next timer event ASAP
|
||||
*
|
||||
* If we entered an error state then we won't do anything when it fires.
|
||||
*
|
||||
* Since the error at this stage is a config error, we will only exit this
|
||||
* error state if we get a new config.
|
||||
*/
|
||||
etimer_set(&publish_periodic_timer, 0);
|
||||
|
||||
return;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static int
|
||||
init_config()
|
||||
{
|
||||
/* Populate configuration with default values */
|
||||
memset(&conf, 0, sizeof(mqtt_client_config_t));
|
||||
|
||||
memcpy(conf.org_id, DEFAULT_ORG_ID, strlen(DEFAULT_ORG_ID));
|
||||
memcpy(conf.type_id, DEFAULT_TYPE_ID, strlen(DEFAULT_TYPE_ID));
|
||||
memcpy(conf.auth_token, DEFAULT_AUTH_TOKEN, strlen(DEFAULT_AUTH_TOKEN));
|
||||
memcpy(conf.event_type_id, DEFAULT_EVENT_TYPE_ID,
|
||||
strlen(DEFAULT_EVENT_TYPE_ID));
|
||||
memcpy(conf.broker_ip, broker_ip, strlen(broker_ip));
|
||||
memcpy(conf.cmd_type, DEFAULT_SUBSCRIBE_CMD_TYPE, 1);
|
||||
|
||||
conf.broker_port = DEFAULT_BROKER_PORT;
|
||||
conf.pub_interval = DEFAULT_PUBLISH_INTERVAL;
|
||||
conf.def_rt_ping_interval = DEFAULT_RSSI_MEAS_INTERVAL;
|
||||
|
||||
return 1;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
subscribe(void)
|
||||
{
|
||||
/* Publish MQTT topic in IBM quickstart format */
|
||||
mqtt_status_t status;
|
||||
|
||||
status = mqtt_subscribe(&conn, NULL, sub_topic, MQTT_QOS_LEVEL_0);
|
||||
|
||||
DBG("APP - Subscribing!\n");
|
||||
if(status == MQTT_STATUS_OUT_QUEUE_FULL) {
|
||||
DBG("APP - Tried to subscribe but command queue was full!\n");
|
||||
}
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
publish(void)
|
||||
{
|
||||
/* Publish MQTT topic in IBM quickstart format */
|
||||
int len;
|
||||
int remaining = APP_BUFFER_SIZE;
|
||||
int16_t value;
|
||||
|
||||
seq_nr_value++;
|
||||
|
||||
buf_ptr = app_buffer;
|
||||
|
||||
len = snprintf(buf_ptr, remaining,
|
||||
"{"
|
||||
"\"d\":{"
|
||||
"\"myName\":\"%s\","
|
||||
"\"Seq #\":%d,"
|
||||
"\"Uptime (sec)\":%lu",
|
||||
BOARD_STRING, seq_nr_value, clock_seconds());
|
||||
|
||||
if(len < 0 || len >= remaining) {
|
||||
printf("Buffer too short. Have %d, need %d + \\0\n", remaining, len);
|
||||
return;
|
||||
}
|
||||
|
||||
remaining -= len;
|
||||
buf_ptr += len;
|
||||
|
||||
/* Put our Default route's string representation in a buffer */
|
||||
char def_rt_str[64];
|
||||
memset(def_rt_str, 0, sizeof(def_rt_str));
|
||||
ipaddr_sprintf(def_rt_str, sizeof(def_rt_str), uip_ds6_defrt_choose());
|
||||
|
||||
len = snprintf(buf_ptr, remaining, ",\"Def Route\":\"%s\",\"RSSI (dBm)\":%d",
|
||||
def_rt_str, def_rt_rssi);
|
||||
|
||||
if(len < 0 || len >= remaining) {
|
||||
printf("Buffer too short. Have %d, need %d + \\0\n", remaining, len);
|
||||
return;
|
||||
}
|
||||
remaining -= len;
|
||||
buf_ptr += len;
|
||||
|
||||
value = adc_sensor.value(ADC_SENSOR_TEMP);
|
||||
len = snprintf(buf_ptr, remaining, ",\"On-Chip Temp (mC)\":%d",
|
||||
25000 + ((value >> 4) - 1422) * 10000 / 42);
|
||||
|
||||
if(len < 0 || len >= remaining) {
|
||||
printf("Buffer too short. Have %d, need %d + \\0\n", remaining, len);
|
||||
return;
|
||||
}
|
||||
remaining -= len;
|
||||
buf_ptr += len;
|
||||
|
||||
value = adc_sensor.value(ADC_SENSOR_VDD_3);
|
||||
len = snprintf(buf_ptr, remaining, ",\"VDD3 (mV)\":%d",
|
||||
value * (3 * 1190) / (2047 << 4));
|
||||
|
||||
if(len < 0 || len >= remaining) {
|
||||
printf("Buffer too short. Have %d, need %d + \\0\n", remaining, len);
|
||||
return;
|
||||
}
|
||||
remaining -= len;
|
||||
buf_ptr += len;
|
||||
|
||||
len = snprintf(buf_ptr, remaining, "}}");
|
||||
|
||||
if(len < 0 || len >= remaining) {
|
||||
printf("Buffer too short. Have %d, need %d + \\0\n", remaining, len);
|
||||
return;
|
||||
}
|
||||
|
||||
mqtt_publish(&conn, NULL, pub_topic, (uint8_t *)app_buffer,
|
||||
strlen(app_buffer), MQTT_QOS_LEVEL_0, MQTT_RETAIN_OFF);
|
||||
|
||||
DBG("APP - Publish!\n");
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
connect_to_broker(void)
|
||||
{
|
||||
/* Connect to MQTT server */
|
||||
mqtt_connect(&conn, conf.broker_ip, conf.broker_port,
|
||||
conf.pub_interval * 3);
|
||||
|
||||
state = STATE_CONNECTING;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
ping_parent(void)
|
||||
{
|
||||
if(uip_ds6_get_global(ADDR_PREFERRED) == NULL) {
|
||||
return;
|
||||
}
|
||||
|
||||
uip_icmp6_send(uip_ds6_defrt_choose(), ICMP6_ECHO_REQUEST, 0,
|
||||
ECHO_REQ_PAYLOAD_LEN);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
state_machine(void)
|
||||
{
|
||||
switch(state) {
|
||||
case STATE_INIT:
|
||||
/* If we have just been configured register MQTT connection */
|
||||
mqtt_register(&conn, &mqtt_demo_process, client_id, mqtt_event,
|
||||
MAX_TCP_SEGMENT_SIZE);
|
||||
|
||||
/*
|
||||
* If we are not using the quickstart service (thus we are an IBM
|
||||
* registered device), we need to provide user name and password
|
||||
*/
|
||||
if(strncasecmp(conf.org_id, QUICKSTART, strlen(conf.org_id)) != 0) {
|
||||
if(strlen(conf.auth_token) == 0) {
|
||||
printf("User name set, but empty auth token\n");
|
||||
state = STATE_ERROR;
|
||||
break;
|
||||
} else {
|
||||
mqtt_set_username_password(&conn, "use-token-auth",
|
||||
conf.auth_token);
|
||||
}
|
||||
}
|
||||
|
||||
/* _register() will set auto_reconnect. We don't want that. */
|
||||
conn.auto_reconnect = 0;
|
||||
connect_attempt = 1;
|
||||
|
||||
state = STATE_REGISTERED;
|
||||
DBG("Init\n");
|
||||
/* Continue */
|
||||
case STATE_REGISTERED:
|
||||
if(uip_ds6_get_global(ADDR_PREFERRED) != NULL) {
|
||||
/* Registered and with a public IP. Connect */
|
||||
DBG("Registered. Connect attempt %u\n", connect_attempt);
|
||||
ping_parent();
|
||||
connect_to_broker();
|
||||
} else {
|
||||
leds_on(STATUS_LED);
|
||||
ctimer_set(&ct, NO_NET_LED_DURATION, publish_led_off, NULL);
|
||||
}
|
||||
etimer_set(&publish_periodic_timer, NET_CONNECT_PERIODIC);
|
||||
return;
|
||||
break;
|
||||
case STATE_CONNECTING:
|
||||
leds_on(STATUS_LED);
|
||||
ctimer_set(&ct, CONNECTING_LED_DURATION, publish_led_off, NULL);
|
||||
/* Not connected yet. Wait */
|
||||
DBG("Connecting (%u)\n", connect_attempt);
|
||||
break;
|
||||
case STATE_CONNECTED:
|
||||
/* Don't subscribe unless we are a registered device */
|
||||
if(strncasecmp(conf.org_id, QUICKSTART, strlen(conf.org_id)) == 0) {
|
||||
DBG("Using 'quickstart': Skipping subscribe\n");
|
||||
state = STATE_PUBLISHING;
|
||||
}
|
||||
/* Continue */
|
||||
case STATE_PUBLISHING:
|
||||
/* If the timer expired, the connection is stable. */
|
||||
if(timer_expired(&connection_life)) {
|
||||
/*
|
||||
* Intentionally using 0 here instead of 1: We want RECONNECT_ATTEMPTS
|
||||
* attempts if we disconnect after a successful connect
|
||||
*/
|
||||
connect_attempt = 0;
|
||||
}
|
||||
|
||||
if(mqtt_ready(&conn) && conn.out_buffer_sent) {
|
||||
/* Connected. Publish */
|
||||
if(state == STATE_CONNECTED) {
|
||||
subscribe();
|
||||
state = STATE_PUBLISHING;
|
||||
} else {
|
||||
leds_on(STATUS_LED);
|
||||
ctimer_set(&ct, PUBLISH_LED_ON_DURATION, publish_led_off, NULL);
|
||||
publish();
|
||||
}
|
||||
etimer_set(&publish_periodic_timer, conf.pub_interval);
|
||||
|
||||
DBG("Publishing\n");
|
||||
/* Return here so we don't end up rescheduling the timer */
|
||||
return;
|
||||
} else {
|
||||
/*
|
||||
* Our publish timer fired, but some MQTT packet is already in flight
|
||||
* (either not sent at all, or sent but not fully ACKd).
|
||||
*
|
||||
* This can mean that we have lost connectivity to our broker or that
|
||||
* simply there is some network delay. In both cases, we refuse to
|
||||
* trigger a new message and we wait for TCP to either ACK the entire
|
||||
* packet after retries, or to timeout and notify us.
|
||||
*/
|
||||
DBG("Publishing... (MQTT state=%d, q=%u)\n", conn.state,
|
||||
conn.out_queue_full);
|
||||
}
|
||||
break;
|
||||
case STATE_DISCONNECTED:
|
||||
DBG("Disconnected\n");
|
||||
if(connect_attempt < RECONNECT_ATTEMPTS ||
|
||||
RECONNECT_ATTEMPTS == RETRY_FOREVER) {
|
||||
/* Disconnect and backoff */
|
||||
clock_time_t interval;
|
||||
mqtt_disconnect(&conn);
|
||||
connect_attempt++;
|
||||
|
||||
interval = connect_attempt < 3 ? RECONNECT_INTERVAL << connect_attempt :
|
||||
RECONNECT_INTERVAL << 3;
|
||||
|
||||
DBG("Disconnected. Attempt %u in %lu ticks\n", connect_attempt, interval);
|
||||
|
||||
etimer_set(&publish_periodic_timer, interval);
|
||||
|
||||
state = STATE_REGISTERED;
|
||||
return;
|
||||
} else {
|
||||
/* Max reconnect attempts reached. Enter error state */
|
||||
state = STATE_ERROR;
|
||||
DBG("Aborting connection after %u attempts\n", connect_attempt - 1);
|
||||
}
|
||||
break;
|
||||
case STATE_CONFIG_ERROR:
|
||||
/* Idle away. The only way out is a new config */
|
||||
printf("Bad configuration.\n");
|
||||
return;
|
||||
case STATE_ERROR:
|
||||
default:
|
||||
leds_on(STATUS_LED);
|
||||
/*
|
||||
* 'default' should never happen.
|
||||
*
|
||||
* If we enter here it's because of some error. Stop timers. The only thing
|
||||
* that can bring us out is a new config event
|
||||
*/
|
||||
printf("Default case: State=0x%02x\n", state);
|
||||
return;
|
||||
}
|
||||
|
||||
/* If we didn't return so far, reschedule ourselves */
|
||||
etimer_set(&publish_periodic_timer, STATE_MACHINE_PERIODIC);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
PROCESS_THREAD(mqtt_demo_process, ev, data)
|
||||
{
|
||||
|
||||
PROCESS_BEGIN();
|
||||
|
||||
printf("MQTT Demo Process\n");
|
||||
|
||||
if(init_config() != 1) {
|
||||
PROCESS_EXIT();
|
||||
}
|
||||
|
||||
update_config();
|
||||
|
||||
def_rt_rssi = 0x8000000;
|
||||
uip_icmp6_echo_reply_callback_add(&echo_reply_notification,
|
||||
echo_reply_handler);
|
||||
etimer_set(&echo_request_timer, conf.def_rt_ping_interval);
|
||||
|
||||
/* Main loop */
|
||||
while(1) {
|
||||
|
||||
PROCESS_YIELD();
|
||||
|
||||
if(ev == sensors_event && data == PUBLISH_TRIGGER) {
|
||||
if(state == STATE_ERROR) {
|
||||
connect_attempt = 1;
|
||||
state = STATE_REGISTERED;
|
||||
}
|
||||
}
|
||||
|
||||
if((ev == PROCESS_EVENT_TIMER && data == &publish_periodic_timer) ||
|
||||
ev == PROCESS_EVENT_POLL ||
|
||||
(ev == sensors_event && data == PUBLISH_TRIGGER)) {
|
||||
state_machine();
|
||||
}
|
||||
|
||||
if(ev == PROCESS_EVENT_TIMER && data == &echo_request_timer) {
|
||||
ping_parent();
|
||||
etimer_set(&echo_request_timer, conf.def_rt_ping_interval);
|
||||
}
|
||||
}
|
||||
|
||||
PROCESS_END();
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* @}
|
||||
* @}
|
||||
*/
|
52
examples/cc2538dk/mqtt-demo/project-conf.h
Normal file
52
examples/cc2538dk/mqtt-demo/project-conf.h
Normal file
|
@ -0,0 +1,52 @@
|
|||
/*
|
||||
* Copyright (c) 2012, Texas Instruments Incorporated - http://www.ti.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 copyright holder 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 COPYRIGHT HOLDERS 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
|
||||
* COPYRIGHT HOLDER 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.
|
||||
*/
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* \addtogroup cc2538-mqtt-demo
|
||||
* @{
|
||||
*
|
||||
* \file
|
||||
* Project specific configuration defines for the MQTT demo
|
||||
*/
|
||||
/*---------------------------------------------------------------------------*/
|
||||
#ifndef PROJECT_CONF_H_
|
||||
#define PROJECT_CONF_H_
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* User configuration */
|
||||
#define MQTT_DEMO_STATUS_LED LEDS_GREEN
|
||||
#define MQTT_DEMO_PUBLISH_TRIGGER &button_right_sensor
|
||||
|
||||
/* If undefined, the demo will attempt to connect to IBM's quickstart */
|
||||
#define MQTT_DEMO_BROKER_IP_ADDR "aaaa::1"
|
||||
/*---------------------------------------------------------------------------*/
|
||||
#endif /* PROJECT_CONF_H_ */
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/** @} */
|
|
@ -14,6 +14,7 @@ webserver-ipv6/cc2538dk \
|
|||
cc2538dk/cc2538dk \
|
||||
cc2538dk/udp-ipv6-echo-server/cc2538dk \
|
||||
cc2538dk/sniffer/cc2538dk \
|
||||
cc2538dk/mqtt-demo/cc2538dk \
|
||||
ipv6/multicast/econotag \
|
||||
ipv6/multicast/cc2538dk \
|
||||
|
||||
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Reference in a new issue