/*********************************************************************************
|
* Copyright: (C) 2019 LingYun IoT System Studio
|
* All rights reserved.
|
*
|
* Filename: main.c
|
* Description: This file is MQTT publisher/subscriber example program.
|
*
|
* Version: 1.0.0(29/01/19)
|
* Author: Guo Wenxue <guowenxue@gmail.com>
|
* ChangeLog: 1, Release initial version on "29/01/19 15:34:41"
|
*
|
********************************************************************************/
|
#include <stdio.h>
|
#include <stdlib.h>
|
#include <unistd.h>
|
#include <time.h>
|
#include <getopt.h>
|
#include <libgen.h>
|
#include <string.h>
|
#include <errno.h>
|
|
#include <mosquitto.h>
|
#include <cjson/cJSON.h>
|
|
#include "logger.h"
|
#include "proc.h"
|
#include "config.h"
|
#include "ds18b20.h"
|
#include "sht20.h"
|
#include "leds.h"
|
#include "relay.h"
|
|
#define PROG_VERSION "v1.0.0"
|
#define DAEMON_PIDFILE "/tmp/.iotd.pid"
|
|
void *mqtt_worker(void *args);
|
|
static void program_usage(char *progname)
|
{
|
printf("Usage: %s [OPTION]...\n", progname);
|
printf(" %s is LingYun studio iotd program running on RaspberryPi\n", progname);
|
|
printf("\nMandatory arguments to long options are mandatory for short options too:\n");
|
printf(" -b[daemon ] Running in daemon mode\n");
|
printf(" -d[debug ] Running in debug mode\n");
|
printf(" -c[conf ] Specify configure file\n");
|
printf(" -h[help ] Display this help information\n");
|
printf(" -v[version ] Display the program version\n");
|
|
printf("\n%s version %s\n", progname, PROG_VERSION);
|
return;
|
}
|
|
int main (int argc, char **argv)
|
{
|
int daemon = 0;
|
pthread_t tid;
|
iotd_ctx_t ctx;
|
char *conf_file="/etc/iotd.conf";
|
int debug = 0;
|
int opt;
|
char *progname=NULL;
|
|
struct option long_options[] = {
|
{"conf", required_argument, NULL, 'c'},
|
{"daemon", no_argument, NULL, 'b'},
|
{"debug", no_argument, NULL, 'd'},
|
{"version", no_argument, NULL, 'v'},
|
{"help", no_argument, NULL, 'h'},
|
{NULL, 0, NULL, 0}
|
};
|
|
progname = (char *)basename(argv[0]);
|
|
/* parser the command line parameters */
|
while ((opt = getopt_long(argc, argv, "c:bdvh", long_options, NULL)) != -1)
|
{
|
switch (opt)
|
{
|
case 'c': /* Set configure file */
|
conf_file = optarg;
|
break;
|
|
case 'b': /* Set daemon running */
|
daemon = 1;
|
break;
|
|
case 'd': /* Set debug running */
|
debug = 1;
|
break;
|
|
case 'v': /* Get software version */
|
printf("%s version %s\n", progname, PROG_VERSION);
|
return 0;
|
|
case 'h': /* Get help information */
|
program_usage(progname);
|
return 0;
|
|
default:
|
break;
|
}
|
}
|
|
/* parser configure file */
|
if( parser_conf(conf_file, &ctx, debug)<0 )
|
{
|
fprintf(stderr, "Parser iotd configure file failure\n");
|
return -2;
|
}
|
|
/* install signal proc handler */
|
install_default_signal();
|
|
/* check program already running or not, if already running then exit, or set running as daemon */
|
if( check_set_program_running(daemon, DAEMON_PIDFILE) < 0 )
|
goto cleanup;
|
|
/* initial mosquitto library */
|
mosquitto_lib_init();
|
|
/* start MQTT thread */
|
if( thread_start(&tid, mqtt_worker, &ctx.mqtt ) < 0 )
|
{
|
log_error("Start MQTT worker thread failure\n");
|
goto cleanup;
|
}
|
log_info("Start MQTT worker thread ok\n");
|
|
/* control thread loop */
|
while( !g_signal.stop )
|
{
|
sleep(1);
|
}
|
|
cleanup:
|
mosquitto_lib_cleanup();
|
log_close();
|
|
return 0;
|
}
|
|
|
/*
|
* +--------------------------------+
|
* | MQTT Thread worker |
|
* +--------------------------------+
|
*/
|
|
/* process publisher(uplink) data */
|
void pub_connect_callback(struct mosquitto *mosq, void *userdata, int result)
|
{
|
mqtt_ctx_t *mqtt = (mqtt_ctx_t *)userdata;
|
iotd_ctx_t *iotd = to_iotd(mqtt);
|
int rv = 0;
|
char msg[128];
|
float temp = 0.0; /* temperature */
|
float rh = 0.0; /* relative humidity */
|
int retain = 0;
|
static time_t last_time = 0;
|
|
/* publish time is not arrive */
|
if( !check_timeout(&last_time, mqtt->interval) )
|
return ;
|
|
log_debug("Publish topic '%s'\n", mqtt->pubTopic);
|
|
if( iotd->hwinfo.ds18b20 )
|
{
|
log_debug("DS18B20 temperature sensor enabled, start broadcast it\n");
|
if( ds18b20_get_temperature(&temp)<0 )
|
return ;
|
|
memset(msg, 0, sizeof(msg));
|
snprintf(msg, sizeof(msg), "{\"temperature\":%.2f}", temp);
|
rv = mosquitto_publish(mosq, NULL, mqtt->pubTopic, strlen(msg), msg, mqtt->pubQos, retain);
|
if( rv )
|
{
|
log_error("Publisher broadcast message '%s' failure: %d\n", msg, rv);
|
}
|
else
|
{
|
log_info("Publisher broadcast message '%s' ok\n", msg);
|
}
|
}
|
|
if( iotd->hwinfo.sht2x )
|
{
|
log_debug("SHT2X temperature and humidity sensor enabled, start broadcast it\n");
|
if( sht2x_get_temp_humidity(&temp, &rh)<0 )
|
return ;
|
|
memset(msg, 0, sizeof(msg));
|
snprintf(msg, sizeof(msg), "{\"temperature\":%.2f, \"humidity\":%.2f}", temp, rh);
|
rv = mosquitto_publish(mosq, NULL, mqtt->pubTopic, strlen(msg), msg, mqtt->pubQos, retain);
|
if( rv )
|
{
|
log_error("Publisher broadcast message '%s' failure: %d\n", msg, rv);
|
}
|
else
|
{
|
log_info("Publisher broadcast message '%s' ok\n", msg);
|
}
|
}
|
|
return ;
|
}
|
|
/* process subscriber(downlink) data */
|
void proc_json_items(cJSON *root, mqtt_ctx_t *mqtt)
|
{
|
iotd_ctx_t *iotd = to_iotd(mqtt);
|
cJSON *item;
|
char leds[LED_CNT][16] = {"RedLed", "GreenLed", "BlueLed"};
|
char relays[RELAY_CNT][16] = {"Relay"};
|
int which;
|
|
if( !root )
|
{
|
log_error("Invalid input arguments $root\n");
|
return ;
|
}
|
|
/* parser JSON command for relays */
|
if( iotd->hwinfo.relay )
|
{
|
for(which=0; which<RELAY_CNT; which++)
|
{
|
item = cJSON_GetObjectItem(root, relays[which]);
|
if( !item )
|
continue;
|
|
if( strcasecmp(item->valuestring, "on") )
|
turn_relay(which, ON);
|
else if( strcasecmp(item->valuestring, "off") )
|
turn_relay(which, OFF);
|
}
|
}
|
|
/* parser JSON command for RGB leds */
|
if( iotd->hwinfo.led )
|
{
|
for(which=0; which<LED_CNT; which++)
|
{
|
item = cJSON_GetObjectItem(root, leds[which]);
|
if( !item )
|
continue;
|
|
if( strcasecmp(item->valuestring, "on") )
|
turn_led(which, ON);
|
else if( strcasecmp(item->valuestring, "off") )
|
turn_led(which, OFF);
|
}
|
}
|
|
return ;
|
}
|
|
void sub_message_callback(struct mosquitto *mosq, void *userdata, const struct mosquitto_message *message)
|
{
|
mqtt_ctx_t *ctx = (mqtt_ctx_t *)userdata;
|
|
cJSON *root = NULL;
|
|
if ( !message->payloadlen )
|
{
|
log_error("%s (null)\n", message->topic);
|
return ;
|
}
|
|
log_info("Subscriber receive message: '%s'\n", message->payload);
|
|
root = cJSON_Parse(message->payload);
|
if( !root )
|
{
|
log_error("cJSON_Parse parser failure: %s\n", cJSON_GetErrorPtr());
|
return ;
|
}
|
|
/* process receive message data */
|
proc_json_items(root, ctx);
|
|
/* must delete it, or it will result memory leak */
|
cJSON_Delete(root);
|
|
return ;
|
}
|
|
void mqtt_connect_callback(struct mosquitto *mosq, void *userdata, int result)
|
{
|
mqtt_ctx_t *ctx = (mqtt_ctx_t *)userdata;
|
|
if( result )
|
{
|
log_error("mosquitto connect to broker server failed, rv=%d\n", result);
|
return ;
|
}
|
|
log_info("mosquitto connect to broker server[%s:%d] successfully\n", ctx->host, ctx->port);
|
mosquitto_subscribe(mosq, NULL, ctx->subTopic, ctx->subQos);
|
}
|
|
void mqtt_disconnect_callback(struct mosquitto *mosq, void *userdata, int result)
|
{
|
mqtt_ctx_t *ctx = (mqtt_ctx_t *)userdata;
|
|
log_warn("mosquitto disconnect to broker server[%s:%d], reason=%d\n", ctx->host, ctx->port, result);
|
}
|
|
void *mqtt_worker(void *args)
|
{
|
mqtt_ctx_t *ctx = (mqtt_ctx_t *)args;
|
struct mosquitto *mosq;
|
bool session = true;
|
int rv = 0;
|
|
mosq = mosquitto_new(ctx->devid, session, ctx);
|
if( !mosq )
|
{
|
log_error("mosquitto_new failure\n");
|
return NULL;
|
}
|
|
/* connnect to broker by token or uid/pwd */
|
if( strlen(ctx->token ) > 0)
|
{
|
log_info("Using token authentication: '%s'\n", ctx->token);
|
mosquitto_username_pw_set(mosq, ctx->token, NULL);
|
}
|
else if( strlen(ctx->uid)> 0 && strlen(ctx->pwd)> 0 )
|
{
|
log_info("Using username/password authentication\n");
|
mosquitto_username_pw_set(mosq, ctx->uid, ctx->pwd);
|
}
|
|
/* set callback functions */
|
mosquitto_connect_callback_set(mosq, mqtt_connect_callback);
|
mosquitto_disconnect_callback_set(mosq, mqtt_disconnect_callback);
|
mosquitto_message_callback_set(mosq, sub_message_callback);
|
|
while( !g_signal.stop )
|
{
|
/* connect to MQTT broker */
|
if( mosquitto_connect(mosq, ctx->host, ctx->port, ctx->keepalive) )
|
{
|
log_error("mosquitto connect to broker[%s:%d] failure: %s\n", ctx->host, ctx->port, strerror(errno));
|
sleep(1);
|
continue;
|
}
|
|
while(!g_signal.stop)
|
{
|
/* periodically publish and report data */
|
pub_connect_callback(mosq, ctx, MOSQ_ERR_SUCCESS);
|
|
/* MQTT process in Non-blocking mode, timeout for 1s */
|
if( MOSQ_ERR_SUCCESS != (rv = mosquitto_loop(mosq, 1000, 1)) )
|
{
|
log_warn("MQTT loop error: %s, reconnecting...\n", mosquitto_strerror(rv));
|
break;
|
}
|
}
|
|
mosquitto_disconnect(mosq);
|
sleep(1);
|
}
|
|
mosquitto_destroy(mosq);
|
return NULL;
|
}
|
