custom_outbox sample
Select one of the symbols to view example projects that use it.
 
Outline
#include <stdio.h>
#include <stdint.h>
#include <stddef.h>
#include <string.h>
#include "esp_system.h"
#include "nvs_flash.h"
#include "esp_event.h"
#include "esp_netif.h"
#include "protocol_examples_common.h"
#include "esp_log.h"
#include "mqtt_client.h"
TAG
log_error_if_nonzero(const char *, int)
mqtt_event_handler(void *, esp_event_base_t, int32_t, void *)
mqtt_app_start()
app_main()
Files
loading...
SourceVuESP-IDF Framework and Examplescustom_outbox samplemain/app_main.c
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
/* * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Unlicense OR CC0-1.0 *//* ... */ /* MQTT (over TCP) Example with custom outbox This example code is in the Public Domain (or CC0 licensed, at your option.) Unless required by applicable law or agreed to in writing, this software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *//* ... */ #include <stdio.h> #include <stdint.h> #include <stddef.h> #include <string.h> #include "esp_system.h" #include "nvs_flash.h" #include "esp_event.h" #include "esp_netif.h" #include "protocol_examples_common.h" #include "esp_log.h" #include "mqtt_client.h"11 includes static const char *TAG = "MQTT_EXAMPLE"; static void log_error_if_nonzero(const char *message, int error_code) { if (error_code != 0) { ESP_LOGE(TAG, "Last error %s: 0x%x", message, error_code); }{...} }{ ... } /* * @brief Event handler registered to receive MQTT events * * This function is called by the MQTT client event loop. * * @param handler_args user data registered to the event. * @param base Event base for the handler(always MQTT Base in this example). * @param event_id The id for the received event. * @param event_data The data for the event, esp_mqtt_event_handle_t. *//* ... */ static void mqtt_event_handler(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data) { ESP_LOGD(TAG, "Event dispatched from event loop base=%s, event_id=%" PRIi32 "", base, event_id); esp_mqtt_event_handle_t event = event_data; esp_mqtt_client_handle_t client = event->client; int msg_id; switch ((esp_mqtt_event_id_t)event_id) { case MQTT_EVENT_CONNECTED: ESP_LOGI(TAG, "MQTT_EVENT_CONNECTED"); msg_id = esp_mqtt_client_publish(client, "/topic/qos1", "data_3", 0, 1, 0); ESP_LOGI(TAG, "sent publish successful, msg_id=%d", msg_id); msg_id = esp_mqtt_client_subscribe(client, "/topic/qos0", 0); ESP_LOGI(TAG, "sent subscribe successful, msg_id=%d", msg_id); msg_id = esp_mqtt_client_subscribe(client, "/topic/qos1", 1); ESP_LOGI(TAG, "sent subscribe successful, msg_id=%d", msg_id); break;... case MQTT_EVENT_DISCONNECTED: ESP_LOGI(TAG, "MQTT_EVENT_DISCONNECTED"); break; ... case MQTT_EVENT_SUBSCRIBED: ESP_LOGI(TAG, "MQTT_EVENT_SUBSCRIBED, msg_id=%d", event->msg_id); msg_id = esp_mqtt_client_publish(client, "/topic/qos0", "data", 0, 0, 0); ESP_LOGI(TAG, "sent publish successful, msg_id=%d", msg_id); break;... case MQTT_EVENT_UNSUBSCRIBED: ESP_LOGI(TAG, "MQTT_EVENT_UNSUBSCRIBED, msg_id=%d", event->msg_id); break;... case MQTT_EVENT_PUBLISHED: ESP_LOGI(TAG, "MQTT_EVENT_PUBLISHED, msg_id=%d", event->msg_id); break;... case MQTT_EVENT_DATA: ESP_LOGI(TAG, "MQTT_EVENT_DATA"); printf("TOPIC=%.*s\r\n", event->topic_len, event->topic); printf("DATA=%.*s\r\n", event->data_len, event->data); break;... case MQTT_EVENT_ERROR: ESP_LOGI(TAG, "MQTT_EVENT_ERROR"); if (event->error_handle->error_type == MQTT_ERROR_TYPE_TCP_TRANSPORT) { log_error_if_nonzero("reported from esp-tls", event->error_handle->esp_tls_last_esp_err); log_error_if_nonzero("reported from tls stack", event->error_handle->esp_tls_stack_err); log_error_if_nonzero("captured as transport's socket errno", event->error_handle->esp_transport_sock_errno); ESP_LOGI(TAG, "Last errno string (%s)", strerror(event->error_handle->esp_transport_sock_errno)); }{...} break;... default: ESP_LOGI(TAG, "Other event id:%d", event->event_id); break;... }{...} }{ ... } static void mqtt_app_start(void) { esp_mqtt_client_config_t mqtt_cfg = { .broker.address.uri = CONFIG_BROKER_URL, }{...}; #if CONFIG_BROKER_URL_FROM_STDIN char line[128]; if (strcmp(mqtt_cfg.broker.address.uri, "FROM_STDIN") == 0) { int count = 0; printf("Please enter url of mqtt broker\n"); while (count < 128) { int c = fgetc(stdin); if (c == '\n') { line[count] = '\0'; break; }{...} else if (c > 0 && c < 127) { line[count] = c; ++count; }{...} vTaskDelay(10 / portTICK_PERIOD_MS); }{...} mqtt_cfg.broker.address.uri = line; printf("Broker url: %s\n", line); }{...} else { ESP_LOGE(TAG, "Configuration mismatch: wrong broker url"); abort(); }{...} #endif/* ... */ /* CONFIG_BROKER_URL_FROM_STDIN */ esp_mqtt_client_handle_t client = esp_mqtt_client_init(&mqtt_cfg); /* The last argument may be used to pass data to the event handler, in this example mqtt_event_handler */ esp_mqtt_client_register_event(client, ESP_EVENT_ANY_ID, mqtt_event_handler, NULL); /*Let's enqueue a few messages to the outbox to see the allocations*/ int msg_id; msg_id = esp_mqtt_client_enqueue(client, "/topic/qos1", "data_3", 0, 1, 0, true); ESP_LOGI(TAG, "Enqueued msg_id=%d", msg_id); msg_id = esp_mqtt_client_enqueue(client, "/topic/qos2", "QoS2 message", 0, 2, 0, true); ESP_LOGI(TAG, "Enqueued msg_id=%d", msg_id); /* Now we start the client and it's possible to see the memory usage for the operations in the outbox. */ esp_mqtt_client_start(client); }{ ... } void app_main(void) { ESP_LOGI(TAG, "[APP] Startup.."); ESP_LOGI(TAG, "[APP] Free memory: %" PRIu32 " bytes", esp_get_free_heap_size()); ESP_LOGI(TAG, "[APP] IDF version: %s", esp_get_idf_version()); esp_log_level_set("*", ESP_LOG_INFO); esp_log_level_set("mqtt_client", ESP_LOG_VERBOSE); esp_log_level_set("MQTT_EXAMPLE", ESP_LOG_VERBOSE); esp_log_level_set("TRANSPORT_BASE", ESP_LOG_VERBOSE); esp_log_level_set("esp-tls", ESP_LOG_VERBOSE); esp_log_level_set("TRANSPORT", ESP_LOG_VERBOSE); esp_log_level_set("custom_outbox", ESP_LOG_VERBOSE); ESP_ERROR_CHECK(nvs_flash_init()); ESP_ERROR_CHECK(esp_netif_init()); ESP_ERROR_CHECK(esp_event_loop_create_default()); /* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig. * Read "Establishing Wi-Fi or Ethernet Connection" section in * examples/protocols/README.md for more information about this function. *//* ... */ ESP_ERROR_CHECK(example_connect()); mqtt_app_start(); }{ ... }
Details
Show:
from
Types: Columns:
This file uses the notable symbols shown below. Click anywhere in the file to view more details.