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121 lines
3.8 KiB
121 lines
3.8 KiB
/*
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* myMqtt.c
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*
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* Created on: 25.11.2022
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* Author: jonas
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*/
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#include "myMqtt.h"
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include "esp_log.h"
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#include "mqtt_client.h"
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// Settings
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#define CONFIG_BROKER_URL "mqtt://10.180.254.80"
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// tag for logging with ESP_LOG
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static const char *TAG = "MY_MQTT";
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// declarations
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static void log_error_if_nonzero(const char *message, int error_code);
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static void mqtt_event_handler(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data);
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// variables
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esp_mqtt_client_handle_t client;
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bool MyMqtt_Init(void){
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esp_mqtt_client_config_t mqtt_cfg = {
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.uri = CONFIG_BROKER_URL,
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};
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client = esp_mqtt_client_init(&mqtt_cfg);
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/* The last argument may be used to pass data to the event handler, in this example mqtt_event_handler */
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esp_mqtt_client_register_event(client, ESP_EVENT_ANY_ID, mqtt_event_handler, NULL);
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esp_err_t mqtt_error = esp_mqtt_client_start(client);
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return mqtt_error == ESP_OK;
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}
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void MyMqtt_Deinit(void){
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client = NULL;
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}
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void MyMqtt_Publish(const char *topic, const char *data){
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int msg_id = esp_mqtt_client_publish(client, topic, data, 0, 1, 0);
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ESP_LOGI(TAG, "sent publish successful, msg_id=%d", msg_id);
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}
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void MyMqtt_Subscribe(const char *topic){
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int msg_id = esp_mqtt_client_subscribe(client, topic, 0);
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ESP_LOGI(TAG, "sent subscribe successful, msg_id=%d, success=%s", msg_id, msg_id==-1 ? "false" : "true");
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}
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/***********/
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/* HELPERS */
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/***********/
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static void log_error_if_nonzero(const char *message, int error_code)
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{
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if (error_code != 0) {
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ESP_LOGE(TAG, "Last error %s: 0x%x", message, error_code);
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}
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}
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/*
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* @brief Event handler registered to receive MQTT events
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*
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* This function is called by the MQTT client event loop.
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*
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* @param handler_args user data registered to the event.
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* @param base Event base for the handler(always MQTT Base in this example).
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* @param event_id The id for the received event.
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* @param event_data The data for the event, esp_mqtt_event_handle_t.
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*/
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static void mqtt_event_handler(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data)
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{
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ESP_LOGD(TAG, "Event dispatched from event loop base=%s, event_id=%d", base, event_id);
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esp_mqtt_event_handle_t event = event_data;
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// unused: esp_mqtt_client_handle_t client = event->client;
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switch ((esp_mqtt_event_id_t)event_id) {
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case MQTT_EVENT_CONNECTED:
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ESP_LOGI(TAG, "MQTT_EVENT_CONNECTED");
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break;
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case MQTT_EVENT_DISCONNECTED:
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ESP_LOGI(TAG, "MQTT_EVENT_DISCONNECTED");
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break;
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case MQTT_EVENT_SUBSCRIBED:
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ESP_LOGI(TAG, "MQTT_EVENT_SUBSCRIBED, msg_id=%d", event->msg_id);
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break;
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case MQTT_EVENT_UNSUBSCRIBED:
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ESP_LOGI(TAG, "MQTT_EVENT_UNSUBSCRIBED, msg_id=%d", event->msg_id);
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break;
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case MQTT_EVENT_PUBLISHED:
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ESP_LOGI(TAG, "MQTT_EVENT_PUBLISHED, msg_id=%d", event->msg_id);
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break;
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case MQTT_EVENT_DATA:
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ESP_LOGI(TAG, "MQTT_EVENT_DATA");
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printf("TOPIC=%.*s\r\n", event->topic_len, event->topic);
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printf("DATA=%.*s\r\n", event->data_len, event->data);
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break;
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case MQTT_EVENT_ERROR:
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ESP_LOGI(TAG, "MQTT_EVENT_ERROR");
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if (event->error_handle->error_type == MQTT_ERROR_TYPE_TCP_TRANSPORT) {
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log_error_if_nonzero("reported from esp-tls", event->error_handle->esp_tls_last_esp_err);
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log_error_if_nonzero("reported from tls stack", event->error_handle->esp_tls_stack_err);
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log_error_if_nonzero("captured as transport's socket errno", event->error_handle->esp_transport_sock_errno);
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ESP_LOGI(TAG, "Last errno string (%s)", strerror(event->error_handle->esp_transport_sock_errno));
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}
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break;
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default:
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ESP_LOGI(TAG, "Other event id:%d", event->event_id);
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break;
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}
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}
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