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esp_rmaker_mqtt.h
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esp_rmaker_mqtt.h
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// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
#include <stdint.h>
#include <esp_err.h>
#ifdef __cplusplus
extern "C"
{
#endif
/** ESP RainMaker MQTT Configuration */
typedef struct {
/** MQTT Host */
char *mqtt_host;
/** Client ID */
char *client_id;
/** Client Certificate in NULL terminate PEM format */
char *client_cert;
/** Client Key in NULL terminate PEM format */
char *client_key;
/** Server Certificate in NULL terminate PEM format */
char *server_cert;
} esp_rmaker_mqtt_config_t;
/** ESP RainMaker MQTT Subscribe callback prototype
*
* @param[in] topic Topic on which the message was received
* @param[in] payload Data received in the message
* @param[in] payload_len Length of the data
* @param[in] priv_data The private data passed during subscription
*/
typedef void (*esp_rmaker_mqtt_subscribe_cb_t) (const char *topic, void *payload, size_t payload_len, void *priv_data);
/** Initialize ESP RainMaker MQTT
*
* @param[in] config The MQTT configuration data
*
* @return ESP_OK on success.
* @return error in case of any error.
*/
esp_err_t esp_rmaker_mqtt_init(esp_rmaker_mqtt_config_t *config);
/** MQTT Connect
*
* Starts the connection attempts to the MQTT broker as per the configuration
* provided during initializing.
* This should ideally be called after successful network connection.
*
* @return ESP_OK on success.
* @return error in case of any error.
*/
esp_err_t esp_rmaker_mqtt_connect(void);
/** MQTT Disconnect
*
* Disconnects from the MQTT broker.
*
* @return ESP_OK on success.
* @return error in case of any error.
*/
esp_err_t esp_rmaker_mqtt_disconnect(void);
/** Publish MQTT Message
*
* @param[in] topic The MQTT topic on which the message should be published.
* @param[in] data Data to be published
* @param[in] data_len Length of the data
*
* @return ESP_OK on success.
* @return error in case of any error.
*/
esp_err_t esp_rmaker_mqtt_publish(const char *topic, void *data, size_t data_len);
/** Subscribe to MQTT topic
*
* @param[in] topic The topic to be subscribed to.
* @param[in] cb The callback to be invoked when a message is received on the given topic.
* @param[in] priv_data Optional private data to be passed to the callback
*
* @return ESP_OK on success.
* @return error in case of any error.
*/
esp_err_t esp_rmaker_mqtt_subscribe(const char *topic, esp_rmaker_mqtt_subscribe_cb_t cb, void *priv_data);
/** Unsubscribe from MQTT topic
*
* @param[in] topic Topic from which to unsubscribe.
*
* @return ESP_OK on success.
* @return error in case of any error.
*/
esp_err_t esp_rmaker_mqtt_unsubscribe(const char *topic);
#ifdef __cplusplus
}
#endif