Version 1.0.0
Initial version.
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include/zh_network.h
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173
include/zh_network.h
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/**
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* @file
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* Header file for the zh_network component.
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*
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*/
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#pragma once
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#include "string.h"
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#include "esp_err.h"
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#include "esp_timer.h"
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#include "esp_wifi.h"
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#include "esp_now.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/event_groups.h"
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#include "esp_log.h"
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#include "esp_heap_caps.h"
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#include "zh_vector.h"
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#ifdef CONFIG_IDF_TARGET_ESP8266
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#include "esp_system.h"
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#else
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#include "esp_random.h"
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#include "esp_mac.h"
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#endif
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/**
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* @brief Unique identifier of ESP-NOW interface events base. Used when registering the event handler.
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*
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*/
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#define ESP_EVENT_BASE ZH_NETWORK
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/**
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* @brief Maximum value of the transmitted data size.
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*
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* @note Value range from 1 to 218. Smaller size - higher transmission speed.
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*
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* @attention All devices on the network must have the same ZH_NETWORK_MAX_MESSAGE_SIZE.
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*/
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#define ZH_NETWORK_MAX_MESSAGE_SIZE 218
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/**
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* @brief Default values for zh_network_init_config_t structure for initial initialization of ESP-NOW interface.
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*
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*/
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#define ZH_NETWORK_INIT_CONFIG_DEFAULT() \
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{ \
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.network_id = 0xFAFBFCFD, \
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.task_priority = 4, \
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.stack_size = 3072, \
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.queue_size = 32, \
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.max_waiting_time = 1000, \
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.id_vector_size = 100, \
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.route_vector_size = 100, \
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.wifi_interface = WIFI_IF_STA \
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}
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/**
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* @brief Structure for initial initialization of ESP-NOW interface.
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*
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* @note Before initialize ESP-NOW interface recommend initialize zh_network_init_config_t structure with default values.
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*
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* @code zh_network_init_config_t config = ZH_NETWORK_INIT_CONFIG_DEFAULT() @endcode
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*/
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typedef struct
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{
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uint32_t network_id; ///< A unique ID for the mesh network. @attention The ID must be the same for all nodes in the network.
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uint8_t task_priority; ///< Task priority for the ESP-NOW messages processing. @note It is not recommended to set a value less than 4.
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uint16_t stack_size; ///< Stack size for task for the ESP-NOW messages processing. @note The minimum size is 3072 bytes.
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uint8_t queue_size; ///< Queue size for task for the ESP-NOW messages processing. @note The size depends on the number of messages to be processed. It is not recommended to set the value less than 32.
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uint16_t max_waiting_time; ///< Maximum time to wait a response message from target node (in milliseconds). @note If a response message from the target node is not received within this time, the status of the sent message will be "sent fail".
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uint16_t id_vector_size; ///< Maximum size of unique ID of received messages. @note If the size is exceeded, the first value will be deleted. Minimum recommended value: number of planned nodes in the network + 10%.
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uint16_t route_vector_size; ///< The maximum size of the routing table. @note If the size is exceeded, the first route will be deleted. Minimum recommended value: number of planned nodes in the network + 10%.
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wifi_interface_t wifi_interface; ///< WiFi interface (STA or AP) used for ESP-NOW operation. @note The MAC address of the device depends on the selected WiFi interface.
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} zh_network_init_config_t;
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/// \cond
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ESP_EVENT_DECLARE_BASE(ESP_EVENT_BASE);
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/// \endcond
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/**
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* @brief Enumeration of possible ESP-NOW events.
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*
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*/
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typedef enum
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{
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ZH_NETWORK_ON_RECV_EVENT, ///< The event when the ESP-NOW message was received.
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ZH_NETWORK_ON_SEND_EVENT ///< The event when the ESP-NOW message was sent.
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} zh_network_event_type_t;
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/**
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* @brief Enumeration of possible status of sent ESP-NOW message.
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*
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*/
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typedef enum
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{
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ZH_NETWORK_SEND_SUCCESS, ///< If ESP-NOW message was sent success.
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ZH_NETWORK_SEND_FAIL ///< If ESP-NOW message was sent fail.
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} zh_network_on_send_event_type_t;
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/**
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* @brief Structure for sending data to the event handler when an ESP-NOW message was sent.
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*
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* @note Should be used with ZH_NETWORK event base and ZH_NETWORK_ON_SEND_EVENT event.
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*/
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typedef struct
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{
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uint8_t mac_addr[6]; ///< MAC address of the device to which the ESP-NOW message was sent. @note
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zh_network_on_send_event_type_t status; ///< Status of sent ESP-NOW message. @note
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} zh_network_event_on_send_t;
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/**
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* @brief Structure for sending data to the event handler when an ESP-NOW message was received.
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*
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* @note Should be used with ZH_NETWORK event base and ZH_NETWORK_ON_RECV_EVENT event.
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*/
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typedef struct
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{
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uint8_t mac_addr[6]; ///< MAC address of the sender ESP-NOW message. @note
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uint8_t *data; ///< Pointer to the data of the received ESP-NOW message. @note
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uint8_t data_len; ///< Size of the received ESP-NOW message. @note
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} zh_network_event_on_recv_t;
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/**
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* @brief Initialize ESP-NOW interface.
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*
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* @note Before initialize ESP-NOW interface recommend initialize zh_network_init_config_t structure with default values.
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*
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* @code zh_network_init_config_t config = ZH_NETWORK_INIT_CONFIG_DEFAULT() @endcode
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*
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* @param[in] config Pointer to ESP-NOW initialized configuration structure. Can point to a temporary variable.
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*
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* @return
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* - ESP_OK if initialization was success
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* - ESP_ERR_INVALID_ARG if parameter error
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* - ESP_ERR_WIFI_NOT_INIT if WiFi is not initialized
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* - ESP_FAIL if any internal error
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*/
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esp_err_t zh_network_init(zh_network_init_config_t *config);
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/**
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* @brief Deinitialize ESP-NOW interface.
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*
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* @return
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* - ESP_OK if deinitialization was success
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* - ESP_FAIL if ESP-NOW is not initialized
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*/
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esp_err_t zh_network_deinit(void);
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/**
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* @brief Send ESP-NOW data.
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*
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* @param[in] target Pointer to a buffer containing an eight-byte target MAC. Can be NULL for broadcast.
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* @param[in] data Pointer to a buffer containing the data for send.
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* @param[in] data_len Sending data length.
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*
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* @note The function will return an ESP_ERR_INVALID_STATE error if less than 50% of the size set at initialization remains in the message queue.
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*
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* @return
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* - ESP_OK if sent was success
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* - ESP_ERR_INVALID_ARG if parameter error
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* - ESP_ERR_INVALID_STATE if queue for outgoing data is almost full
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* - ESP_FAIL if ESP-NOW is not initialized
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*/
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esp_err_t zh_network_send(const uint8_t *target, const uint8_t *data, const uint8_t data_len);
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#ifdef __cplusplus
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}
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#endif
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