ESP32-C3 学习测试 蓝牙 篇（六、添加 Service）
作者：矜辰所致
- 2022 年 10 月 04 日 江苏
本文字数：15857 字
阅读完需：约 52 分钟
学会了添加 characteristic ，还得学会添加 service，本文来学习新增蓝牙服务。复制代码
前言
在上一篇文章，我们使用 ESP-IDF 的示例框架，很方便的就添加好了新的特征值（characteristic ），我们说过，就是开发 service 和 characteristic，所以我们还需要学会添加自己的 Service 。
本文目的明确：添加一个 Service 。
ESP32-C3 学习 蓝牙 篇系列博文连接：
自己画一块 ESP32-C3 的开发板（第一次使用立创 EDA）（PCB 到手）
https://xie.infoq.cn/article/30387388381a0d915b2494f91
开发环境是乐鑫官方的 ESP-IDF， 基于 VScode 插件搭建好的：
ESP32-C3 VScode 开发环境搭建（基于乐鑫官方 ESP-IDF——Windows 和 Ubuntu 双环境）
https://xie.infoq.cn/article/5b639e112cabba00cc1b8941a
蓝牙篇系列相关博文：
ESP32-C3 学习测试 蓝牙 篇（一、认识 ESP-IDF 的蓝牙框架、简单的了解蓝牙协议栈）
https://xie.infoq.cn/article/efbe5651b35c9d54c69bc0ab2
ESP32-C3 学习测试 蓝牙 篇（二、蓝牙调试 APP、开发板手机连接初体验）
https://xie.infoq.cn/article/a422913b3b0420b1ae7c1436d
ESP32-C3 学习测试 蓝牙 篇（三、认识蓝牙 GATT 协议）
https://xie.infoq.cn/article/9c35d44a61bf2f11aa0e5c407
ESP32-C3 学习测试 蓝牙 篇（四、GATT Server 示例解析）
https://xie.infoq.cn/article/743c10571e00b2e895cecb5d1
ESP32-C3 学习测试 蓝牙 篇（五、添加 characteristic）
一、添加一个 Service
相对于 characteristic 来说，service 会复杂一点，但是在乐鑫官方论坛直接已经有乐鑫的工程师给过示例，所以大家都可以参考示例来进行，防止链接失效，在本文最后直接把示例代码给贴出来了，示例链接：
因为有示例（示例在文末），照着这个来就没问题。
在我自己测试的时候，我是比示例多创建了一个 characteristic ，而且其中有一个带通知的 characteristic，比示例中添加的地方多一点，我把需要修改的地方总结记录一下，如果后续再应用的时候需要用到什么特别的再说。
1.1 新 service 头文件枚举定义
1.2 新 service 的一些定义
1.3 新 service 的属性表
1.4 新 service 的通知
1.5 ☆新 service 的创建☆
新 service 的创建操作是在 gatts_profile_event_handler 回调函数中使用一个标志位通过判断实现的：
到这里，新的 service 添加程序就修改完成，根据例程和我们前面文章的学习这没什么难度，但是实际上我测试也用了一些时间。
要细心！拷贝代码，修改代码要细心！ = =！
二、测试
上面的程序修改完成以后，测试就简单了：
上图可以看到，在我们之前的基础上，我们多了一个 Service， 根据我们的程序 Service 中有 2 个 characteristic ，characteristic 的属性与程序设置的一致， 通知的读取也正常。
其他的一些读写操作可以根据前面几篇文章自己测试，我测试过一切正常。
结语
本文成功添加了一个 Service，我们没有深入分析原理，所以没什么难度，根据示例框架来即可。
磨磨唧唧花了这么多篇文章，好歹也把蓝牙玩起来了，但是到目前为止，我们还没有结合开发板上面的一些其他设备做蓝牙的使用。
我们还没有实现我们使用蓝牙的第一个小目标：
通过蓝牙通讯，把传感器的数据发送给手机，然后手机也可以控制开发板上的 LED 灯。
但是有了这几篇文章的基础，我们接下来就要实现我们的这个小目标，做一个简单的应用。<3
应用完善程度取决于博主到时候测试使用的情况，如果顺利肯定完善点，不顺利就……⁄(⁄ ⁄•⁄ω⁄•⁄ ⁄)⁄ 大家多多理解……
本文就到这里，谢谢大家，最后附上官方论坛的示例源码：
附录（源码）
gatts_table_creat_demo.c:
/* 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.*/
/****************************************************************************** This demo showcases creating a GATT database using a predefined attribute table.* It acts as a GATT server and can send adv data, be connected by client.* Run the gatt_client demo, the client demo will automatically connect to the gatt_server_service_table demo.* Client demo will enable GATT server's notify after connection. The two devices will then exchange* data.*****************************************************************************/
#include "freertos/FreeRTOS.h"#include "freertos/task.h"#include "freertos/event_groups.h"#include "esp_system.h"#include "esp_log.h"#include "nvs_flash.h"#include "esp_bt.h"
#include "esp_gap_ble_api.h"#include "esp_gatts_api.h"#include "esp_bt_main.h"#include "gatts_table_creat_demo.h"#include "esp_gatt_common_api.h"
#define GATTS_TABLE_TAG "GATTS_TABLE_DEMO"
#define PROFILE_NUM 1#define PROFILE_APP_IDX 0#define ESP_APP_ID 0x55#define SAMPLE_DEVICE_NAME "ESP_GATTS_DEMO"#define SVC_INST_ID 0#define SVC_INST_ID1 1
/* The max length of characteristic value. When the GATT client performs a write or prepare write operation,* the data length must be less than GATTS_DEMO_CHAR_VAL_LEN_MAX.*/#define GATTS_DEMO_CHAR_VAL_LEN_MAX 500#define PREPARE_BUF_MAX_SIZE 1024#define CHAR_DECLARATION_SIZE (sizeof(uint8_t))
#define ADV_CONFIG_FLAG (1 << 0)#define SCAN_RSP_CONFIG_FLAG (1 << 1)
static uint8_t adv_config_done = 0;
uint16_t heart_rate_handle_table[HRS_IDX_NB];uint16_t heart_rate_handle_table2[HRS_IDX_NB2];
typedef struct { uint8_t *prepare_buf; int prepare_len;} prepare_type_env_t;
static prepare_type_env_t prepare_write_env;
#define CONFIG_SET_RAW_ADV_DATA#ifdef CONFIG_SET_RAW_ADV_DATAstatic uint8_t raw_adv_data[] = { /* flags */ 0x02, 0x01, 0x06, /* tx power*/ 0x02, 0x0a, 0xeb, /* service uuid */ 0x03, 0x03, 0xFF, 0x00, /* device name */ 0x0f, 0x09, 'E', 'S', 'P', '_', 'G', 'A', 'T', 'T', 'S', '_', 'D','E', 'M', 'P'};static uint8_t raw_scan_rsp_data[] = { /* flags */ 0x02, 0x01, 0x06, /* tx power */ 0x02, 0x0a, 0xeb, /* service uuid */ 0x03, 0x03, 0xFF,0x00};
#elsestatic uint8_t service_uuid[16] = { /* LSB <--------------------------------------------------------------------------------> MSB */ //first uuid, 16bit, [12],[13] is the value 0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80, 0x00, 0x10, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00,};
/* The length of adv data must be less than 31 bytes */static esp_ble_adv_data_t adv_data = { .set_scan_rsp = false, .include_name = true, .include_txpower = true, .min_interval = 0x0006, //slave connection min interval, Time = min_interval * 1.25 msec .max_interval = 0x0010, //slave connection max interval, Time = max_interval * 1.25 msec .appearance = 0x00, .manufacturer_len = 0, //TEST_MANUFACTURER_DATA_LEN, .p_manufacturer_data = NULL, //test_manufacturer, .service_data_len = 0, .p_service_data = NULL, .service_uuid_len = sizeof(service_uuid), .p_service_uuid = service_uuid, .flag = (ESP_BLE_ADV_FLAG_GEN_DISC | ESP_BLE_ADV_FLAG_BREDR_NOT_SPT),};
// scan response datastatic esp_ble_adv_data_t scan_rsp_data = { .set_scan_rsp = true, .include_name = true, .include_txpower = true, .min_interval = 0x0006, .max_interval = 0x0010, .appearance = 0x00, .manufacturer_len = 0, //TEST_MANUFACTURER_DATA_LEN, .p_manufacturer_data = NULL, //&test_manufacturer[0], .service_data_len = 0, .p_service_data = NULL, .service_uuid_len = sizeof(service_uuid), .p_service_uuid = service_uuid, .flag = (ESP_BLE_ADV_FLAG_GEN_DISC | ESP_BLE_ADV_FLAG_BREDR_NOT_SPT),};#endif /* CONFIG_SET_RAW_ADV_DATA */
static esp_ble_adv_params_t adv_params = { .adv_int_min = 0x20, .adv_int_max = 0x40, .adv_type = ADV_TYPE_IND, .own_addr_type = BLE_ADDR_TYPE_PUBLIC, .channel_map = ADV_CHNL_ALL, .adv_filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY,};
struct gatts_profile_inst { esp_gatts_cb_t gatts_cb; uint16_t gatts_if; uint16_t app_id; uint16_t conn_id; uint16_t service_handle; esp_gatt_srvc_id_t service_id; uint16_t char_handle; esp_bt_uuid_t char_uuid; esp_gatt_perm_t perm; esp_gatt_char_prop_t property; uint16_t descr_handle; esp_bt_uuid_t descr_uuid;};
static void gatts_profile_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param);
/* One gatt-based profile one app_id and one gatts_if, this array will store the gatts_if returned by ESP_GATTS_REG_EVT */static struct gatts_profile_inst heart_rate_profile_tab[PROFILE_NUM] = { [PROFILE_APP_IDX] = { .gatts_cb = gatts_profile_event_handler, .gatts_if = ESP_GATT_IF_NONE, /* Not get the gatt_if, so initial is ESP_GATT_IF_NONE */ },};
/* Service */static const uint16_t GATTS_SERVICE_UUID_TEST = 0x00FF;static const uint16_t GATTS_CHAR_UUID_TEST_A = 0xFF01;static const uint16_t GATTS_CHAR_UUID_TEST_B = 0xFF02;static const uint16_t GATTS_CHAR_UUID_TEST_C = 0xFF03;
static const uint16_t GATTS_SERVICE_UUID_TEST2 = 0x00EE;static const uint16_t GATTS_CHAR_UUID_TEST_A2 = 0xEE01;
static const uint16_t primary_service_uuid = ESP_GATT_UUID_PRI_SERVICE;static const uint16_t character_declaration_uuid = ESP_GATT_UUID_CHAR_DECLARE;static const uint16_t character_client_config_uuid = ESP_GATT_UUID_CHAR_CLIENT_CONFIG;static const uint8_t char_prop_read = ESP_GATT_CHAR_PROP_BIT_READ;static const uint8_t char_prop_write = ESP_GATT_CHAR_PROP_BIT_WRITE;static const uint8_t char_prop_read_write_notify = ESP_GATT_CHAR_PROP_BIT_WRITE | ESP_GATT_CHAR_PROP_BIT_READ | ESP_GATT_CHAR_PROP_BIT_NOTIFY;static const uint8_t char_prop_read_write = ESP_GATT_CHAR_PROP_BIT_WRITE | ESP_GATT_CHAR_PROP_BIT_READ;static const uint8_t heart_measurement_ccc[2] = {0x00, 0x00};static const uint8_t char_value[4] = {0x11, 0x22, 0x33, 0x44};
/* Full Database Description - Used to add attributes into the database */static const esp_gatts_attr_db_t gatt_db[HRS_IDX_NB] ={ // Service Declaration [IDX_SVC] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&primary_service_uuid, ESP_GATT_PERM_READ, sizeof(uint16_t), sizeof(GATTS_SERVICE_UUID_TEST), (uint8_t *)&GATTS_SERVICE_UUID_TEST}},
/* Characteristic Declaration */ [IDX_CHAR_A] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&character_declaration_uuid, ESP_GATT_PERM_READ, CHAR_DECLARATION_SIZE, CHAR_DECLARATION_SIZE, (uint8_t *)&char_prop_read_write_notify}},
/* Characteristic Value */ [IDX_CHAR_VAL_A] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&GATTS_CHAR_UUID_TEST_A, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, GATTS_DEMO_CHAR_VAL_LEN_MAX, sizeof(char_value), (uint8_t *)char_value}},
/* Client Characteristic Configuration Descriptor */ [IDX_CHAR_CFG_A] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&character_client_config_uuid, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, sizeof(uint16_t), sizeof(heart_measurement_ccc), (uint8_t *)heart_measurement_ccc}},
/* Characteristic Declaration */ [IDX_CHAR_B] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&character_declaration_uuid, ESP_GATT_PERM_READ, CHAR_DECLARATION_SIZE, CHAR_DECLARATION_SIZE, (uint8_t *)&char_prop_read}},
/* Characteristic Value */ [IDX_CHAR_VAL_B] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&GATTS_CHAR_UUID_TEST_B, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, GATTS_DEMO_CHAR_VAL_LEN_MAX, sizeof(char_value), (uint8_t *)char_value}},
/* Characteristic Declaration */ [IDX_CHAR_C] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&character_declaration_uuid, ESP_GATT_PERM_READ, CHAR_DECLARATION_SIZE, CHAR_DECLARATION_SIZE, (uint8_t *)&char_prop_write}},
/* Characteristic Value */ [IDX_CHAR_VAL_C] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&GATTS_CHAR_UUID_TEST_C, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, GATTS_DEMO_CHAR_VAL_LEN_MAX, sizeof(char_value), (uint8_t *)char_value}}, /* Characteristic Declaration */ [IDX_CHAR_D] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&character_declaration_uuid, ESP_GATT_PERM_READ, CHAR_DECLARATION_SIZE, CHAR_DECLARATION_SIZE, (uint8_t *)&char_prop_write}},
/* Characteristic Value */ [IDX_CHAR_VAL_D] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&GATTS_CHAR_UUID_TEST_C, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, GATTS_DEMO_CHAR_VAL_LEN_MAX, sizeof(char_value), (uint8_t *)char_value}}};
static const esp_gatts_attr_db_t gatt_db2[HRS_IDX_NB2] ={ // Service Declaration2 [IDX_SVC2] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&primary_service_uuid, ESP_GATT_PERM_READ, sizeof(uint16_t), sizeof(GATTS_SERVICE_UUID_TEST2), (uint8_t *)&GATTS_SERVICE_UUID_TEST2}},
/* Characteristic Declaration */ [IDX_CHAR_A2] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&character_declaration_uuid, ESP_GATT_PERM_READ, CHAR_DECLARATION_SIZE, CHAR_DECLARATION_SIZE, (uint8_t *)&char_prop_read_write}},
/* Characteristic Value */ [IDX_CHAR_VAL_A2] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&GATTS_CHAR_UUID_TEST_A2, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, GATTS_DEMO_CHAR_VAL_LEN_MAX, sizeof(char_value), (uint8_t *)char_value}}};
static void gap_event_handler(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *param){ switch (event) { #ifdef CONFIG_SET_RAW_ADV_DATA case ESP_GAP_BLE_ADV_DATA_RAW_SET_COMPLETE_EVT: adv_config_done &= (~ADV_CONFIG_FLAG); if (adv_config_done == 0){ esp_ble_gap_start_advertising(&adv_params); } break; case ESP_GAP_BLE_SCAN_RSP_DATA_RAW_SET_COMPLETE_EVT: adv_config_done &= (~SCAN_RSP_CONFIG_FLAG); if (adv_config_done == 0){ esp_ble_gap_start_advertising(&adv_params); } break; #else case ESP_GAP_BLE_ADV_DATA_SET_COMPLETE_EVT: adv_config_done &= (~ADV_CONFIG_FLAG); if (adv_config_done == 0){ esp_ble_gap_start_advertising(&adv_params); } break; case ESP_GAP_BLE_SCAN_RSP_DATA_SET_COMPLETE_EVT: adv_config_done &= (~SCAN_RSP_CONFIG_FLAG); if (adv_config_done == 0){ esp_ble_gap_start_advertising(&adv_params); } break; #endif case ESP_GAP_BLE_ADV_START_COMPLETE_EVT: /* advertising start complete event to indicate advertising start successfully or failed */ if (param->adv_start_cmpl.status != ESP_BT_STATUS_SUCCESS) { ESP_LOGE(GATTS_TABLE_TAG, "advertising start failed"); }else{ ESP_LOGI(GATTS_TABLE_TAG, "advertising start successfully"); } break; case ESP_GAP_BLE_ADV_STOP_COMPLETE_EVT: if (param->adv_stop_cmpl.status != ESP_BT_STATUS_SUCCESS) { ESP_LOGE(GATTS_TABLE_TAG, "Advertising stop failed"); } else { ESP_LOGI(GATTS_TABLE_TAG, "Stop adv successfully\n"); } break; case ESP_GAP_BLE_UPDATE_CONN_PARAMS_EVT: ESP_LOGI(GATTS_TABLE_TAG, "update connection params status = %d, min_int = %d, max_int = %d,conn_int = %d,latency = %d, timeout = %d", param->update_conn_params.status, param->update_conn_params.min_int, param->update_conn_params.max_int, param->update_conn_params.conn_int, param->update_conn_params.latency, param->update_conn_params.timeout); break; default: break; }}
void example_prepare_write_event_env(esp_gatt_if_t gatts_if, prepare_type_env_t *prepare_write_env, esp_ble_gatts_cb_param_t *param){ ESP_LOGI(GATTS_TABLE_TAG, "prepare write, handle = %d, value len = %d", param->write.handle, param->write.len); esp_gatt_status_t status = ESP_GATT_OK; if (prepare_write_env->prepare_buf == NULL) { prepare_write_env->prepare_buf = (uint8_t *)malloc(PREPARE_BUF_MAX_SIZE * sizeof(uint8_t)); prepare_write_env->prepare_len = 0; if (prepare_write_env->prepare_buf == NULL) { ESP_LOGE(GATTS_TABLE_TAG, "%s, Gatt_server prep no mem", __func__); status = ESP_GATT_NO_RESOURCES; } } else { if(param->write.offset > PREPARE_BUF_MAX_SIZE) { status = ESP_GATT_INVALID_OFFSET; } else if ((param->write.offset + param->write.len) > PREPARE_BUF_MAX_SIZE) { status = ESP_GATT_INVALID_ATTR_LEN; } } /*send response when param->write.need_rsp is true */ if (param->write.need_rsp){ esp_gatt_rsp_t *gatt_rsp = (esp_gatt_rsp_t *)malloc(sizeof(esp_gatt_rsp_t)); if (gatt_rsp != NULL){ gatt_rsp->attr_value.len = param->write.len; gatt_rsp->attr_value.handle = param->write.handle; gatt_rsp->attr_value.offset = param->write.offset; gatt_rsp->attr_value.auth_req = ESP_GATT_AUTH_REQ_NONE; memcpy(gatt_rsp->attr_value.value, param->write.value, param->write.len); esp_err_t response_err = esp_ble_gatts_send_response(gatts_if, param->write.conn_id, param->write.trans_id, status, gatt_rsp); if (response_err != ESP_OK){ ESP_LOGE(GATTS_TABLE_TAG, "Send response error"); } free(gatt_rsp); }else{ ESP_LOGE(GATTS_TABLE_TAG, "%s, malloc failed", __func__); } } if (status != ESP_GATT_OK){ return; } memcpy(prepare_write_env->prepare_buf + param->write.offset, param->write.value, param->write.len); prepare_write_env->prepare_len += param->write.len;
}
void example_exec_write_event_env(prepare_type_env_t *prepare_write_env, esp_ble_gatts_cb_param_t *param){ if (param->exec_write.exec_write_flag == ESP_GATT_PREP_WRITE_EXEC && prepare_write_env->prepare_buf){ esp_log_buffer_hex(GATTS_TABLE_TAG, prepare_write_env->prepare_buf, prepare_write_env->prepare_len); }else{ ESP_LOGI(GATTS_TABLE_TAG,"ESP_GATT_PREP_WRITE_CANCEL"); } if (prepare_write_env->prepare_buf) { free(prepare_write_env->prepare_buf); prepare_write_env->prepare_buf = NULL; } prepare_write_env->prepare_len = 0;}
bool create_tab1 = false;
static void gatts_profile_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param){ switch (event) { case ESP_GATTS_REG_EVT:{ esp_err_t set_dev_name_ret = esp_ble_gap_set_device_name(SAMPLE_DEVICE_NAME); if (set_dev_name_ret){ ESP_LOGE(GATTS_TABLE_TAG, "set device name failed, error code = %x", set_dev_name_ret); } #ifdef CONFIG_SET_RAW_ADV_DATA esp_err_t raw_adv_ret = esp_ble_gap_config_adv_data_raw(raw_adv_data, sizeof(raw_adv_data)); if (raw_adv_ret){ ESP_LOGE(GATTS_TABLE_TAG, "config raw adv data failed, error code = %x ", raw_adv_ret); } adv_config_done |= ADV_CONFIG_FLAG; esp_err_t raw_scan_ret = esp_ble_gap_config_scan_rsp_data_raw(raw_scan_rsp_data, sizeof(raw_scan_rsp_data)); if (raw_scan_ret){ ESP_LOGE(GATTS_TABLE_TAG, "config raw scan rsp data failed, error code = %x", raw_scan_ret); } adv_config_done |= SCAN_RSP_CONFIG_FLAG; #else //config adv data esp_err_t ret = esp_ble_gap_config_adv_data(&adv_data); if (ret){ ESP_LOGE(GATTS_TABLE_TAG, "config adv data failed, error code = %x", ret); } adv_config_done |= ADV_CONFIG_FLAG; //config scan response data ret = esp_ble_gap_config_adv_data(&scan_rsp_data); if (ret){ ESP_LOGE(GATTS_TABLE_TAG, "config scan response data failed, error code = %x", ret); } adv_config_done |= SCAN_RSP_CONFIG_FLAG; #endif esp_err_t create_attr_ret = esp_ble_gatts_create_attr_tab(gatt_db, gatts_if, HRS_IDX_NB, SVC_INST_ID); if (create_attr_ret){ ESP_LOGE(GATTS_TABLE_TAG, "create attr table failed, error code = %x", create_attr_ret); } } break; case ESP_GATTS_READ_EVT: ESP_LOGI(GATTS_TABLE_TAG, "ESP_GATTS_READ_EVT"); break; case ESP_GATTS_WRITE_EVT: if (!param->write.is_prep){ // the data length of gattc write must be less than GATTS_DEMO_CHAR_VAL_LEN_MAX. ESP_LOGI(GATTS_TABLE_TAG, "GATT_WRITE_EVT, handle = %d, value len = %d, value :", param->write.handle, param->write.len); esp_log_buffer_hex(GATTS_TABLE_TAG, param->write.value, param->write.len); if (heart_rate_handle_table[IDX_CHAR_CFG_A] == param->write.handle && param->write.len == 2){ uint16_t descr_value = param->write.value[1]<<8 | param->write.value[0]; if (descr_value == 0x0001){ ESP_LOGI(GATTS_TABLE_TAG, "notify enable"); uint8_t notify_data[15]; for (int i = 0; i < sizeof(notify_data); ++i) { notify_data[i] = i % 0xff; } //the size of notify_data[] need less than MTU size esp_ble_gatts_send_indicate(gatts_if, param->write.conn_id, heart_rate_handle_table[IDX_CHAR_VAL_A], sizeof(notify_data), notify_data, false); }else if (descr_value == 0x0002){ ESP_LOGI(GATTS_TABLE_TAG, "indicate enable"); uint8_t indicate_data[15]; for (int i = 0; i < sizeof(indicate_data); ++i) { indicate_data[i] = i % 0xff; } //the size of indicate_data[] need less than MTU size esp_ble_gatts_send_indicate(gatts_if, param->write.conn_id, heart_rate_handle_table[IDX_CHAR_VAL_A], sizeof(indicate_data), indicate_data, true); } else if (descr_value == 0x0000){ ESP_LOGI(GATTS_TABLE_TAG, "notify/indicate disable "); }else{ ESP_LOGE(GATTS_TABLE_TAG, "unknown descr value"); esp_log_buffer_hex(GATTS_TABLE_TAG, param->write.value, param->write.len); }
} /* send response when param->write.need_rsp is true*/ if (param->write.need_rsp){ esp_ble_gatts_send_response(gatts_if, param->write.conn_id, param->write.trans_id, ESP_GATT_OK, NULL); } }else{ /* handle prepare write */ example_prepare_write_event_env(gatts_if, &prepare_write_env, param); } break; case ESP_GATTS_EXEC_WRITE_EVT: // the length of gattc prepare write data must be less than GATTS_DEMO_CHAR_VAL_LEN_MAX. ESP_LOGI(GATTS_TABLE_TAG, "ESP_GATTS_EXEC_WRITE_EVT"); example_exec_write_event_env(&prepare_write_env, param); break; case ESP_GATTS_MTU_EVT: ESP_LOGI(GATTS_TABLE_TAG, "ESP_GATTS_MTU_EVT, MTU %d", param->mtu.mtu); break; case ESP_GATTS_CONF_EVT: ESP_LOGI(GATTS_TABLE_TAG, "ESP_GATTS_CONF_EVT, status = %d, attr_handle %d", param->conf.status, param->conf.handle); break; case ESP_GATTS_START_EVT: if(create_tab1 == false) { ESP_LOGI(GATTS_TABLE_TAG, "SERVICE_START_EVT1, status %d, service_handle %d", param->start.status, param->start.service_handle); esp_err_t create_attr_ret1 = esp_ble_gatts_create_attr_tab(gatt_db2, gatts_if, HRS_IDX_NB2, SVC_INST_ID1); if (create_attr_ret1){ ESP_LOGE(GATTS_TABLE_TAG, "create attr table2 failed, error code = %x", create_attr_ret1); } create_tab1 = true; } else { ESP_LOGI(GATTS_TABLE_TAG, "SERVICE_START_EVT2, status %d, service_handle %d", param->start.status, param->start.service_handle); } break; case ESP_GATTS_CONNECT_EVT: ESP_LOGI(GATTS_TABLE_TAG, "ESP_GATTS_CONNECT_EVT, conn_id = %d", param->connect.conn_id); esp_log_buffer_hex(GATTS_TABLE_TAG, param->connect.remote_bda, 6); esp_ble_conn_update_params_t conn_params = {0}; memcpy(conn_params.bda, param->connect.remote_bda, sizeof(esp_bd_addr_t)); /* For the iOS system, please refer to Apple official documents about the BLE connection parameters restrictions. */ conn_params.latency = 0; conn_params.max_int = 0x20; // max_int = 0x20*1.25ms = 40ms conn_params.min_int = 0x10; // min_int = 0x10*1.25ms = 20ms conn_params.timeout = 400; // timeout = 400*10ms = 4000ms //start sent the update connection parameters to the peer device. esp_ble_gap_update_conn_params(&conn_params); break; case ESP_GATTS_DISCONNECT_EVT: ESP_LOGI(GATTS_TABLE_TAG, "ESP_GATTS_DISCONNECT_EVT, reason = 0x%x", param->disconnect.reason); esp_ble_gap_start_advertising(&adv_params); break; case ESP_GATTS_CREAT_ATTR_TAB_EVT:{ if(create_tab1 == false) { if (param->add_attr_tab.status != ESP_GATT_OK){ ESP_LOGE(GATTS_TABLE_TAG, "create attribute table failed, error code=0x%x", param->add_attr_tab.status); } else if (param->add_attr_tab.num_handle != HRS_IDX_NB){ ESP_LOGE(GATTS_TABLE_TAG, "create attribute table abnormally, num_handle (%d) \ doesn't equal to HRS_IDX_NB(%d)", param->add_attr_tab.num_handle, HRS_IDX_NB); } else { ESP_LOGI(GATTS_TABLE_TAG, "create attribute table successfully, the number handle = %d\n",param->add_attr_tab.num_handle); memcpy(heart_rate_handle_table, param->add_attr_tab.handles, sizeof(heart_rate_handle_table)); esp_ble_gatts_start_service(heart_rate_handle_table[IDX_SVC]); } } else { if (param->add_attr_tab.status != ESP_GATT_OK){ ESP_LOGE(GATTS_TABLE_TAG, "create attribute table failed, error code=0x%x", param->add_attr_tab.status); } else if (param->add_attr_tab.num_handle != HRS_IDX_NB2){ ESP_LOGE(GATTS_TABLE_TAG, "create attribute table abnormally, num_handle (%d) \ doesn't equal to HRS_IDX_NB(%d)", param->add_attr_tab.num_handle, HRS_IDX_NB2); } else { ESP_LOGI(GATTS_TABLE_TAG, "create attribute table successfully, the number handle = %d\n",param->add_attr_tab.num_handle); memcpy(heart_rate_handle_table2, param->add_attr_tab.handles, sizeof(heart_rate_handle_table2)); esp_ble_gatts_start_service(heart_rate_handle_table2[IDX_SVC2]); } } break; } case ESP_GATTS_STOP_EVT: case ESP_GATTS_OPEN_EVT: case ESP_GATTS_CANCEL_OPEN_EVT: case ESP_GATTS_CLOSE_EVT: case ESP_GATTS_LISTEN_EVT: case ESP_GATTS_CONGEST_EVT: case ESP_GATTS_UNREG_EVT: case ESP_GATTS_DELETE_EVT: default: break; }}
static void gatts_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param){
/* If event is register event, store the gatts_if for each profile */ if (event == ESP_GATTS_REG_EVT) { if (param->reg.status == ESP_GATT_OK) { heart_rate_profile_tab[PROFILE_APP_IDX].gatts_if = gatts_if; } else { ESP_LOGE(GATTS_TABLE_TAG, "reg app failed, app_id %04x, status %d", param->reg.app_id, param->reg.status); return; } } do { int idx; for (idx = 0; idx < PROFILE_NUM; idx++) { /* ESP_GATT_IF_NONE, not specify a certain gatt_if, need to call every profile cb function */ if (gatts_if == ESP_GATT_IF_NONE || gatts_if == heart_rate_profile_tab[idx].gatts_if) { if (heart_rate_profile_tab[idx].gatts_cb) { heart_rate_profile_tab[idx].gatts_cb(event, gatts_if, param); } } } } while (0);}
void app_main(void){ esp_err_t ret;
/* Initialize NVS. */ ret = nvs_flash_init(); if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) { ESP_ERROR_CHECK(nvs_flash_erase()); ret = nvs_flash_init(); } ESP_ERROR_CHECK( ret );
ESP_ERROR_CHECK(esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT));
esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT(); ret = esp_bt_controller_init(&bt_cfg); if (ret) { ESP_LOGE(GATTS_TABLE_TAG, "%s enable controller failed: %s", __func__, esp_err_to_name(ret)); return; }
ret = esp_bt_controller_enable(ESP_BT_MODE_BLE); if (ret) { ESP_LOGE(GATTS_TABLE_TAG, "%s enable controller failed: %s", __func__, esp_err_to_name(ret)); return; }
ret = esp_bluedroid_init(); if (ret) { ESP_LOGE(GATTS_TABLE_TAG, "%s init bluetooth failed: %s", __func__, esp_err_to_name(ret)); return; }
ret = esp_bluedroid_enable(); if (ret) { ESP_LOGE(GATTS_TABLE_TAG, "%s enable bluetooth failed: %s", __func__, esp_err_to_name(ret)); return; }
ret = esp_ble_gatts_register_callback(gatts_event_handler); if (ret){ ESP_LOGE(GATTS_TABLE_TAG, "gatts register error, error code = %x", ret); return; }
ret = esp_ble_gap_register_callback(gap_event_handler); if (ret){ ESP_LOGE(GATTS_TABLE_TAG, "gap register error, error code = %x", ret); return; }
ret = esp_ble_gatts_app_register(ESP_APP_ID); if (ret){ ESP_LOGE(GATTS_TABLE_TAG, "gatts app register error, error code = %x", ret); return; }
esp_err_t local_mtu_ret = esp_ble_gatt_set_local_mtu(500); if (local_mtu_ret){ ESP_LOGE(GATTS_TABLE_TAG, "set local MTU failed, error code = %x", local_mtu_ret); }}
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gatts_table_creat_demo.h
/* 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 <stdlib.h>#include <string.h>
/* Attributes State Machine */enum{ IDX_SVC, IDX_CHAR_A, IDX_CHAR_VAL_A, IDX_CHAR_CFG_A,
IDX_CHAR_B, IDX_CHAR_VAL_B,
IDX_CHAR_C, IDX_CHAR_VAL_C,
IDX_CHAR_D, IDX_CHAR_VAL_D,
HRS_IDX_NB,};
enum{ IDX_SVC2, IDX_CHAR_A2, IDX_CHAR_VAL_A2,
HRS_IDX_NB2,};
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原文链接:【http://xie.infoq.cn/article/a14a26ed4948ede0650ac279b】。文章转载请联系作者。
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