/* * SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Unlicense OR CC0-1.0 *//* ... */ /**************************************************************************** * * This demo showcases BLE GATT server. It can send adv data, be connected by client. * Run the gatt_client demo, the client demo will automatically connect to the gatt_server demo. * Client demo will enable gatt_server's notify after connection. The two devices will then exchange * data. * ****************************************************************************//* ... */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <inttypes.h> #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_defs.h" #include "esp_bt_main.h" #include "esp_bt_device.h" #include "esp_gatt_common_api.h" #include "sdkconfig.h"18 includes #define GATTS_TAG "GATTS_DEMO" ///Declare the static function static void gatts_profile_a_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param); static void gatts_profile_b_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param); #define GATTS_SERVICE_UUID_TEST_A 0x00FF #define GATTS_CHAR_UUID_TEST_A 0xFF01 #define GATTS_DESCR_UUID_TEST_A 0x3333 #define GATTS_NUM_HANDLE_TEST_A 4 #define GATTS_SERVICE_UUID_TEST_B 0x00EE #define GATTS_CHAR_UUID_TEST_B 0xEE01 #define GATTS_DESCR_UUID_TEST_B 0x2222 #define GATTS_NUM_HANDLE_TEST_B 48 defines static char test_device_name[ESP_BLE_ADV_NAME_LEN_MAX] = "ESP_GATTS_DEMO"; #define TEST_MANUFACTURER_DATA_LEN 17 #define GATTS_DEMO_CHAR_VAL_LEN_MAX 0x40 #define PREPARE_BUF_MAX_SIZE 1024 static uint8_t char1_str[] = {0x11,0x22,0x33}; static esp_gatt_char_prop_t a_property = 0; static esp_gatt_char_prop_t b_property = 0; static esp_attr_value_t gatts_demo_char1_val = { .attr_max_len = GATTS_DEMO_CHAR_VAL_LEN_MAX, .attr_len = sizeof(char1_str), .attr_value = char1_str, }{...}; static uint8_t adv_config_done = 0; #define adv_config_flag (1 << 0) #define scan_rsp_config_flag (1 << 1) #ifdef CONFIG_EXAMPLE_SET_RAW_ADV_DATA static uint8_t raw_adv_data[] = { /* Flags */ 0x02, ESP_BLE_AD_TYPE_FLAG, 0x06, // Length 2, Data Type ESP_BLE_AD_TYPE_FLAG, Data 1 (LE General Discoverable Mode, BR/EDR Not Supported) /* TX Power Level */ 0x02, ESP_BLE_AD_TYPE_TX_PWR, 0xEB, // Length 2, Data Type ESP_BLE_AD_TYPE_TX_PWR, Data 2 (-21) /* Complete 16-bit Service UUIDs */ 0x03, ESP_BLE_AD_TYPE_16SRV_CMPL, 0xAB, 0xCD // Length 3, Data Type ESP_BLE_AD_TYPE_16SRV_CMPL, Data 3 (UUID) }{...}; static uint8_t raw_scan_rsp_data[] = { /* Complete Local Name */ 0x0F, ESP_BLE_AD_TYPE_NAME_CMPL, 'E', 'S', 'P', '_', 'G', 'A', 'T', 'T', 'S', '_', 'D', 'E', 'M', 'O' // Length 15, Data Type ESP_BLE_AD_TYPE_NAME_CMPL, Data (ESP_GATTS_DEMO) }{...};/* ... */ #else static uint8_t adv_service_uuid128[32] = { /* LSB <--------------------------------------------------------------------------------> MSB */ //first uuid, 16bit, [12],[13] is the value 0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80, 0x00, 0x10, 0x00, 0x00, 0xEE, 0x00, 0x00, 0x00, //second uuid, 32bit, [12], [13], [14], [15] 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 uint8_t test_manufacturer[TEST_MANUFACTURER_DATA_LEN] = {0x12, 0x23, 0x45, 0x56}; //adv data static esp_ble_adv_data_t adv_data = { .set_scan_rsp = false, .include_name = true, .include_txpower = false, .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[0], .service_data_len = 0, .p_service_data = NULL, .service_uuid_len = sizeof(adv_service_uuid128), .p_service_uuid = adv_service_uuid128, .flag = (ESP_BLE_ADV_FLAG_GEN_DISC | ESP_BLE_ADV_FLAG_BREDR_NOT_SPT), }{...}; // scan response data static 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(adv_service_uuid128), .p_service_uuid = adv_service_uuid128, .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, //.peer_addr = //.peer_addr_type = .channel_map = ADV_CHNL_ALL, .adv_filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY, }{...}; #define PROFILE_NUM 2 #define PROFILE_A_APP_ID 0 #define PROFILE_B_APP_ID 1 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; }{...}; /* 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 gl_profile_tab[PROFILE_NUM] = { [PROFILE_A_APP_ID] = { .gatts_cb = gatts_profile_a_event_handler, .gatts_if = ESP_GATT_IF_NONE, /* Not get the gatt_if, so initial is ESP_GATT_IF_NONE */ }{...}, [PROFILE_B_APP_ID] = { .gatts_cb = gatts_profile_b_event_handler, /* This demo does not implement, similar as profile A */ .gatts_if = ESP_GATT_IF_NONE, /* Not get the gatt_if, so initial is ESP_GATT_IF_NONE */ }{...}, }{...}; typedef struct { uint8_t *prepare_buf; int prepare_len; }{...} prepare_type_env_t; static prepare_type_env_t a_prepare_write_env; static prepare_type_env_t b_prepare_write_env; void example_write_event_env(esp_gatt_if_t gatts_if, prepare_type_env_t *prepare_write_env, esp_ble_gatts_cb_param_t *param); void example_exec_write_event_env(prepare_type_env_t *prepare_write_env, esp_ble_gatts_cb_param_t *param); 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_TAG, "Advertising start failed, status %d", param->adv_start_cmpl.status); break; }{...} ESP_LOGI(GATTS_TAG, "Advertising start successfully"); break;... case ESP_GAP_BLE_ADV_STOP_COMPLETE_EVT: if (param->adv_start_cmpl.status != ESP_BT_STATUS_SUCCESS) { ESP_LOGE(GATTS_TAG, "Advertising stop failed, status %d", param->adv_stop_cmpl.status); break; }{...} ESP_LOGI(GATTS_TAG, "Advertising stop successfully"); break;... case ESP_GAP_BLE_UPDATE_CONN_PARAMS_EVT: ESP_LOGI(GATTS_TAG, "Connection params update, status %d, conn_int %d, latency %d, timeout %d", param->update_conn_params.status, param->update_conn_params.conn_int, param->update_conn_params.latency, param->update_conn_params.timeout); break;... case ESP_GAP_BLE_SET_PKT_LENGTH_COMPLETE_EVT: ESP_LOGI(GATTS_TAG, "Packet length update, status %d, rx %d, tx %d", param->pkt_data_length_cmpl.status, param->pkt_data_length_cmpl.params.rx_len, param->pkt_data_length_cmpl.params.tx_len); break;... default: break;... }{...} }{...} void example_write_event_env(esp_gatt_if_t gatts_if, prepare_type_env_t *prepare_write_env, esp_ble_gatts_cb_param_t *param){ esp_gatt_status_t status = ESP_GATT_OK; if (param->write.need_rsp){ if (param->write.is_prep) { 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; }{...} if (status == ESP_GATT_OK && 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_TAG, "Gatt_server prep no mem"); status = ESP_GATT_NO_RESOURCES; }{...} }{...} esp_gatt_rsp_t *gatt_rsp = (esp_gatt_rsp_t *)malloc(sizeof(esp_gatt_rsp_t)); if (gatt_rsp) { 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_TAG, "Send response error\n"); }{...} free(gatt_rsp); }{...} else { ESP_LOGE(GATTS_TAG, "malloc failed, no resource to send response error\n"); status = ESP_GATT_NO_RESOURCES; }{...} 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; }{...}else{ esp_ble_gatts_send_response(gatts_if, param->write.conn_id, param->write.trans_id, status, NULL); } }{...} }{...} 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){ ESP_LOG_BUFFER_HEX(GATTS_TAG, prepare_write_env->prepare_buf, prepare_write_env->prepare_len); }{...}else{ ESP_LOGI(GATTS_TAG,"Prepare 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; }{...} static void gatts_profile_a_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_LOGI(GATTS_TAG, "GATT server register, status %d, app_id %d, gatts_if %d", param->reg.status, param->reg.app_id, gatts_if); gl_profile_tab[PROFILE_A_APP_ID].service_id.is_primary = true; gl_profile_tab[PROFILE_A_APP_ID].service_id.id.inst_id = 0x00; gl_profile_tab[PROFILE_A_APP_ID].service_id.id.uuid.len = ESP_UUID_LEN_16; gl_profile_tab[PROFILE_A_APP_ID].service_id.id.uuid.uuid.uuid16 = GATTS_SERVICE_UUID_TEST_A; esp_err_t set_dev_name_ret = esp_ble_gap_set_device_name(test_device_name); if (set_dev_name_ret){ ESP_LOGE(GATTS_TAG, "set device name failed, error code = %x", set_dev_name_ret); }{...} #ifdef CONFIG_EXAMPLE_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_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_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_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_TAG, "config scan response data failed, error code = %x", ret); }{...} adv_config_done |= scan_rsp_config_flag; /* ... */ #endif esp_ble_gatts_create_service(gatts_if, &gl_profile_tab[PROFILE_A_APP_ID].service_id, GATTS_NUM_HANDLE_TEST_A); break;... case ESP_GATTS_READ_EVT: { ESP_LOGI(GATTS_TAG, "Characteristic read, conn_id %d, trans_id %" PRIu32 ", handle %d", param->read.conn_id, param->read.trans_id, param->read.handle); esp_gatt_rsp_t rsp; memset(&rsp, 0, sizeof(esp_gatt_rsp_t)); rsp.attr_value.handle = param->read.handle; rsp.attr_value.len = 4; rsp.attr_value.value[0] = 0xde; rsp.attr_value.value[1] = 0xed; rsp.attr_value.value[2] = 0xbe; rsp.attr_value.value[3] = 0xef; esp_ble_gatts_send_response(gatts_if, param->read.conn_id, param->read.trans_id, ESP_GATT_OK, &rsp); break; }{...} ... case ESP_GATTS_WRITE_EVT: { ESP_LOGI(GATTS_TAG, "Characteristic write, conn_id %d, trans_id %" PRIu32 ", handle %d", param->write.conn_id, param->write.trans_id, param->write.handle); if (!param->write.is_prep){ ESP_LOGI(GATTS_TAG, "value len %d, value ", param->write.len); ESP_LOG_BUFFER_HEX(GATTS_TAG, param->write.value, param->write.len); if (gl_profile_tab[PROFILE_A_APP_ID].descr_handle == param->write.handle && param->write.len == 2){ uint16_t descr_value = param->write.value[1]<<8 | param->write.value[0]; if (descr_value == 0x0001){ if (a_property & ESP_GATT_CHAR_PROP_BIT_NOTIFY){ ESP_LOGI(GATTS_TAG, "Notification 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, gl_profile_tab[PROFILE_A_APP_ID].char_handle, sizeof(notify_data), notify_data, false); }{...} }{...}else if (descr_value == 0x0002){ if (a_property & ESP_GATT_CHAR_PROP_BIT_INDICATE){ ESP_LOGI(GATTS_TAG, "Indication 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, gl_profile_tab[PROFILE_A_APP_ID].char_handle, sizeof(indicate_data), indicate_data, true); }{...} }{...} else if (descr_value == 0x0000){ ESP_LOGI(GATTS_TAG, "Notification/Indication disable"); }{...}else{ ESP_LOGE(GATTS_TAG, "Unknown descriptor value"); ESP_LOG_BUFFER_HEX(GATTS_TAG, param->write.value, param->write.len); } }{...} }{...} example_write_event_env(gatts_if, &a_prepare_write_env, param); break; }{...} ... case ESP_GATTS_EXEC_WRITE_EVT: ESP_LOGI(GATTS_TAG,"Execute write"); esp_ble_gatts_send_response(gatts_if, param->write.conn_id, param->write.trans_id, ESP_GATT_OK, NULL); example_exec_write_event_env(&a_prepare_write_env, param); break;... case ESP_GATTS_MTU_EVT: ESP_LOGI(GATTS_TAG, "MTU exchange, MTU %d", param->mtu.mtu); break;... case ESP_GATTS_UNREG_EVT: break;... case ESP_GATTS_CREATE_EVT: ESP_LOGI(GATTS_TAG, "Service create, status %d, service_handle %d", param->create.status, param->create.service_handle); gl_profile_tab[PROFILE_A_APP_ID].service_handle = param->create.service_handle; gl_profile_tab[PROFILE_A_APP_ID].char_uuid.len = ESP_UUID_LEN_16; gl_profile_tab[PROFILE_A_APP_ID].char_uuid.uuid.uuid16 = GATTS_CHAR_UUID_TEST_A; esp_ble_gatts_start_service(gl_profile_tab[PROFILE_A_APP_ID].service_handle); a_property = ESP_GATT_CHAR_PROP_BIT_READ | ESP_GATT_CHAR_PROP_BIT_WRITE | ESP_GATT_CHAR_PROP_BIT_NOTIFY; esp_err_t add_char_ret = esp_ble_gatts_add_char(gl_profile_tab[PROFILE_A_APP_ID].service_handle, &gl_profile_tab[PROFILE_A_APP_ID].char_uuid, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, a_property, &gatts_demo_char1_val, NULL); if (add_char_ret){ ESP_LOGE(GATTS_TAG, "add char failed, error code =%x",add_char_ret); }{...} break;... case ESP_GATTS_ADD_INCL_SRVC_EVT: break;... case ESP_GATTS_ADD_CHAR_EVT: { uint16_t length = 0; const uint8_t *prf_char; ESP_LOGI(GATTS_TAG, "Characteristic add, status %d, attr_handle %d, service_handle %d", param->add_char.status, param->add_char.attr_handle, param->add_char.service_handle); gl_profile_tab[PROFILE_A_APP_ID].char_handle = param->add_char.attr_handle; gl_profile_tab[PROFILE_A_APP_ID].descr_uuid.len = ESP_UUID_LEN_16; gl_profile_tab[PROFILE_A_APP_ID].descr_uuid.uuid.uuid16 = ESP_GATT_UUID_CHAR_CLIENT_CONFIG; esp_err_t get_attr_ret = esp_ble_gatts_get_attr_value(param->add_char.attr_handle, &length, &prf_char); if (get_attr_ret == ESP_FAIL){ ESP_LOGE(GATTS_TAG, "ILLEGAL HANDLE"); }{...} ESP_LOGI(GATTS_TAG, "the gatts demo char length = %x", length); for(int i = 0; i < length; i++){ ESP_LOGI(GATTS_TAG, "prf_char[%x] =%x",i,prf_char[i]); }{...} esp_err_t add_descr_ret = esp_ble_gatts_add_char_descr(gl_profile_tab[PROFILE_A_APP_ID].service_handle, &gl_profile_tab[PROFILE_A_APP_ID].descr_uuid, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, NULL, NULL); if (add_descr_ret){ ESP_LOGE(GATTS_TAG, "add char descr failed, error code =%x", add_descr_ret); }{...} break; }{...} ... case ESP_GATTS_ADD_CHAR_DESCR_EVT: gl_profile_tab[PROFILE_A_APP_ID].descr_handle = param->add_char_descr.attr_handle; ESP_LOGI(GATTS_TAG, "Descriptor add, status %d, attr_handle %d, service_handle %d", param->add_char_descr.status, param->add_char_descr.attr_handle, param->add_char_descr.service_handle); break;... case ESP_GATTS_DELETE_EVT: break;... case ESP_GATTS_START_EVT: ESP_LOGI(GATTS_TAG, "Service start, status %d, service_handle %d", param->start.status, param->start.service_handle); break;... case ESP_GATTS_STOP_EVT: break;... case ESP_GATTS_CONNECT_EVT: { 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 reference the 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 ESP_LOGI(GATTS_TAG, "Connected, conn_id %u, remote "ESP_BD_ADDR_STR"", param->connect.conn_id, ESP_BD_ADDR_HEX(param->connect.remote_bda)); gl_profile_tab[PROFILE_A_APP_ID].conn_id = param->connect.conn_id; //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_TAG, "Disconnected, remote "ESP_BD_ADDR_STR", reason 0x%02x", ESP_BD_ADDR_HEX(param->disconnect.remote_bda), param->disconnect.reason); esp_ble_gap_start_advertising(&adv_params); break;... case ESP_GATTS_CONF_EVT: ESP_LOGI(GATTS_TAG, "Confirm receive, status %d, attr_handle %d", param->conf.status, param->conf.handle); if (param->conf.status != ESP_GATT_OK){ ESP_LOG_BUFFER_HEX(GATTS_TAG, param->conf.value, param->conf.len); }{...} break;... 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: default: break;... }{...} }{...} static void gatts_profile_b_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_LOGI(GATTS_TAG, "GATT server register, status %d, app_id %d, gatts_if %d", param->reg.status, param->reg.app_id, gatts_if); gl_profile_tab[PROFILE_B_APP_ID].service_id.is_primary = true; gl_profile_tab[PROFILE_B_APP_ID].service_id.id.inst_id = 0x00; gl_profile_tab[PROFILE_B_APP_ID].service_id.id.uuid.len = ESP_UUID_LEN_16; gl_profile_tab[PROFILE_B_APP_ID].service_id.id.uuid.uuid.uuid16 = GATTS_SERVICE_UUID_TEST_B; esp_ble_gatts_create_service(gatts_if, &gl_profile_tab[PROFILE_B_APP_ID].service_id, GATTS_NUM_HANDLE_TEST_B); break;... case ESP_GATTS_READ_EVT: { ESP_LOGI(GATTS_TAG, "Characteristic read, conn_id %d, trans_id %" PRIu32 ", handle %d", param->read.conn_id, param->read.trans_id, param->read.handle); esp_gatt_rsp_t rsp; memset(&rsp, 0, sizeof(esp_gatt_rsp_t)); rsp.attr_value.handle = param->read.handle; rsp.attr_value.len = 4; rsp.attr_value.value[0] = 0xde; rsp.attr_value.value[1] = 0xed; rsp.attr_value.value[2] = 0xbe; rsp.attr_value.value[3] = 0xef; esp_ble_gatts_send_response(gatts_if, param->read.conn_id, param->read.trans_id, ESP_GATT_OK, &rsp); break; }{...} ... case ESP_GATTS_WRITE_EVT: { ESP_LOGI(GATTS_TAG, "Characteristic write, conn_id %d, trans_id %" PRIu32 ", handle %d", param->write.conn_id, param->write.trans_id, param->write.handle); if (!param->write.is_prep){ ESP_LOGI(GATTS_TAG, "value len %d, value ", param->write.len); ESP_LOG_BUFFER_HEX(GATTS_TAG, param->write.value, param->write.len); if (gl_profile_tab[PROFILE_B_APP_ID].descr_handle == param->write.handle && param->write.len == 2){ uint16_t descr_value= param->write.value[1]<<8 | param->write.value[0]; if (descr_value == 0x0001){ if (b_property & ESP_GATT_CHAR_PROP_BIT_NOTIFY) { ESP_LOGI(GATTS_TAG, "Notification 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, gl_profile_tab[PROFILE_B_APP_ID].char_handle, sizeof(notify_data), notify_data, false); }{...} }{...}else if (descr_value == 0x0002){ if (b_property & ESP_GATT_CHAR_PROP_BIT_INDICATE){ ESP_LOGI(GATTS_TAG, "Indication 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, gl_profile_tab[PROFILE_B_APP_ID].char_handle, sizeof(indicate_data), indicate_data, true); }{...} }{...} else if (descr_value == 0x0000){ ESP_LOGI(GATTS_TAG, "Notification/Indication disable"); }{...}else{ ESP_LOGE(GATTS_TAG, "Unknown value"); } }{...} }{...} example_write_event_env(gatts_if, &b_prepare_write_env, param); break; }{...} ... case ESP_GATTS_EXEC_WRITE_EVT: ESP_LOGI(GATTS_TAG,"Execute write"); esp_ble_gatts_send_response(gatts_if, param->write.conn_id, param->write.trans_id, ESP_GATT_OK, NULL); example_exec_write_event_env(&b_prepare_write_env, param); break;... case ESP_GATTS_MTU_EVT: ESP_LOGI(GATTS_TAG, "MTU exchange, MTU %d", param->mtu.mtu); break;... case ESP_GATTS_UNREG_EVT: break;... case ESP_GATTS_CREATE_EVT: ESP_LOGI(GATTS_TAG, "Service create, status %d, service_handle %d", param->create.status, param->create.service_handle); gl_profile_tab[PROFILE_B_APP_ID].service_handle = param->create.service_handle; gl_profile_tab[PROFILE_B_APP_ID].char_uuid.len = ESP_UUID_LEN_16; gl_profile_tab[PROFILE_B_APP_ID].char_uuid.uuid.uuid16 = GATTS_CHAR_UUID_TEST_B; esp_ble_gatts_start_service(gl_profile_tab[PROFILE_B_APP_ID].service_handle); b_property = ESP_GATT_CHAR_PROP_BIT_READ | ESP_GATT_CHAR_PROP_BIT_WRITE | ESP_GATT_CHAR_PROP_BIT_NOTIFY; esp_err_t add_char_ret =esp_ble_gatts_add_char( gl_profile_tab[PROFILE_B_APP_ID].service_handle, &gl_profile_tab[PROFILE_B_APP_ID].char_uuid, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, b_property, NULL, NULL); if (add_char_ret){ ESP_LOGE(GATTS_TAG, "add char failed, error code =%x",add_char_ret); }{...} break;... case ESP_GATTS_ADD_INCL_SRVC_EVT: break;... case ESP_GATTS_ADD_CHAR_EVT: ESP_LOGI(GATTS_TAG, "Characteristic add, status %d, attr_handle %d, service_handle %d", param->add_char.status, param->add_char.attr_handle, param->add_char.service_handle); gl_profile_tab[PROFILE_B_APP_ID].char_handle = param->add_char.attr_handle; gl_profile_tab[PROFILE_B_APP_ID].descr_uuid.len = ESP_UUID_LEN_16; gl_profile_tab[PROFILE_B_APP_ID].descr_uuid.uuid.uuid16 = ESP_GATT_UUID_CHAR_CLIENT_CONFIG; esp_ble_gatts_add_char_descr(gl_profile_tab[PROFILE_B_APP_ID].service_handle, &gl_profile_tab[PROFILE_B_APP_ID].descr_uuid, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, NULL, NULL); break;... case ESP_GATTS_ADD_CHAR_DESCR_EVT: gl_profile_tab[PROFILE_B_APP_ID].descr_handle = param->add_char_descr.attr_handle; ESP_LOGI(GATTS_TAG, "Descriptor add, status %d, attr_handle %d, service_handle %d", param->add_char_descr.status, param->add_char_descr.attr_handle, param->add_char_descr.service_handle); break;... case ESP_GATTS_DELETE_EVT: break;... case ESP_GATTS_START_EVT: ESP_LOGI(GATTS_TAG, "Service start, status %d, service_handle %d", param->start.status, param->start.service_handle); break;... case ESP_GATTS_STOP_EVT: break;... case ESP_GATTS_CONNECT_EVT: ESP_LOGI(GATTS_TAG, "Connected, conn_id %d, remote "ESP_BD_ADDR_STR"", param->connect.conn_id, ESP_BD_ADDR_HEX(param->connect.remote_bda)); gl_profile_tab[PROFILE_B_APP_ID].conn_id = param->connect.conn_id; break;... case ESP_GATTS_CONF_EVT: ESP_LOGI(GATTS_TAG, "Confirm receive, status %d, attr_handle %d", param->conf.status, param->conf.handle); if (param->conf.status != ESP_GATT_OK){ ESP_LOG_BUFFER_HEX(GATTS_TAG, param->conf.value, param->conf.len); }{...} break;... case ESP_GATTS_DISCONNECT_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: 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) { gl_profile_tab[param->reg.app_id].gatts_if = gatts_if; }{...} else { ESP_LOGI(GATTS_TAG, "Reg app failed, app_id %04x, status %d", param->reg.app_id, param->reg.status); return; }{...} }{...} /* If the gatts_if equal to profile A, call profile A cb handler, * so here call each profile's callback *//* ... */ do { int idx; for (idx = 0; idx < PROFILE_NUM; idx++) { if (gatts_if == ESP_GATT_IF_NONE || /* ESP_GATT_IF_NONE, not specify a certain gatt_if, need to call every profile cb function */ gatts_if == gl_profile_tab[idx].gatts_if) { if (gl_profile_tab[idx].gatts_cb) { gl_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 ); #if CONFIG_EXAMPLE_CI_PIPELINE_ID memcpy(test_device_name, esp_bluedroid_get_example_name(), ESP_BLE_ADV_NAME_LEN_MAX); #endif 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_TAG, "%s initialize controller failed: %s", __func__, esp_err_to_name(ret)); return; }{...} ret = esp_bt_controller_enable(ESP_BT_MODE_BLE); if (ret) { ESP_LOGE(GATTS_TAG, "%s enable controller failed: %s", __func__, esp_err_to_name(ret)); return; }{...} ret = esp_bluedroid_init(); if (ret) { ESP_LOGE(GATTS_TAG, "%s init bluetooth failed: %s", __func__, esp_err_to_name(ret)); return; }{...} ret = esp_bluedroid_enable(); if (ret) { ESP_LOGE(GATTS_TAG, "%s enable bluetooth failed: %s", __func__, esp_err_to_name(ret)); return; }{...} // Note: Avoid performing time-consuming operations within callback functions. ret = esp_ble_gatts_register_callback(gatts_event_handler); if (ret){ ESP_LOGE(GATTS_TAG, "gatts register error, error code = %x", ret); return; }{...} ret = esp_ble_gap_register_callback(gap_event_handler); if (ret){ ESP_LOGE(GATTS_TAG, "gap register error, error code = %x", ret); return; }{...} ret = esp_ble_gatts_app_register(PROFILE_A_APP_ID); if (ret){ ESP_LOGE(GATTS_TAG, "gatts app register error, error code = %x", ret); return; }{...} ret = esp_ble_gatts_app_register(PROFILE_B_APP_ID); if (ret){ ESP_LOGE(GATTS_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_TAG, "set local MTU failed, error code = %x", local_mtu_ret); }{...} return; }{...}