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esp-idf/examples/bluetooth/bluedroid/ble/gatt_server/main/gatts_demo.c

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/*
* 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"
#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 4
#define TEST_DEVICE_NAME "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_SET_RAW_ADV_DATA
static uint8_t raw_adv_data[] = {
0x02, 0x01, 0x06, // Length 2, Data Type 1 (Flags), Data 1 (LE General Discoverable Mode, BR/EDR Not Supported)
0x02, 0x0a, 0xeb, // Length 2, Data Type 10 (TX power level), Data 2 (-21)
0x03, 0x03, 0xab, 0xcd, // Length 3, Data Type 3 (Complete 16-bit Service UUIDs), Data 3 (UUID)
};
static uint8_t raw_scan_rsp_data[] = { // Length 15, Data Type 9 (Complete Local Name), Data 1 (ESP_GATTS_DEMO)
0x0f, 0x09, 0x45, 0x53, 0x50, 0x5f, 0x47, 0x41, 0x54, 0x54, 0x53, 0x5f, 0x44,
0x45, 0x4d, 0x4f
};
#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");
}
break;
case ESP_GAP_BLE_ADV_STOP_COMPLETE_EVT:
if (param->adv_stop_cmpl.status != ESP_BT_STATUS_SUCCESS) {
ESP_LOGE(GATTS_TAG, "Advertising stop failed");
} else {
ESP_LOGI(GATTS_TAG, "Stop adv successfully");
}
break;
case ESP_GAP_BLE_UPDATE_CONN_PARAMS_EVT:
ESP_LOGI(GATTS_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;
case ESP_GAP_BLE_SET_PKT_LENGTH_COMPLETE_EVT:
ESP_LOGI(GATTS_TAG, "packet length updated: rx = %d, tx = %d, status = %d",
param->pkt_data_length_cmpl.params.rx_len,
param->pkt_data_length_cmpl.params.tx_len,
param->pkt_data_length_cmpl.status);
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,"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;
}
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, "REGISTER_APP_EVT, status %d, app_id %d", param->reg.status, param->reg.app_id);
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_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, "GATT_READ_EVT, 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, "GATT_WRITE_EVT, 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, "GATT_WRITE_EVT, 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, "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, 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, "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, gl_profile_tab[PROFILE_A_APP_ID].char_handle,
sizeof(indicate_data), indicate_data, true);
}
}
else if (descr_value == 0x0000){
ESP_LOGI(GATTS_TAG, "notify/indicate disable ");
}else{
ESP_LOGE(GATTS_TAG, "unknown descr 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,"ESP_GATTS_EXEC_WRITE_EVT");
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, "ESP_GATTS_MTU_EVT, MTU %d", param->mtu.mtu);
break;
case ESP_GATTS_UNREG_EVT:
break;
case ESP_GATTS_CREATE_EVT:
ESP_LOGI(GATTS_TAG, "CREATE_SERVICE_EVT, 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, "ADD_CHAR_EVT, 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, "ADD_DESCR_EVT, 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_EVT, 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, "ESP_GATTS_CONNECT_EVT, conn_id %d, remote %02x:%02x:%02x:%02x:%02x:%02x:",
param->connect.conn_id,
param->connect.remote_bda[0], param->connect.remote_bda[1], param->connect.remote_bda[2],
param->connect.remote_bda[3], param->connect.remote_bda[4], param->connect.remote_bda[5]);
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, "ESP_GATTS_DISCONNECT_EVT, disconnect reason 0x%x", param->disconnect.reason);
esp_ble_gap_start_advertising(&adv_params);
break;
case ESP_GATTS_CONF_EVT:
ESP_LOGI(GATTS_TAG, "ESP_GATTS_CONF_EVT, 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, "REGISTER_APP_EVT, status %d, app_id %d", param->reg.status, param->reg.app_id);
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, "GATT_READ_EVT, 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, "GATT_WRITE_EVT, 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, "GATT_WRITE_EVT, 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, "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, 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, "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, gl_profile_tab[PROFILE_B_APP_ID].char_handle,
sizeof(indicate_data), indicate_data, true);
}
}
else if (descr_value == 0x0000){
ESP_LOGI(GATTS_TAG, "notify/indicate 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,"ESP_GATTS_EXEC_WRITE_EVT");
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, "ESP_GATTS_MTU_EVT, MTU %d", param->mtu.mtu);
break;
case ESP_GATTS_UNREG_EVT:
break;
case ESP_GATTS_CREATE_EVT:
ESP_LOGI(GATTS_TAG, "CREATE_SERVICE_EVT, 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, "ADD_CHAR_EVT, 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, "ADD_DESCR_EVT, 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_EVT, 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, "CONNECT_EVT, conn_id %d, remote %02x:%02x:%02x:%02x:%02x:%02x:",
param->connect.conn_id,
param->connect.remote_bda[0], param->connect.remote_bda[1], param->connect.remote_bda[2],
param->connect.remote_bda[3], param->connect.remote_bda[4], param->connect.remote_bda[5]);
gl_profile_tab[PROFILE_B_APP_ID].conn_id = param->connect.conn_id;
break;
case ESP_GATTS_CONF_EVT:
ESP_LOGI(GATTS_TAG, "ESP_GATTS_CONF_EVT 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 );
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;
}
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;
}
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