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OVMS3-idf/examples/bluetooth/gatt_client/main/gattc_demo.c
Tian Hao 4fd437d466 component/bt : support remove bonded device 
1. add feature of remove bonded devices.
2. fix SMP key size bug
3. fix privacy bug
4. fix gatt set value bug
5. add gatt security client demo
6. change gatt server/gatt client demo
2017-09-22 20:19:02 +08:00

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// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/****************************************************************************
*
* This file is for gatt client. It can scan ble device, connect one device.
* Run the gatt_server demo, the client demo will automatically connect to the gatt_server demo.
* Client demo will enable gatt_server's notify after connection. Then the two devices will exchange
* data.
*
****************************************************************************/
#include <stdint.h>
#include <string.h>
#include <stdbool.h>
#include <stdio.h>
#include "nvs.h"
#include "nvs_flash.h"
#include "controller.h"
#include "bt.h"
#include "esp_gap_ble_api.h"
#include "esp_gattc_api.h"
#include "esp_gatt_defs.h"
#include "esp_bt_main.h"
#define GATTC_TAG "GATTC_DEMO"
#define REMOTE_SERVICE_UUID 0x00FF
#define REMOTE_NOTIFY_CHAR_UUID 0xFF01
///Declare static functions
static void esp_gap_cb(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *param);
static void esp_gattc_cb(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if, esp_ble_gattc_cb_param_t *param);
static void gattc_profile_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if, esp_ble_gattc_cb_param_t *param);
static esp_gatt_srvc_id_t gatt_server_demo_service_id = {
.id = {
.uuid = {
.len = ESP_UUID_LEN_16,
.uuid = {.uuid16 = REMOTE_SERVICE_UUID,},
},
.inst_id = 0,
},
.is_primary = true,
};
static esp_bt_uuid_t remote_filter_service_uuid = {
.len = ESP_UUID_LEN_16,
.uuid = {.uuid16 = REMOTE_SERVICE_UUID,},
};
static esp_gatt_id_t notify_descr_id = {
.uuid = {
.len = ESP_UUID_LEN_16,
.uuid = {.uuid16 = ESP_GATT_UUID_CHAR_CLIENT_CONFIG,},
},
.inst_id = 0,
};
static bool connect = false;
static bool get_server = false;
static const char remote_device_name[] = "ESP_GATTS_DEMO";
static esp_ble_scan_params_t ble_scan_params = {
.scan_type = BLE_SCAN_TYPE_ACTIVE,
.own_addr_type = BLE_ADDR_TYPE_PUBLIC,
.scan_filter_policy = BLE_SCAN_FILTER_ALLOW_ALL,
.scan_interval = 0x50,
.scan_window = 0x30
};
#define PROFILE_NUM 1
#define PROFILE_A_APP_ID 0
struct gattc_profile_inst {
esp_gattc_cb_t gattc_cb;
uint16_t gattc_if;
uint16_t app_id;
uint16_t conn_id;
esp_bd_addr_t remote_bda;
};
/* One gatt-based profile one app_id and one gattc_if, this array will store the gattc_if returned by ESP_GATTS_REG_EVT */
static struct gattc_profile_inst gl_profile_tab[PROFILE_NUM] = {
[PROFILE_A_APP_ID] = {
.gattc_cb = gattc_profile_event_handler,
.gattc_if = ESP_GATT_IF_NONE, /* Not get the gatt_if, so initial is ESP_GATT_IF_NONE */
},
};
static void gattc_profile_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if, esp_ble_gattc_cb_param_t *param)
{
uint16_t conn_id = 0;
esp_ble_gattc_cb_param_t *p_data = (esp_ble_gattc_cb_param_t *)param;
switch (event) {
case ESP_GATTC_REG_EVT:
ESP_LOGI(GATTC_TAG, "REG_EVT");
esp_err_t scan_ret = esp_ble_gap_set_scan_params(&ble_scan_params);
if (scan_ret){
ESP_LOGE(GATTC_TAG, "set scan params error, error code = %x", scan_ret);
}
break;
case ESP_GATTC_CONNECT_EVT:
//p_data->connect.status always be ESP_GATT_OK
ESP_LOGI(GATTC_TAG, "ESP_GATTC_CONNECT_EVT conn_id %d, if %d, status %d", conn_id, gattc_if, p_data->connect.status);
conn_id = p_data->connect.conn_id;
gl_profile_tab[PROFILE_A_APP_ID].conn_id = p_data->connect.conn_id;
memcpy(gl_profile_tab[PROFILE_A_APP_ID].remote_bda, p_data->connect.remote_bda, sizeof(esp_bd_addr_t));
ESP_LOGI(GATTC_TAG, "REMOTE BDA:");
esp_log_buffer_hex(GATTC_TAG, gl_profile_tab[PROFILE_A_APP_ID].remote_bda, sizeof(esp_bd_addr_t));
esp_err_t mtu_ret = esp_ble_gattc_config_mtu (gattc_if, conn_id, 200);
if (mtu_ret){
ESP_LOGE(GATTC_TAG, "config MTU error, error code = %x", mtu_ret);
}
break;
case ESP_GATTC_OPEN_EVT:
if (param->open.status != ESP_GATT_OK){
ESP_LOGE(GATTC_TAG, "open failed, status %d", p_data->open.status);
break;
}
ESP_LOGI(GATTC_TAG, "open success");
break;
case ESP_GATTC_CFG_MTU_EVT:
if (param->cfg_mtu.status != ESP_GATT_OK){
ESP_LOGE(GATTC_TAG,"config mtu failed, error status = %x", param->cfg_mtu.status);
}
ESP_LOGI(GATTC_TAG, "ESP_GATTC_CFG_MTU_EVT, Status %d, MTU %d, conn_id %d", param->cfg_mtu.status, param->cfg_mtu.mtu, param->cfg_mtu.conn_id);
esp_ble_gattc_search_service(gattc_if, param->cfg_mtu.conn_id, &remote_filter_service_uuid);
break;
case ESP_GATTC_SEARCH_RES_EVT: {
esp_gatt_srvc_id_t *srvc_id = &p_data->search_res.srvc_id;
conn_id = p_data->search_res.conn_id;
if (srvc_id->id.uuid.len == ESP_UUID_LEN_16 && srvc_id->id.uuid.uuid.uuid16 == REMOTE_SERVICE_UUID) {
get_server = true;
ESP_LOGI(GATTC_TAG, "UUID16: %x", srvc_id->id.uuid.uuid.uuid16);
}
break;
}
case ESP_GATTC_SEARCH_CMPL_EVT:
if (p_data->search_cmpl.status != ESP_GATT_OK){
ESP_LOGE(GATTC_TAG, "search service failed, error status = %x", p_data->search_cmpl.status);
break;
}
conn_id = p_data->search_cmpl.conn_id;
if (get_server){
esp_ble_gattc_get_characteristic(gattc_if, conn_id, &gatt_server_demo_service_id, NULL);
}
break;
case ESP_GATTC_GET_CHAR_EVT:
if (p_data->get_char.status != ESP_GATT_OK) {
ESP_LOGE(GATTC_TAG, "get char failed, error status = %x", p_data->get_char.status);
break;
}
ESP_LOGI(GATTC_TAG, "get char success");
ESP_LOGI(GATTC_TAG, "GET CHAR: srvc_id = %04x, char_id = %04x", p_data->get_char.srvc_id.id.uuid.uuid.uuid16, p_data->get_char.char_id.uuid.uuid.uuid16);
if (p_data->get_char.char_id.uuid.uuid.uuid16 == REMOTE_NOTIFY_CHAR_UUID) {
esp_ble_gattc_register_for_notify(gattc_if, gl_profile_tab[PROFILE_A_APP_ID].remote_bda, &gatt_server_demo_service_id, &p_data->get_char.char_id);
}
esp_ble_gattc_get_characteristic(gattc_if, conn_id, &gatt_server_demo_service_id, &p_data->get_char.char_id);
break;
case ESP_GATTC_REG_FOR_NOTIFY_EVT: {
if (p_data->reg_for_notify.status != ESP_GATT_OK){
ESP_LOGE(GATTC_TAG, "REG FOR NOTIFY failed: error status = %d", p_data->reg_for_notify.status);
break;
}
ESP_LOGI(GATTC_TAG, "REG FOR_NOTIFY: srvc_id = %04x, char_id = %04x", p_data->reg_for_notify.srvc_id.id.uuid.uuid.uuid16, p_data->reg_for_notify.char_id.uuid.uuid.uuid16);
uint16_t notify_en = 1;
esp_ble_gattc_write_char_descr( gattc_if,
conn_id,
&gatt_server_demo_service_id,
&p_data->reg_for_notify.char_id,
&notify_descr_id,
sizeof(notify_en),
(uint8_t *)&notify_en,
ESP_GATT_WRITE_TYPE_RSP,
ESP_GATT_AUTH_REQ_NONE);
break;
}
case ESP_GATTC_NOTIFY_EVT:
ESP_LOGI(GATTC_TAG, "ESP_GATTC_NOTIFY_EVT, Receive notify value:");
esp_log_buffer_hex(GATTC_TAG, p_data->notify.value, p_data->notify.value_len);
//write back
esp_ble_gattc_write_char(gattc_if,
gl_profile_tab[PROFILE_A_APP_ID].conn_id,
&gatt_server_demo_service_id,
&p_data->notify.char_id,
p_data->notify.value_len,
p_data->notify.value,
ESP_GATT_WRITE_TYPE_RSP,
ESP_GATT_AUTH_REQ_NONE);
break;
case ESP_GATTC_WRITE_DESCR_EVT:
if (p_data->write.status != ESP_GATT_OK){
ESP_LOGE(GATTC_TAG, "write descr failed, error status = %x", p_data->write.status);
break;
}
ESP_LOGI(GATTC_TAG, "write descr success ");
break;
case ESP_GATTC_SRVC_CHG_EVT: {
esp_bd_addr_t bda;
memcpy(bda, p_data->srvc_chg.remote_bda, sizeof(esp_bd_addr_t));
ESP_LOGI(GATTC_TAG, "ESP_GATTC_SRVC_CHG_EVT, bd_addr:");
esp_log_buffer_hex(GATTC_TAG, bda, sizeof(esp_bd_addr_t));
break;
}
case ESP_GATTC_WRITE_CHAR_EVT:
if (p_data->write.status != ESP_GATT_OK){
ESP_LOGE(GATTC_TAG, "write char failed, error status = %x", p_data->write.status);
break;
}
ESP_LOGI(GATTC_TAG, "write char success ");
break;
case ESP_GATTC_DISCONNECT_EVT:
connect = false;
get_server = false;
ESP_LOGI(GATTC_TAG, "ESP_GATTC_DISCONNECT_EVT, status = %d", p_data->disconnect.status);
break;
default:
break;
}
}
static void esp_gap_cb(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *param)
{
uint8_t *adv_name = NULL;
uint8_t adv_name_len = 0;
switch (event) {
case ESP_GAP_BLE_SCAN_PARAM_SET_COMPLETE_EVT: {
//the unit of the duration is second
uint32_t duration = 30;
esp_ble_gap_start_scanning(duration);
break;
}
case ESP_GAP_BLE_SCAN_START_COMPLETE_EVT:
//scan start complete event to indicate scan start successfully or failed
if (param->scan_start_cmpl.status != ESP_BT_STATUS_SUCCESS) {
ESP_LOGE(GATTC_TAG, "scan start failed, error status = %x", param->scan_start_cmpl.status);
break;
}
ESP_LOGI(GATTC_TAG, "scan start success");
break;
case ESP_GAP_BLE_SCAN_RESULT_EVT: {
esp_ble_gap_cb_param_t *scan_result = (esp_ble_gap_cb_param_t *)param;
switch (scan_result->scan_rst.search_evt) {
case ESP_GAP_SEARCH_INQ_RES_EVT:
esp_log_buffer_hex(GATTC_TAG, scan_result->scan_rst.bda, 6);
ESP_LOGI(GATTC_TAG, "searched Adv Data Len %d, Scan Response Len %d", scan_result->scan_rst.adv_data_len, scan_result->scan_rst.scan_rsp_len);
adv_name = esp_ble_resolve_adv_data(scan_result->scan_rst.ble_adv,
ESP_BLE_AD_TYPE_NAME_CMPL, &adv_name_len);
ESP_LOGI(GATTC_TAG, "searched Device Name Len %d", adv_name_len);
esp_log_buffer_char(GATTC_TAG, adv_name, adv_name_len);
ESP_LOGI(GATTC_TAG, "\n");
if (adv_name != NULL) {
if (strlen(remote_device_name) == adv_name_len && strncmp((char *)adv_name, remote_device_name, adv_name_len) == 0) {
ESP_LOGI(GATTC_TAG, "searched device %s\n", remote_device_name);
if (connect == false) {
connect = true;
ESP_LOGI(GATTC_TAG, "connect to the remote device.");
esp_ble_gap_stop_scanning();
esp_ble_gattc_open(gl_profile_tab[PROFILE_A_APP_ID].gattc_if, scan_result->scan_rst.bda, true);
}
}
}
break;
case ESP_GAP_SEARCH_INQ_CMPL_EVT:
break;
default:
break;
}
break;
}
case ESP_GAP_BLE_SCAN_STOP_COMPLETE_EVT:
if (param->scan_stop_cmpl.status != ESP_BT_STATUS_SUCCESS){
ESP_LOGE(GATTC_TAG, "scan stop failed, error status = %x", param->scan_stop_cmpl.status);
break;
}
ESP_LOGI(GATTC_TAG, "stop scan successfully");
break;
case ESP_GAP_BLE_ADV_STOP_COMPLETE_EVT:
if (param->adv_stop_cmpl.status != ESP_BT_STATUS_SUCCESS){
ESP_LOGE(GATTC_TAG, "adv stop failed, error status = %x", param->adv_stop_cmpl.status);
break;
}
ESP_LOGI(GATTC_TAG, "stop adv successfully");
break;
default:
break;
}
}
static void esp_gattc_cb(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if, esp_ble_gattc_cb_param_t *param)
{
ESP_LOGI(GATTC_TAG, "EVT %d, gattc if %d", event, gattc_if);
/* If event is register event, store the gattc_if for each profile */
if (event == ESP_GATTC_REG_EVT) {
if (param->reg.status == ESP_GATT_OK) {
gl_profile_tab[param->reg.app_id].gattc_if = gattc_if;
} else {
ESP_LOGI(GATTC_TAG, "reg app failed, app_id %04x, status %d",
param->reg.app_id,
param->reg.status);
return;
}
}
/* If the gattc_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 (gattc_if == ESP_GATT_IF_NONE || /* ESP_GATT_IF_NONE, not specify a certain gatt_if, need to call every profile cb function */
gattc_if == gl_profile_tab[idx].gattc_if) {
if (gl_profile_tab[idx].gattc_cb) {
gl_profile_tab[idx].gattc_cb(event, gattc_if, param);
}
}
}
} while (0);
}
void app_main()
{
// Initialize NVS.
esp_err_t ret = nvs_flash_init();
if (ret == ESP_ERR_NVS_NO_FREE_PAGES) {
ESP_ERROR_CHECK(nvs_flash_erase());
ret = nvs_flash_init();
}
ESP_ERROR_CHECK( ret );
esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
ret = esp_bt_controller_init(&bt_cfg);
if (ret) {
ESP_LOGE(GATTC_TAG, "%s initialize controller failed, error code = %x\n", __func__, ret);
return;
}
ret = esp_bt_controller_enable(ESP_BT_MODE_BTDM);
if (ret) {
ESP_LOGE(GATTC_TAG, "%s enable controller failed, error code = %x\n", __func__, ret);
return;
}
ret = esp_bluedroid_init();
if (ret) {
ESP_LOGE(GATTC_TAG, "%s init bluetooth failed, error code = %x\n", __func__, ret);
return;
}
ret = esp_bluedroid_enable();
if (ret) {
ESP_LOGE(GATTC_TAG, "%s enable bluetooth failed, error code = %x\n", __func__, ret);
return;
}
//register the callback function to the gap module
ret = esp_ble_gap_register_callback(esp_gap_cb);
if (ret){
ESP_LOGE(GATTC_TAG, "%s gap register failed, error code = %x\n", __func__, ret);
return;
}
//register the callback function to the gattc module
ret = esp_ble_gattc_register_callback(esp_gattc_cb);
if(ret){
ESP_LOGE(GATTC_TAG, "%s gattc register failed, error code = %x\n", __func__, ret);
return;
}
ret = esp_ble_gattc_app_register(PROFILE_A_APP_ID);
if (ret){
ESP_LOGE(GATTC_TAG, "%s gattc app register failed, error code = %x\n", __func__, ret);
}
}
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