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OVMS3-idf/examples/bluetooth/gatt_client/main/gattc_demo.c

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// Copyright 2015-2016 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,
*
****************************************************************************/
#include <stdint.h>
#include <string.h>
#include <stdbool.h>
#include <stdio.h>
#include "controller.h"
#include "bt.h"
#include "bt_trace.h"
#include "bt_types.h"
#include "btm_api.h"
#include "bta_api.h"
#include "bta_gatt_api.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"
///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_a_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if, esp_ble_gattc_cb_param_t *param);
static void gattc_profile_b_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 alert_service_id = {
.id = {
.uuid = {
.len = ESP_UUID_LEN_16,
.uuid = {.uuid16 = 0x1811,},
},
.inst_id = 0,
},
.is_primary = true,
};
static esp_gatt_id_t notify_descr_id = {
.uuid = {
.len = ESP_UUID_LEN_16,
.uuid = {.uuid16 = GATT_UUID_CHAR_CLIENT_CONFIG,},
},
.inst_id = 0,
};
#define BT_BD_ADDR_STR "%02x:%02x:%02x:%02x:%02x:%02x"
#define BT_BD_ADDR_HEX(addr) addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]
static bool connect = false;
static const char device_name[] = "Alert Notification";
static esp_ble_scan_params_t ble_scan_params = {
.scan_type = BLE_SCAN_TYPE_ACTIVE,
.own_addr_type = ESP_PUBLIC_ADDR,
.scan_filter_policy = BLE_SCAN_FILTER_ALLOW_ALL,
.scan_interval = 0x50,
.scan_window = 0x30
};
#define PROFILE_NUM 2
#define PROFILE_A_APP_ID 0
#define PROFILE_B_APP_ID 1
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_a_event_handler,
.gattc_if = ESP_GATT_IF_NONE, /* Not get the gatt_if, so initial is ESP_GATT_IF_NONE */
},
[PROFILE_B_APP_ID] = {
.gattc_cb = gattc_profile_b_event_handler,
.gattc_if = ESP_GATT_IF_NONE, /* Not get the gatt_if, so initial is ESP_GATT_IF_NONE */
},
};
static void gattc_profile_a_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\n");
esp_ble_gap_set_scan_params(&ble_scan_params);
break;
case ESP_GATTC_OPEN_EVT:
conn_id = p_data->open.conn_id;
memcpy(gl_profile_tab[PROFILE_A_APP_ID].remote_bda, p_data->open.remote_bda, sizeof(esp_bd_addr_t));
ESP_LOGI(GATTC_TAG, "ESP_GATTC_OPEN_EVT conn_id %d, if %d, status %d, mtu %d\n", conn_id, gattc_if, p_data->open.status, p_data->open.mtu);
ESP_LOGI(GATTC_TAG, "REMOTE BDA %02x:%02x:%02x:%02x:%02x:%02x\n",
gl_profile_tab[PROFILE_A_APP_ID].remote_bda[0], gl_profile_tab[PROFILE_A_APP_ID].remote_bda[1],
gl_profile_tab[PROFILE_A_APP_ID].remote_bda[2], gl_profile_tab[PROFILE_A_APP_ID].remote_bda[3],
gl_profile_tab[PROFILE_A_APP_ID].remote_bda[4], gl_profile_tab[PROFILE_A_APP_ID].remote_bda[5]
);
esp_ble_gattc_search_service(gattc_if, conn_id, NULL);
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;
ESP_LOGI(GATTC_TAG, "SEARCH RES: conn_id = %x\n", conn_id);
if (srvc_id->id.uuid.len == ESP_UUID_LEN_16) {
ESP_LOGI(GATTC_TAG, "UUID16: %x\n", srvc_id->id.uuid.uuid.uuid16);
} else if (srvc_id->id.uuid.len == ESP_UUID_LEN_32) {
ESP_LOGI(GATTC_TAG, "UUID32: %x\n", srvc_id->id.uuid.uuid.uuid32);
} else if (srvc_id->id.uuid.len == ESP_UUID_LEN_128) {
ESP_LOGI(GATTC_TAG, "UUID128: %x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x\n", srvc_id->id.uuid.uuid.uuid128[0],
srvc_id->id.uuid.uuid.uuid128[1], srvc_id->id.uuid.uuid.uuid128[2], srvc_id->id.uuid.uuid.uuid128[3],
srvc_id->id.uuid.uuid.uuid128[4], srvc_id->id.uuid.uuid.uuid128[5], srvc_id->id.uuid.uuid.uuid128[6],
srvc_id->id.uuid.uuid.uuid128[7], srvc_id->id.uuid.uuid.uuid128[8], srvc_id->id.uuid.uuid.uuid128[9],
srvc_id->id.uuid.uuid.uuid128[10], srvc_id->id.uuid.uuid.uuid128[11], srvc_id->id.uuid.uuid.uuid128[12],
srvc_id->id.uuid.uuid.uuid128[13], srvc_id->id.uuid.uuid.uuid128[14], srvc_id->id.uuid.uuid.uuid128[15]);
} else {
ESP_LOGE(GATTC_TAG, "UNKNOWN LEN %d\n", srvc_id->id.uuid.len);
}
break;
}
case ESP_GATTC_SEARCH_CMPL_EVT:
conn_id = p_data->search_cmpl.conn_id;
ESP_LOGI(GATTC_TAG, "SEARCH_CMPL: conn_id = %x, status %d\n", conn_id, p_data->search_cmpl.status);
esp_ble_gattc_get_characteristic(gattc_if, conn_id, &alert_service_id, NULL);
break;
case ESP_GATTC_GET_CHAR_EVT:
if (p_data->get_char.status != ESP_GATT_OK) {
break;
}
ESP_LOGI(GATTC_TAG, "GET CHAR: conn_id = %x, status %d\n", p_data->get_char.conn_id, p_data->get_char.status);
ESP_LOGI(GATTC_TAG, "GET CHAR: srvc_id = %04x, char_id = %04x\n", 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 == 0x2a46) {
ESP_LOGI(GATTC_TAG, "register notify\n");
esp_ble_gattc_register_for_notify(gattc_if, gl_profile_tab[PROFILE_A_APP_ID].remote_bda, &alert_service_id, &p_data->get_char.char_id);
}
esp_ble_gattc_get_characteristic(gattc_if, conn_id, &alert_service_id, &p_data->get_char.char_id);
break;
case ESP_GATTC_REG_FOR_NOTIFY_EVT: {
uint16_t notify_en = 1;
ESP_LOGI(GATTC_TAG, "REG FOR NOTIFY: status %d\n", p_data->reg_for_notify.status);
ESP_LOGI(GATTC_TAG, "REG FOR_NOTIFY: srvc_id = %04x, char_id = %04x\n", p_data->reg_for_notify.srvc_id.id.uuid.uuid.uuid16, p_data->reg_for_notify.char_id.uuid.uuid.uuid16);
esp_ble_gattc_write_char_descr(
gattc_if,
conn_id,
&alert_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, "NOTIFY: len %d, value %08x\n", p_data->notify.value_len, *(uint32_t *)p_data->notify.value);
break;
case ESP_GATTC_WRITE_DESCR_EVT:
ESP_LOGI(GATTC_TAG, "WRITE: status %d\n", p_data->write.status);
break;
default:
break;
}
}
static void gattc_profile_b_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\n");
break;
case ESP_GATTC_OPEN_EVT:
conn_id = p_data->open.conn_id;
memcpy(gl_profile_tab[PROFILE_B_APP_ID].remote_bda, p_data->open.remote_bda, sizeof(esp_bd_addr_t));
ESP_LOGI(GATTC_TAG, "ESP_GATTC_OPEN_EVT conn_id %d, if %d, status %d, mtu %d\n", conn_id, gattc_if, p_data->open.status, p_data->open.mtu);
ESP_LOGI(GATTC_TAG, "REMOTE BDA %02x:%02x:%02x:%02x:%02x:%02x\n",
gl_profile_tab[PROFILE_B_APP_ID].remote_bda[0], gl_profile_tab[PROFILE_B_APP_ID].remote_bda[1],
gl_profile_tab[PROFILE_B_APP_ID].remote_bda[2], gl_profile_tab[PROFILE_B_APP_ID].remote_bda[3],
gl_profile_tab[PROFILE_B_APP_ID].remote_bda[4], gl_profile_tab[PROFILE_B_APP_ID].remote_bda[5]
);
esp_ble_gattc_search_service(gattc_if, conn_id, NULL);
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;
ESP_LOGI(GATTC_TAG, "SEARCH RES: conn_id = %x\n", conn_id);
if (srvc_id->id.uuid.len == ESP_UUID_LEN_16) {
ESP_LOGI(GATTC_TAG, "UUID16: %x\n", srvc_id->id.uuid.uuid.uuid16);
} else if (srvc_id->id.uuid.len == ESP_UUID_LEN_32) {
ESP_LOGI(GATTC_TAG, "UUID32: %x\n", srvc_id->id.uuid.uuid.uuid32);
} else if (srvc_id->id.uuid.len == ESP_UUID_LEN_128) {
ESP_LOGI(GATTC_TAG, "UUID128: %x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x\n", srvc_id->id.uuid.uuid.uuid128[0],
srvc_id->id.uuid.uuid.uuid128[1], srvc_id->id.uuid.uuid.uuid128[2], srvc_id->id.uuid.uuid.uuid128[3],
srvc_id->id.uuid.uuid.uuid128[4], srvc_id->id.uuid.uuid.uuid128[5], srvc_id->id.uuid.uuid.uuid128[6],
srvc_id->id.uuid.uuid.uuid128[7], srvc_id->id.uuid.uuid.uuid128[8], srvc_id->id.uuid.uuid.uuid128[9],
srvc_id->id.uuid.uuid.uuid128[10], srvc_id->id.uuid.uuid.uuid128[11], srvc_id->id.uuid.uuid.uuid128[12],
srvc_id->id.uuid.uuid.uuid128[13], srvc_id->id.uuid.uuid.uuid128[14], srvc_id->id.uuid.uuid.uuid128[15]);
} else {
ESP_LOGE(GATTC_TAG, "UNKNOWN LEN %d\n", srvc_id->id.uuid.len);
}
break;
}
case ESP_GATTC_SEARCH_CMPL_EVT:
conn_id = p_data->search_cmpl.conn_id;
ESP_LOGI(GATTC_TAG, "SEARCH_CMPL: conn_id = %x, status %d\n", conn_id, p_data->search_cmpl.status);
esp_ble_gattc_get_characteristic(gattc_if, conn_id, &alert_service_id, NULL);
break;
case ESP_GATTC_GET_CHAR_EVT:
if (p_data->get_char.status != ESP_GATT_OK) {
break;
}
ESP_LOGI(GATTC_TAG, "GET CHAR: conn_id = %x, status %d\n", p_data->get_char.conn_id, p_data->get_char.status);
ESP_LOGI(GATTC_TAG, "GET CHAR: srvc_id = %04x, char_id = %04x\n", 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 == 0x2a46) {
ESP_LOGI(GATTC_TAG, "register notify\n");
esp_ble_gattc_register_for_notify(gattc_if, gl_profile_tab[PROFILE_B_APP_ID].remote_bda, &alert_service_id, &p_data->get_char.char_id);
}
esp_ble_gattc_get_characteristic(gattc_if, conn_id, &alert_service_id, &p_data->get_char.char_id);
break;
case ESP_GATTC_REG_FOR_NOTIFY_EVT: {
uint16_t notify_en = 1;
ESP_LOGI(GATTC_TAG, "REG FOR NOTIFY: status %d\n", p_data->reg_for_notify.status);
ESP_LOGI(GATTC_TAG, "REG FOR_NOTIFY: srvc_id = %04x, char_id = %04x\n", p_data->reg_for_notify.srvc_id.id.uuid.uuid.uuid16, p_data->reg_for_notify.char_id.uuid.uuid.uuid16);
esp_ble_gattc_write_char_descr(
gattc_if,
conn_id,
&alert_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, "NOTIFY: len %d, value %08x\n", p_data->notify.value_len, *(uint32_t *)p_data->notify.value);
break;
case ESP_GATTC_WRITE_DESCR_EVT:
ESP_LOGI(GATTC_TAG, "WRITE: status %d\n", p_data->write.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 = 10;
esp_ble_gap_start_scanning(duration);
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:
for (int i = 0; i < 6; i++) {
ESP_LOGI(GATTC_TAG, "%x:", scan_result->scan_rst.bda[i]);
}
ESP_LOGI(GATTC_TAG, "\n");
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\n", adv_name_len);
for (int j = 0; j < adv_name_len; j++) {
ESP_LOGI(GATTC_TAG, "%c", adv_name[j]);
}
if (adv_name != NULL) {
if (strcmp((char *)adv_name, device_name) == 0) {
ESP_LOGI(GATTC_TAG, "Searched device %s\n", device_name);
if (connect == false) {
connect = true;
ESP_LOGI(GATTC_TAG, "Connect to the remote device.\n");
esp_ble_gap_stop_scanning();
esp_ble_gattc_open(gl_profile_tab[PROFILE_A_APP_ID].gattc_if, scan_result->scan_rst.bda, true);
esp_ble_gattc_open(gl_profile_tab[PROFILE_B_APP_ID].gattc_if, scan_result->scan_rst.bda, true);
}
}
}
break;
case ESP_GAP_SEARCH_INQ_CMPL_EVT:
break;
default:
break;
}
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\n", 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\n",
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 ble_client_appRegister(void)
{
esp_err_t status;
ESP_LOGI(GATTC_TAG, "register callback\n");
//register the scan callback function to the gap moudule
if ((status = esp_ble_gap_register_callback(esp_gap_cb)) != ESP_OK) {
ESP_LOGE(GATTC_TAG, "gap register error, error code = %x\n", status);
return;
}
//register the callback function to the gattc module
if ((status = esp_ble_gattc_register_callback(esp_gattc_cb)) != ESP_OK) {
ESP_LOGE(GATTC_TAG, "gattc register error, error code = %x\n", status);
return;
}
esp_ble_gattc_app_register(PROFILE_A_APP_ID);
esp_ble_gattc_app_register(PROFILE_B_APP_ID);
}
void gattc_client_test(void)
{
esp_bluedroid_init();
esp_bluedroid_enable();
ble_client_appRegister();
}
void app_main()
{
esp_bt_controller_init();
gattc_client_test();
}
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