First I initialize wifi, second mqtt client, and then the bluetooth in order to read an itag's ble address and send that address to a mqtt broker. However after initializing the mqtt client I got this message:
E (3324) BT: bta_gattc_co_cache_addr_init, Line = 333, nvs flash get blob data fail, err_code = 110c
Code: Select all
/*
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 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.
*
****************************************************************************/
/*
#ifndef BTM_INITIAL_TRACE_LEVEL
#define BTM_INITIAL_TRACE_LEVEL BT_TRACE_LEVEL_DEBUG
#endif
#ifndef L2CAP_INITIAL_TRACE_LEVEL
#define L2CAP_INITIAL_TRACE_LEVEL BT_TRACE_LEVEL_DEBUG
#endif
#ifndef GATT_INITIAL_TRACE_LEVEL
#define GATT_INITIAL_TRACE_LEVEL BT_TRACE_LEVEL_DEBUG
#endif
*/
#include <stdint.h>
#include <string.h>
#include <stdbool.h>
#include <stdio.h>
#include "nvs.h"
#include "nvs_flash.h"
#include "controller.h"
#include "esp_bt.h"
#include "esp_gap_ble_api.h"
#include "esp_gattc_api.h"
#include "esp_gatt_defs.h"
#include "esp_bt_main.h"
#include "esp_gatt_common_api.h"
//Wifi Section
#include "esp_wifi.h"
#include "esp_system.h"
#include "esp_event_loop.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "freertos/queue.h"
#include "freertos/event_groups.h"
#include "lwip/sockets.h"
#include "lwip/dns.h"
#include "lwip/netdb.h"
#include "esp_log.h"
#include "mqtt_client.h"
static EventGroupHandle_t wifi_event_group;
const static int CONNECTED_BIT = BIT0;
static const char *MQTT_TAG = "MQTTS";
static const char *WIFI_TAG = "WiFi";
static esp_err_t wifi_event_handler(void *ctx, system_event_t *event)
{
switch (event->event_id) {
case SYSTEM_EVENT_STA_START:
esp_wifi_connect();
break;
case SYSTEM_EVENT_STA_GOT_IP:
xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
break;
case SYSTEM_EVENT_STA_DISCONNECTED:
esp_wifi_connect();
xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
break;
default:
break;
}
return ESP_OK;
}
static void wifi_init(void)
{
tcpip_adapter_init();
wifi_event_group = xEventGroupCreate();
ESP_ERROR_CHECK(esp_event_loop_init(wifi_event_handler, NULL));
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM));
wifi_config_t wifi_config = {
.sta = {
.ssid = "Raspberrypi", //borch
.password = "XXX", //borch
},
};
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));
ESP_LOGI(WIFI_TAG, "start the WIFI SSID:[%s] password:[%s]", "Raspberrypi", "******");
ESP_ERROR_CHECK(esp_wifi_start());
ESP_LOGI(WIFI_TAG, "Waiting for wifi");
xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT, false, true, portMAX_DELAY);
}
//End Wifi Section
//mqtt section starts here
static esp_err_t mqtt_event_handler(esp_mqtt_event_handle_t event)
{
esp_mqtt_client_handle_t mqtt_client = event->client;
int msg_id;
// your_context_t *context = event->context;
switch (event->event_id) {
case MQTT_EVENT_CONNECTED:
ESP_LOGI(MQTT_TAG, "MQTT_EVENT_CONNECTED");
msg_id = esp_mqtt_client_subscribe(mqtt_client, "esp32/ble", 0);
ESP_LOGI(MQTT_TAG, "sent subscribe successful, msg_id=%d", msg_id);
//msg_id = esp_mqtt_client_subscribe(mqtt_client, "/topic/qos1", 1);
//ESP_LOGI(MQTT_TAG, "sent subscribe successful, msg_id=%d", msg_id);
//msg_id = esp_mqtt_client_unsubscribe(mqtt_client, "/topic/qos1");
//ESP_LOGI(MQTT_TAG, "sent unsubscribe successful, msg_id=%d", msg_id);
break;
case MQTT_EVENT_DISCONNECTED:
ESP_LOGI(MQTT_TAG, "MQTT_EVENT_DISCONNECTED");
break;
case MQTT_EVENT_SUBSCRIBED:
ESP_LOGI(MQTT_TAG, "MQTT_EVENT_SUBSCRIBED, msg_id=%d", event->msg_id);
msg_id = esp_mqtt_client_publish(mqtt_client, "esp32/ble", "data from esp32 gatt wifi mqtt_ssl example", 0, 0, 0);
ESP_LOGI(MQTT_TAG, "sent publish successful, msg_id=%d", msg_id);
break;
case MQTT_EVENT_UNSUBSCRIBED:
ESP_LOGI(MQTT_TAG, "MQTT_EVENT_UNSUBSCRIBED, msg_id=%d", event->msg_id);
break;
case MQTT_EVENT_PUBLISHED:
ESP_LOGI(MQTT_TAG, "MQTT_EVENT_PUBLISHED, msg_id=%d", event->msg_id);
break;
case MQTT_EVENT_DATA:
ESP_LOGI(MQTT_TAG, "MQTT_EVENT_DATA");
printf("TOPIC=%.*s\r\n", event->topic_len, event->topic);
printf("DATA=%.*s\r\n", event->data_len, event->data);
break;
case MQTT_EVENT_ERROR:
ESP_LOGI(MQTT_TAG, "MQTT_EVENT_ERROR");
break;
}
return ESP_OK;
}
const char* raspberrypi_pem=\
//next server certificate of my raspberrypi 192_mqtt_srv.crt
"-----BEGIN CERTIFICATE-----\n"\
"MIIDlDCCAnwCCQDokqMaDCZuYzANBgkqhkiG9w0BAQsFADCBizELMAkGA1UEBhMC\n"\
"/wNyf821mrUkNOqo8yH1KN21qJkJQb3hbbmHlEuw2DSKdMAZDTDb7NcH89kYPVWf\n"\
"b+jcOvfgFW8=\n"\
"-----END CERTIFICATE-----\n"\
//next server key from my pi 192_mqtt_server.key
"-----BEGIN RSA PRIVATE KEY-----\n"\
"MIIEogIBAAKCAQEAxnBrr2URRKS4qTlBW1nq4hW3/DOC51ukUZVKCg4w8B8uhWgB\n"\
"
"vm4b5eTD59jUGQMMT66wiSUc0VaPeFkWZc6H48aLBkih0QljoMGA5udejXCZoMIU\n"\
"xtg+Elmrwp+6Li/BjtpLie+xJYHWFRwqk+NupXzLiIz/F+VULtY=\n"\
"-----END RSA PRIVATE KEY-----\n"\
// The Root CA certificate is the last certificate in the list of certificates printed.
//next CA root certificate from my raspberrypi: 192_mqtt_ca.crt
"-----BEGIN CERTIFICATE-----\n" \
"MIID7jCCAtagAwIBAgIJALRpVJTQuFNvMA0GCSqGSIb3DQEBCwUAMIGLMQswCQYD\n"\
"2w3jmt1V5v9HsST/CYoBzAgMe9oylpr7miJF1e1iB3tdNTGqrprZAi+wMWydHTDc\n"\
"do0=\n"\
"-----END CERTIFICATE-----\n";
static void mqtt_app_start(void)
{
const esp_mqtt_client_config_t mqtt_cfg = {
.uri = "mqtts://192.168.0.16:8883", //borch
.event_handle = mqtt_event_handler,
//.cert_pem = (const char *)iot_eclipse_org_pem_start,
.cert_pem = raspberrypi_pem, //borch
.username = "mqtt_user", //borch
.password = "mqtt_pass01", //borch
.client_id = "esp32_gatt_wifi_mqtt_ssl_client", //borch
.transport = MQTT_TRANSPORT_OVER_SSL, //borch
};
ESP_LOGI(MQTT_TAG, "[APP] Free memory: %d bytes", esp_get_free_heap_size());
esp_mqtt_client_handle_t mqtt_client = esp_mqtt_client_init(&mqtt_cfg);
esp_mqtt_client_start(mqtt_client);
}
// end mqtt section
#define GATTC_TAG "GATTC_DEMO"
#define REMOTE_SERVICE_UUID 0x180F //iTAG battery service
#define REMOTE_NOTIFY_CHAR_UUID 0x2A19 //battery level characteristic
#define PROFILE_NUM 1
#define PROFILE_A_APP_ID 0
#define INVALID_HANDLE 0
//static const char remote_device_name[] = "ESP_GATTS_DEMO";
static const char remote_device_name[] = "iTAG"; //borch
static bool conn = false;
static bool get_server = false;
static esp_gattc_char_elem_t *char_elem_result = NULL;
static esp_gattc_descr_elem_t *descr_elem_result = NULL;
/* eclare 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);
//Wifi Section
//End Wifi Section
static esp_bt_uuid_t remote_filter_service_uuid = {
.len = ESP_UUID_LEN_16,
.uuid = {.uuid16 = REMOTE_SERVICE_UUID,},
};
static esp_bt_uuid_t remote_filter_char_uuid = {
.len = ESP_UUID_LEN_16,
.uuid = {.uuid16 = REMOTE_NOTIFY_CHAR_UUID,},
};
static esp_bt_uuid_t notify_descr_uuid = {
.len = ESP_UUID_LEN_16,
.uuid = {.uuid16 = ESP_GATT_UUID_CHAR_CLIENT_CONFIG,},
};
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
};
struct gattc_profile_inst {
esp_gattc_cb_t gattc_cb;
uint16_t gattc_if;
uint16_t app_id;
uint16_t conn_id;
uint16_t service_start_handle;
uint16_t service_end_handle;
uint16_t char_handle;
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)
{
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:{
ESP_LOGI(GATTC_TAG, "ESP_GATTC_CONNECT_EVT conn_id %d, if %d", p_data->connect.conn_id, gattc_if);
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_send_mtu_req (gattc_if, p_data->connect.conn_id);
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_LOGI(GATTC_TAG, "ESP_GATTC_SEARCH_RES_EVT");
esp_gatt_srvc_id_t *srvc_id =(esp_gatt_srvc_id_t *)&p_data->search_res.srvc_id;
if (srvc_id->id.uuid.len == ESP_UUID_LEN_16 && srvc_id->id.uuid.uuid.uuid16 == REMOTE_SERVICE_UUID) {
ESP_LOGI(GATTC_TAG, "service found");
get_server = true;
gl_profile_tab[PROFILE_A_APP_ID].service_start_handle = p_data->search_res.start_handle;
gl_profile_tab[PROFILE_A_APP_ID].service_end_handle = p_data->search_res.end_handle;
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;
}
ESP_LOGI(GATTC_TAG, "ESP_GATTC_SEARCH_CMPL_EVT");
if (get_server){
uint16_t count = 0;
esp_gatt_status_t status = esp_ble_gattc_get_attr_count( gattc_if,
p_data->search_cmpl.conn_id,
ESP_GATT_DB_CHARACTERISTIC,
gl_profile_tab[PROFILE_A_APP_ID].service_start_handle,
gl_profile_tab[PROFILE_A_APP_ID].service_end_handle,
INVALID_HANDLE,
&count);
if (status != ESP_GATT_OK){
ESP_LOGE(GATTC_TAG, "esp_ble_gattc_get_attr_count error");
}
ESP_LOGI(GATTC_TAG, "attr count: %d\n",count);
if (count > 0){
char_elem_result = (esp_gattc_char_elem_t *)malloc(sizeof(esp_gattc_char_elem_t) * count);
if (!char_elem_result){
ESP_LOGE(GATTC_TAG, "gattc no mem");
}else{
status = esp_ble_gattc_get_char_by_uuid( gattc_if,
p_data->search_cmpl.conn_id,
gl_profile_tab[PROFILE_A_APP_ID].service_start_handle,
gl_profile_tab[PROFILE_A_APP_ID].service_end_handle,
remote_filter_char_uuid,
char_elem_result,
&count);
if (status != ESP_GATT_OK){
ESP_LOGE(GATTC_TAG, "esp_ble_gattc_get_char_by_uuid error");
}
/* Every service have only one char in our 'ESP_GATTS_DEMO' demo, so we used first 'char_elem_result' */
if (count > 0 && (char_elem_result[0].properties & ESP_GATT_CHAR_PROP_BIT_NOTIFY)){
ESP_LOGI(GATTC_TAG, "char count: %d\n",count);
gl_profile_tab[PROFILE_A_APP_ID].char_handle = char_elem_result[0].char_handle;
esp_ble_gattc_read_char(gattc_if,p_data->search_cmpl.conn_id,gl_profile_tab[PROFILE_A_APP_ID].char_handle,ESP_GATT_AUTH_REQ_NONE);
//esp_ble_gattc_register_for_notify (gattc_if, gl_profile_tab[PROFILE_A_APP_ID].remote_bda, char_elem_result[0].char_handle);
}
}
/* free char_elem_result */
free(char_elem_result);
}else{
ESP_LOGE(GATTC_TAG, "no char found");
}
}
break;
case ESP_GATTC_READ_CHAR_EVT: {
ESP_LOGI(GATTC_TAG, "ESP_GATTC_READ_CHAR_EVT");
const char *char_pointer = (char*)p_data->read.value; //p_data->read.value: p_data is pointer of union type esp_ble_gattc_cb_param_t
//for accesing the read struc we need to use p_data->read.value sintaxis.
//read member is a struct of type gattc_read_char_evt_param.
//https://github.com/espressif/esp-idf/blob/a255622/components/bt/bluedroid/api/include/api/esp_gattc_api.h
//https://stackoverflow.com/questions/16804650/accessing-c-union-members-via-pointers
//https://www.tutorialspoint.com/cprogramming/c_unions.htm
// p_data->read.value is a pointer to unit8_t type.
//We need to convert from *unit8_t to *char https://stackoverflow.com/questions/12296984/c-uint8-datatype-conversion-to-const-char-datatype
//When we have the pointer to char, we need to cast it int in order to read the numerical value of the iTag.
//For example, p_data->read.value returns 'c' = 0x63 = 99
int battery_percentage = (int)*char_pointer;
ESP_LOGI(GATTC_TAG, "(p_data->read.value) Battery level: %d %%",battery_percentage); //https://stackoverflow.com/questions/1860159/how-to-escape-the-percent-sign-in-cs-printf
ESP_LOGI(GATTC_TAG, "p_data->read.value_len %d",p_data->read.value_len);
//int battery_percentage = atoi((const char*) p_data->read.value);
//int battery_percentage = strtol((const char*)p_data->read.value, NULL, 10);
//printf("Battery Level: %d ",battery_percentage);
break;
}
case ESP_GATTC_REG_FOR_NOTIFY_EVT: {
ESP_LOGI(GATTC_TAG, "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);
}else{
uint16_t count = 0;
uint16_t notify_en = 1;
esp_gatt_status_t ret_status = esp_ble_gattc_get_attr_count( gattc_if,
gl_profile_tab[PROFILE_A_APP_ID].conn_id,
ESP_GATT_DB_DESCRIPTOR,
gl_profile_tab[PROFILE_A_APP_ID].service_start_handle,
gl_profile_tab[PROFILE_A_APP_ID].service_end_handle,
gl_profile_tab[PROFILE_A_APP_ID].char_handle,
&count);
if (ret_status != ESP_GATT_OK){
ESP_LOGE(GATTC_TAG, "esp_ble_gattc_get_attr_count error");
}
ESP_LOGI(GATTC_TAG, "desc count: %d\n",count);
if (count > 0){
descr_elem_result = malloc(sizeof(esp_gattc_descr_elem_t) * count);
if (!descr_elem_result){
ESP_LOGE(GATTC_TAG, "malloc error, gattc no mem");
}else{
ret_status = esp_ble_gattc_get_descr_by_char_handle( gattc_if,
gl_profile_tab[PROFILE_A_APP_ID].conn_id,
p_data->reg_for_notify.handle,
notify_descr_uuid,
descr_elem_result,
&count);
if (ret_status != ESP_GATT_OK){
ESP_LOGE(GATTC_TAG, "esp_ble_gattc_get_descr_by_char_handle error");
}
/* Every char has only one descriptor in our 'ESP_GATTS_DEMO' demo, so we used first 'descr_elem_result' */
if (count > 0 && descr_elem_result[0].uuid.len == ESP_UUID_LEN_16 && descr_elem_result[0].uuid.uuid.uuid16 == ESP_GATT_UUID_CHAR_CLIENT_CONFIG){
ret_status = esp_ble_gattc_write_char_descr( gattc_if,
gl_profile_tab[PROFILE_A_APP_ID].conn_id,
descr_elem_result[0].handle,
sizeof(notify_en),
(uint8_t *)¬ify_en,
ESP_GATT_WRITE_TYPE_RSP,
ESP_GATT_AUTH_REQ_NONE);
}
if (ret_status != ESP_GATT_OK){
ESP_LOGE(GATTC_TAG, "esp_ble_gattc_write_char_descr error");
}
/* free descr_elem_result */
free(descr_elem_result);
}
}
else{
ESP_LOGE(GATTC_TAG, "decsr not found");
}
}
break;
}
case ESP_GATTC_NOTIFY_EVT:
if (p_data->notify.is_notify){
ESP_LOGI(GATTC_TAG, "ESP_GATTC_NOTIFY_EVT, receive notify value:");
}else{
ESP_LOGI(GATTC_TAG, "ESP_GATTC_NOTIFY_EVT, receive indicate value:");
}
esp_log_buffer_hex(GATTC_TAG, p_data->notify.value, p_data->notify.value_len);
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 ");
uint8_t write_char_data[35];
for (int i = 0; i < sizeof(write_char_data); ++i)
{
write_char_data[i] = i % 256;
}
esp_ble_gattc_write_char( gattc_if,
gl_profile_tab[PROFILE_A_APP_ID].conn_id,
gl_profile_tab[PROFILE_A_APP_ID].char_handle,
sizeof(write_char_data),
write_char_data,
ESP_GATT_WRITE_TYPE_RSP,
ESP_GATT_AUTH_REQ_NONE);
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:
conn = false;
get_server = false;
ESP_LOGI(GATTC_TAG, "ESP_GATTC_DISCONNECT_EVT, reason = %d", p_data->disconnect.reason);
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) {
char adv_name_nospaces[strlen(remote_device_name)];
int i,j;
for ( i = 0, j = 0; i<strlen((const char*)adv_name);i++,j++) {
if (adv_name[i] != ' ')
adv_name_nospaces[j]=adv_name[i];
else
j--;
}
adv_name_nospaces[j]=0;
ESP_LOGI(GATTC_TAG, "remote_device_name: %s | remote_device_name len: %d\n", remote_device_name,strlen(remote_device_name));
ESP_LOGI(GATTC_TAG, "adv_name_nospaces: %s | adv_name_nospaces len: %d\n", adv_name_nospaces,strlen(adv_name_nospaces));
//if (strlen(remote_device_name) == adv_name_len && strncmp((char *)adv_name, remote_device_name, adv_name_len) == 0) {
if ( strncmp(adv_name_nospaces, remote_device_name, strlen(adv_name_nospaces)) == 0 ) {
ESP_LOGI(GATTC_TAG, "searched device %s\n", remote_device_name);
if (conn == false) {
conn = 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, scan_result->scan_rst.ble_addr_type, 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;
case ESP_GAP_BLE_UPDATE_CONN_PARAMS_EVT:
ESP_LOGI(GATTC_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;
}
}
static void esp_gattc_cb(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if, esp_ble_gattc_cb_param_t *param)
{
/* 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()
{
ESP_LOGI("Startup", "[APP] Startup..");
ESP_LOGI("Startup", "[APP] Free memory: %d bytes", esp_get_free_heap_size());
ESP_LOGI("Startup", "[APP] IDF version: %s", esp_get_idf_version());
esp_log_level_set("*", ESP_LOG_INFO);
esp_log_level_set("MQTT_CLIENT", ESP_LOG_VERBOSE);
esp_log_level_set("TRANSPORT_TCP", ESP_LOG_VERBOSE);
esp_log_level_set("TRANSPORT_SSL", ESP_LOG_VERBOSE);
esp_log_level_set("TRANSPORT", ESP_LOG_VERBOSE);
esp_log_level_set("OUTBOX", ESP_LOG_VERBOSE);
// 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 );
// Wifi section
wifi_init();
// End Wifi section
//mqtt start function
mqtt_app_start();
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(GATTC_TAG, "%s initialize controller failed: %s\n", __func__, esp_err_to_name(ret));
return;
}
ret = esp_bt_controller_enable(ESP_BT_MODE_BLE);
if (ret) {
ESP_LOGE(GATTC_TAG, "%s enable controller failed: %s\n", __func__, esp_err_to_name(ret));
return;
}
ret = esp_bluedroid_init();
if (ret) {
ESP_LOGE(GATTC_TAG, "%s init bluetooth failed: %s\n", __func__, esp_err_to_name(ret));
return;
}
ret = esp_bluedroid_enable();
if (ret) {
ESP_LOGE(GATTC_TAG, "%s enable bluetooth failed: %s\n", __func__, esp_err_to_name(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);
}
esp_err_t local_mtu_ret = esp_ble_gatt_set_local_mtu(500);
if (local_mtu_ret){
ESP_LOGE(GATTC_TAG, "set local MTU failed, error code = %x", local_mtu_ret);
}
}