Read BLE characteristic from Battery Service as gatt client
Posted: Mon May 21, 2018 2:37 pm
Hi,
I'm trying to connect and read characteristics of BLE Battery Service:
https://www.bluetooth.com/specification ... ervice.xml
ESP32 is running as gatt CLIENT, and gatt SERVER is nRF52840 with default Heart Rate example
http://infocenter.nordicsemi.com/topic/ ... 0_4_1_2_13
There are 3 services (Battery Service, Device Information and Heart Rate).
Here is how it looks like through BLE Monitor:
Problem:
Now I'm trying to read at least Battery Service.
I got next error and I dont know how to handle it, why connection is unknown?
BT: bta_gattc_cmpl_cback unknown conn_id = 1, ignore data
After that I got disconnect from nRF52 with some timeout reason.
Full log:
Here is my code:
And at pastebin:
https://pastebin.com/k6Wm2tLM
I'm trying to connect and read characteristics of BLE Battery Service:
https://www.bluetooth.com/specification ... ervice.xml
ESP32 is running as gatt CLIENT, and gatt SERVER is nRF52840 with default Heart Rate example
http://infocenter.nordicsemi.com/topic/ ... 0_4_1_2_13
There are 3 services (Battery Service, Device Information and Heart Rate).
Here is how it looks like through BLE Monitor:
- HRM example
- esp32_nordic.jpg (210.25 KiB) Viewed 4100 times
Now I'm trying to read at least Battery Service.
I got next error and I dont know how to handle it, why connection is unknown?
BT: bta_gattc_cmpl_cback unknown conn_id = 1, ignore data
After that I got disconnect from nRF52 with some timeout reason.
Full log:
Code: Select all
[2018-05-21_16:54:46]ะท ets Jun 8 2016 00:22:57
[2018-05-21_16:54:47]rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
[2018-05-21_16:54:47]ets Jun 8 2016 00:22:57
[2018-05-21_16:54:47]rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
[2018-05-21_16:54:47]configsip: 0, SPIWP:0xee
[2018-05-21_16:54:47]clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
[2018-05-21_16:54:47]mode:DIO, clock div:2
[2018-05-21_16:54:47]load:0x3fff0018,len:4
[2018-05-21_16:54:47]load:0x3fff001c,len:5672
[2018-05-21_16:54:47]load:0x40078000,len:0
[2018-05-21_16:54:47]ho 12 tail 0 room 4
[2018-05-21_16:54:47]load:0x40078000,len:13912
[2018-05-21_16:54:47]entry 0x40078fd8
[2018-05-21_16:54:47][0;32mI (31) boot: ESP-IDF v3.1-dev-578-g9ea38560 2nd stage bootloader[0m
[2018-05-21_16:54:47][0;32mI (31) boot: compile time 19:20:37[0m
[2018-05-21_16:54:47][0;32mI (31) boot: Enabling RNG early entropy source...[0m
[2018-05-21_16:54:47][0;32mI (37) boot: SPI Speed : 40MHz[0m
[2018-05-21_16:54:47][0;32mI (41) boot: SPI Mode : DIO[0m
[2018-05-21_16:54:47][0;32mI (45) boot: SPI Flash Size : 4MB[0m
[2018-05-21_16:54:47][0;32mI (49) boot: Partition Table:[0m
[2018-05-21_16:54:47][0;32mI (52) boot: ## Label Usage Type ST Offset Length[0m
[2018-05-21_16:54:47][0;32mI (60) boot: 0 nvs WiFi data 01 02 00009000 00006000[0m
[2018-05-21_16:54:47][0;32mI (67) boot: 1 phy_init RF data 01 01 0000f000 00001000[0m
[2018-05-21_16:54:47][0;32mI (75) boot: 2 factory factory app 00 00 00010000 00200000[0m
[2018-05-21_16:54:47][0;32mI (82) boot: End of partition table[0m
[2018-05-21_16:54:47][0;32mI (86) esp_image: segment 0: paddr=0x00010020 vaddr=0x3f400020 size=0x330ec (209132) map[0m
[2018-05-21_16:54:47][0;32mI (168) esp_image: segment 1: paddr=0x00043114 vaddr=0x3ffc0000 size=0x029d4 ( 10708) load[0m
[2018-05-21_16:54:47][0;32mI (172) esp_image: segment 2: paddr=0x00045af0 vaddr=0x40080000 size=0x00400 ( 1024) load[0m
[2018-05-21_16:54:47][0;32mI (175) esp_image: segment 3: paddr=0x00045ef8 vaddr=0x40080400 size=0x0a118 ( 41240) load[0m
[2018-05-21_16:54:47][0;32mI (200) esp_image: segment 4: paddr=0x00050018 vaddr=0x400d0018 size=0x7f8d4 (522452) map[0m
[2018-05-21_16:54:48][0;32mI (382) esp_image: segment 5: paddr=0x000cf8f4 vaddr=0x4008a518 size=0x035c8 ( 13768) load[0m
[2018-05-21_16:54:48][0;32mI (388) esp_image: segment 6: paddr=0x000d2ec4 vaddr=0x400c0000 size=0x00000 ( 0) load[0m
[2018-05-21_16:54:48][0;32mI (397) boot: Loaded app from partition at offset 0x10000[0m
[2018-05-21_16:54:48][0;32mI (397) boot: Disabling RNG early entropy source...[0m
[2018-05-21_16:54:48][0;32mI (401) cpu_start: Pro cpu up.[0m
[2018-05-21_16:54:48][0;32mI (404) cpu_start: Starting app cpu, entry point is 0x40080f38[0m
[2018-05-21_16:54:48][0;32mI (0) cpu_start: App cpu up.[0m
[2018-05-21_16:54:48][0;32mI (415) heap_init: Initializing. RAM available for dynamic allocation:[0m
[2018-05-21_16:54:48][0;32mI (421) heap_init: At 3FFAFF10 len 000000F0 (0 KiB): DRAM[0m
[2018-05-21_16:54:48][0;32mI (427) heap_init: At 3FFCF258 len 00010DA8 (67 KiB): DRAM[0m
[2018-05-21_16:54:48][0;32mI (434) heap_init: At 3FFE0440 len 00003BC0 (14 KiB): D/IRAM[0m
[2018-05-21_16:54:48][0;32mI (440) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM[0m
[2018-05-21_16:54:48][0;32mI (446) heap_init: At 4008DAE0 len 00012520 (73 KiB): IRAM[0m
[2018-05-21_16:54:48][0;32mI (453) cpu_start: Pro cpu start user code[0m
[2018-05-21_16:54:48][0;32mI (135) cpu_start: Starting scheduler on PRO CPU.[0m
[2018-05-21_16:54:48][0;32mI (0) cpu_start: Starting scheduler on APP CPU.[0m
[2018-05-21_16:54:48][0;32mI (214) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE[0m
[2018-05-21_16:54:48][0;32mI (524) phy: phy_version: 383.0, 79a622c, Jan 30 2018, 15:38:06, 0, 0[0m
[2018-05-21_16:54:48][0;32mI (604) BLE: (battery)REG_EVT[0m
[2018-05-21_16:54:48][0;32mI (614) BLE: scan start success[0m
[2018-05-21_16:54:48][0;32mI (724) BLE: e2 04 59 ac ac a7 [0m
[2018-05-21_16:54:48][0;32mI (724) BLE: searched Adv Data Len 27, Scan Response Len 0[0m
[2018-05-21_16:54:48][0;32mI (724) BLE: searched Device Name Len 10[0m
[2018-05-21_16:54:48][0;32mI (724) BLE: Nordic_HRM[0m
[2018-05-21_16:54:48][0;32mI (734) BLE:
[2018-05-21_16:54:48][0m
[2018-05-21_16:54:48][0;32mI (734) BLE: searched device Nordic_HRM
[2018-05-21_16:54:48][0m
[2018-05-21_16:54:48][0;32mI (734) BLE: connect to the remote device.[0m
[2018-05-21_16:54:48][0;32mI (744) BLE: stop scan successfully[0m
[2018-05-21_16:54:49][0;32mI (1314) BLE: (battery)ESP_GATTC_CONNECT_EVT conn_id 0, if 2[0m
[2018-05-21_16:54:49][0;32mI (1314) BLE: (battery)REMOTE BDA:[0m
[2018-05-21_16:54:49][0;32mI (1314) BLE: e2 04 59 ac ac a7 [0m
[2018-05-21_16:54:49][0;32mI (1314) BLE: (battery)open success[0m
[2018-05-21_16:54:49][0;32mI (1994) BLE: (battery)ESP_GATTC_CFG_MTU_EVT, Status 0, MTU 247, conn_id 0[0m
[2018-05-21_16:54:49][0;32mI (2004) BLE: (battery)service found[0m
[2018-05-21_16:54:49][0;32mI (2004) BLE: (battery)ESP_GATTC_SEARCH_RES_EVT[0m
[2018-05-21_16:54:49][0;32mI (2004) BLE: (battery)srvc_id_len:2 [2][0m
[2018-05-21_16:54:49][0;32mI (2014) BLE: (battery)service found[0m
[2018-05-21_16:54:49][0;32mI (2014) BLE: (battery)UUID16: 180f[0m
[2018-05-21_16:54:49][0;32mI (2014) BLE: (battery)ESP_GATTC_SEARCH_CMPL_EVT[0m
[2018-05-21_16:54:49][0;32mI (2024) BLE: (battery)get_server[0m
[2018-05-21_16:54:49][0;32mI (2024) BLE: (battery)esp_ble_gattc_register_for_notify success[0m
[2018-05-21_16:54:49][0;32mI (2034) BLE: (battery)ESP_GATTC_REG_FOR_NOTIFY_EVT[0m
[2018-05-21_16:54:49][0;32mI (2054) BLE: (battery)ESP_GATTC_READ_DESCR_EVT[0m
[2018-05-21_16:54:49][0;32mI (2064) BLE: (battery)read descr success [0m
[2018-05-21_16:54:49][0;32mI (2064) BLE: (battery) esp_ble_gattc_read_char success [0m
[2018-05-21_16:54:50][0;32mI (2084) BLE: (battery)ESP_GATTC_READ_CHAR_EVT[0m
[2018-05-21_16:54:50][0;32mI (2084) BLE: (battery)read char success [0m
[2018-05-21_16:54:50][0;31mE (2324) BT: bta_gattc_cmpl_cback unknown conn_id = 1, ignore data[0m
[2018-05-21_16:55:19][0;31mE (31324) BT: bta_gattc_conn_cback() - cif=1 connected=0 conn_id=1 reason=0x0013[0m
[2018-05-21_16:55:19][0;31mE (31324) BT: bta_gattc_conn_cback() - cif=2 connected=0 conn_id=2 reason=0x0013[0m
[2018-05-21_16:55:19][0;32mI (31334) BLE: (battery)ESP_GATTC_DISCONNECT_EVT, reason = 19[0m
[2018-05-21_16:55:19][0;32mI (31334) BLE: unregistered EVT:5[0m
Code: Select all
#define BLE_TAG "BLE"
#define DEVICE_NAME "BLE_TEST"
#define REMOTE_SERVICE_UUID 0x00FF
#define REMOTE_NOTIFY_CHAR_UUID 0xFF01
#define REMOTE_BATTERY_SERVICE_UUID 0x180F
#define PROFILE_NUM 1
#define PROFILE_A_APP_ID 0
#define INVALID_HANDLE 0
#define PROFILE_BATTERY_SERVICE 0 // 0x180F
#define PROFILE_DEVICE_INFO 1 // 0x180A
#define PROFILE_HRM 2 // 0x180D
static const char remote_device_name[] = "Nordic_HRM";
static bool connect_ble = 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;
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;
};
/* 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_battery_service_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if, esp_ble_gattc_cb_param_t *param);
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_battery_service_uuid = {
.len = ESP_UUID_LEN_16,
.uuid = {.uuid16 = REMOTE_BATTERY_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 remote_battery_filter_char_uuid = {
.len = ESP_UUID_LEN_16,
.uuid = {.uuid16 = ESP_GATT_UUID_BATTERY_LEVEL,},
};
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
};
/* 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_BATTERY_SERVICE] = {
.gattc_cb = gattc_profile_battery_service_event_handler,
.gattc_if = ESP_GATT_IF_NONE,
},
// [PROFILE_DEVICE_INFO] = {
// .gattc_cb = gattc_profile_device_info_event_handler,
// .gattc_if = ESP_GATT_IF_NONE, /* Not get the gatt_if, so initial is ESP_GATT_IF_NONE */
// },
// [PROFILE_HRM] = {
// .gattc_cb = gattc_profile_hrm_event_handler,
// .gattc_if = ESP_GATT_IF_NONE,
// },
};
static void gattc_profile_battery_service_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(BLE_TAG, "(battery)REG_EVT");
esp_err_t scan_ret = esp_ble_gap_set_scan_params(&ble_scan_params);
if (scan_ret){
ESP_LOGE(BLE_TAG, "(battery)set scan params error, error code = %x", scan_ret);
}
break;
case ESP_GATTC_CONNECT_EVT:{
ESP_LOGI(BLE_TAG, "(battery)ESP_GATTC_CONNECT_EVT conn_id %d, if %d", p_data->connect.conn_id, gattc_if);
gl_profile_tab[PROFILE_BATTERY_SERVICE].conn_id = p_data->connect.conn_id;
memcpy(gl_profile_tab[PROFILE_BATTERY_SERVICE].remote_bda, p_data->connect.remote_bda, sizeof(esp_bd_addr_t));
ESP_LOGI(BLE_TAG, "(battery)REMOTE BDA:");
esp_log_buffer_hex(BLE_TAG, gl_profile_tab[PROFILE_BATTERY_SERVICE].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(BLE_TAG, "(battery)config MTU error, error code = %x", mtu_ret);
}
break;
}
case ESP_GATTC_OPEN_EVT:
if (param->open.status != ESP_GATT_OK){
ESP_LOGE(BLE_TAG, "(battery)open failed, status %d", p_data->open.status);
break;
}
ESP_LOGI(BLE_TAG, "(battery)open success");
break;
case ESP_GATTC_CFG_MTU_EVT:
if (param->cfg_mtu.status != ESP_GATT_OK){
ESP_LOGE(BLE_TAG,"(battery)config mtu failed, error status = %x", param->cfg_mtu.status);
}
ESP_LOGI(BLE_TAG, "(battery)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_err_t ret_search_gatt;
ret_search_gatt = esp_ble_gattc_search_service(gattc_if, param->cfg_mtu.conn_id, &remote_filter_battery_service_uuid); // with filter
//ret_search_gatt = esp_ble_gattc_search_service(gattc_if, param->cfg_mtu.conn_id, NULL);
if(ret_search_gatt){
ESP_LOGI(BLE_TAG, "(battery)service not found, error code = %x", ret_search_gatt);
}else{
ESP_LOGI(BLE_TAG, "(battery)service found");
}
break;
case ESP_GATTC_SEARCH_RES_EVT: {
ESP_LOGI(BLE_TAG, "(battery)ESP_GATTC_SEARCH_RES_EVT");
esp_gatt_srvc_id_t *srvc_id =(esp_gatt_srvc_id_t *)&p_data->search_res.srvc_id;
ESP_LOGI(BLE_TAG, "(battery)srvc_id_len:%d [%x]", srvc_id->id.uuid.len, srvc_id->id.uuid.len);
// for (uint8_t i = 0; i < 15; i++)
// {
// ESP_LOGI(BLE_TAG, "(battery)srvc_id:%d [%x]", i, srvc_id->id.uuid.uuid.uuid128[i]);
// }
if (srvc_id->id.uuid.len == ESP_UUID_LEN_16 && srvc_id->id.uuid.uuid.uuid16 == REMOTE_BATTERY_SERVICE_UUID) {
ESP_LOGI(BLE_TAG, "(battery)service found");
get_server = true;
gl_profile_tab[PROFILE_BATTERY_SERVICE].service_start_handle = p_data->search_res.start_handle;
gl_profile_tab[PROFILE_BATTERY_SERVICE].service_end_handle = p_data->search_res.end_handle;
ESP_LOGI(BLE_TAG, "(battery)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(BLE_TAG, "(battery)search service failed, error status = %x", p_data->search_cmpl.status);
break;
}
ESP_LOGI(BLE_TAG, "(battery)ESP_GATTC_SEARCH_CMPL_EVT");
if (get_server){
ESP_LOGI(BLE_TAG, "(battery)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_BATTERY_SERVICE].service_start_handle,
gl_profile_tab[PROFILE_BATTERY_SERVICE].service_end_handle,
INVALID_HANDLE,
&count);
if (status != ESP_GATT_OK){
ESP_LOGE(BLE_TAG, "(battery)esp_ble_gattc_get_attr_count error");
}
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(BLE_TAG, "(battery)gattc no mem");
}else{
status = esp_ble_gattc_get_char_by_uuid( gattc_if,
p_data->search_cmpl.conn_id,
gl_profile_tab[PROFILE_BATTERY_SERVICE].service_start_handle,
gl_profile_tab[PROFILE_BATTERY_SERVICE].service_end_handle,
remote_battery_filter_char_uuid, //remote_filter_char_uuid,
char_elem_result,
&count);
if (status != ESP_GATT_OK){
ESP_LOGE(BLE_TAG, "(battery)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)){
gl_profile_tab[PROFILE_BATTERY_SERVICE].char_handle = char_elem_result[0].char_handle;
esp_err_t errorcode = esp_ble_gattc_register_for_notify (gattc_if, gl_profile_tab[PROFILE_BATTERY_SERVICE].remote_bda, char_elem_result[0].char_handle);
if(errorcode)
{
ESP_LOGI(BLE_TAG, "(battery)esp_ble_gattc_register_for_notify error, code: %x", errorcode);
}else{
ESP_LOGI(BLE_TAG, "(battery)esp_ble_gattc_register_for_notify success");
}
}
}
/* free char_elem_result */
free(char_elem_result);
}else{
ESP_LOGE(BLE_TAG, "(battery)no char found");
}
}else{
ESP_LOGI(BLE_TAG, "(battery)GATT server not found");
}
break;
case ESP_GATTC_REG_FOR_NOTIFY_EVT: {
ESP_LOGI(BLE_TAG, "(battery)ESP_GATTC_REG_FOR_NOTIFY_EVT");
if (p_data->reg_for_notify.status != ESP_GATT_OK){
ESP_LOGE(BLE_TAG, "(battery)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_BATTERY_SERVICE].conn_id,
ESP_GATT_DB_DESCRIPTOR,
gl_profile_tab[PROFILE_BATTERY_SERVICE].service_start_handle,
gl_profile_tab[PROFILE_BATTERY_SERVICE].service_end_handle,
gl_profile_tab[PROFILE_BATTERY_SERVICE].char_handle,
&count);
if (ret_status != ESP_GATT_OK){
ESP_LOGE(BLE_TAG, "(battery)esp_ble_gattc_get_attr_count error");
}
if (count > 0)
{
descr_elem_result = malloc(sizeof(esp_gattc_descr_elem_t) * count);
if (!descr_elem_result){
ESP_LOGE(BLE_TAG, "(battery)malloc error, gattc no mem");
}else{
ret_status = esp_ble_gattc_get_descr_by_char_handle( gattc_if,
gl_profile_tab[PROFILE_BATTERY_SERVICE].conn_id,
p_data->reg_for_notify.handle,
notify_descr_uuid,
descr_elem_result,
&count);
if (ret_status != ESP_GATT_OK){
ESP_LOGE(BLE_TAG, "(battery)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_BATTERY_SERVICE].conn_id,
// descr_elem_result[0].handle,
// sizeof(notify_en),
// (uint8_t *)¬ify_en,
// ESP_GATT_WRITE_TYPE_RSP,
// ESP_GATT_AUTH_REQ_NONE);
ret_status = esp_ble_gattc_read_char_descr( gattc_if,
gl_profile_tab[PROFILE_BATTERY_SERVICE].conn_id,
descr_elem_result[0].handle,
ESP_GATT_AUTH_REQ_NONE);
}
if (ret_status != ESP_GATT_OK){
//ESP_LOGE(BLE_TAG, "(battery)esp_ble_gattc_write_char_descr error");
ESP_LOGE(BLE_TAG, "(battery)esp_ble_gattc_read_char_descr error, code: %x", ret_status);
}
/* free descr_elem_result */
free(descr_elem_result);
}
}
else{
ESP_LOGE(BLE_TAG, "(battery)decsr not found");
}
}
break;
}
case ESP_GATTC_NOTIFY_EVT:
if (p_data->notify.is_notify){
ESP_LOGI(BLE_TAG, "(battery)ESP_GATTC_NOTIFY_EVT, receive notify value:");
}else{
ESP_LOGI(BLE_TAG, "(battery)ESP_GATTC_NOTIFY_EVT, receive indicate value:");
}
esp_log_buffer_hex(BLE_TAG, p_data->notify.value, p_data->notify.value_len);
break;
case ESP_GATTC_READ_CHAR_EVT:
ESP_LOGI(BLE_TAG, "(battery)ESP_GATTC_READ_CHAR_EVT");
if (p_data->read.status != ESP_GATT_OK){
ESP_LOGE(BLE_TAG, "(battery)read char failed, error status = %x", p_data->read.status);
break;
}
ESP_LOGI(BLE_TAG, "(battery)read char success ");
break;
case ESP_GATTC_READ_DESCR_EVT:
ESP_LOGI(BLE_TAG, "(battery)ESP_GATTC_READ_DESCR_EVT");
if (p_data->read.status != ESP_GATT_OK){
ESP_LOGE(BLE_TAG, "(battery)read descr failed, error status = %x", p_data->write.status);
break;
}
ESP_LOGI(BLE_TAG, "(battery)read descr success ");
esp_gatt_status_t ret_status = esp_ble_gattc_read_char( gattc_if,
gl_profile_tab[PROFILE_BATTERY_SERVICE].conn_id,
gl_profile_tab[PROFILE_BATTERY_SERVICE].char_handle,
ESP_GATT_AUTH_REQ_NONE);
if(ret_status){
ESP_LOGE(BLE_TAG, "(battery) esp_ble_gattc_read_char failed, error code = %x", ret_status);
}else{
ESP_LOGI(BLE_TAG, "(battery) esp_ble_gattc_read_char success ");
}
break;
case ESP_GATTC_WRITE_DESCR_EVT:
ESP_LOGI(BLE_TAG, "(battery)ESP_GATTC_WRITE_DESCR_EVT");
// if (p_data->write.status != ESP_GATT_OK){
// ESP_LOGE(BLE_TAG, "(battery)write descr failed, error status = %x", p_data->write.status);
// break;
// }
// ESP_LOGI(BLE_TAG, "(battery)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_BATTERY_SERVICE].conn_id,
// gl_profile_tab[PROFILE_BATTERY_SERVICE].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(BLE_TAG, "(battery)ESP_GATTC_SRVC_CHG_EVT, bd_addr:");
esp_log_buffer_hex(BLE_TAG, bda, sizeof(esp_bd_addr_t));
break;
}
case ESP_GATTC_WRITE_CHAR_EVT:
if (p_data->write.status != ESP_GATT_OK){
ESP_LOGE(BLE_TAG, "(battery)write char failed, error status = %x", p_data->write.status);
break;
}
ESP_LOGI(BLE_TAG, "(battery)write char success ");
break;
case ESP_GATTC_DISCONNECT_EVT:
connect_ble = false;
get_server = false;
ESP_LOGI(BLE_TAG, "(battery)ESP_GATTC_DISCONNECT_EVT, reason = %d", p_data->disconnect.reason);
break;
default:
ESP_LOGI(BLE_TAG, "unregistered EVT:%d", event);
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(BLE_TAG, "scan start failed, error status = %x", param->scan_start_cmpl.status);
break;
}
ESP_LOGI(BLE_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(BLE_TAG, scan_result->scan_rst.bda, 6);
ESP_LOGI(BLE_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(BLE_TAG, "searched Device Name Len %d", adv_name_len);
esp_log_buffer_char(BLE_TAG, adv_name, adv_name_len);
ESP_LOGI(BLE_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(BLE_TAG, "searched device %s\n", remote_device_name);
if (connect_ble == false) {
connect_ble = true;
ESP_LOGI(BLE_TAG, "connect to the remote device.");
esp_ble_gap_stop_scanning();
esp_ble_gattc_open(gl_profile_tab[PROFILE_BATTERY_SERVICE].gattc_if, scan_result->scan_rst.bda, true);
//esp_ble_gattc_open(gl_profile_tab[PROFILE_DEVICE_INFO].gattc_if, scan_result->scan_rst.bda, true);
//esp_ble_gattc_open(gl_profile_tab[PROFILE_HRM].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(BLE_TAG, "scan stop failed, error status = %x", param->scan_stop_cmpl.status);
break;
}
ESP_LOGI(BLE_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(BLE_TAG, "adv stop failed, error status = %x", param->adv_stop_cmpl.status);
break;
}
ESP_LOGI(BLE_TAG, "stop adv successfully");
break;
case ESP_GAP_BLE_UPDATE_CONN_PARAMS_EVT:
ESP_LOGI(BLE_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(BLE_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_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 );
// BLE
{
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(BLE_TAG, "%s initialize controller failed, error code = %x\n", __func__, ret);
return;
}
ret = esp_bt_controller_enable(ESP_BT_MODE_BLE);
if (ret) {
ESP_LOGE(BLE_TAG, "%s enable controller failed, error code = %x\n", __func__, ret);
return;
}
ret = esp_bluedroid_init();
if (ret) {
ESP_LOGE(BLE_TAG, "%s init bluetooth failed, error code = %x\n", __func__, ret);
return;
}
ret = esp_bluedroid_enable();
if (ret) {
ESP_LOGE(BLE_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(BLE_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(BLE_TAG, "%s gattc register failed, error code = %x\n", __func__, ret);
return;
}
ret = esp_ble_gattc_app_register(PROFILE_BATTERY_SERVICE);
if (ret){
ESP_LOGE(BLE_TAG, "%s gattc app register failed, error code = %x\n", __func__, ret);
}
// ret = esp_ble_gattc_app_register(PROFILE_DEVICE_INFO);
// if (ret){
// ESP_LOGE(BLE_TAG, "%s gattc app register failed, error code = %x\n", __func__, ret);
// }
// ret = esp_ble_gattc_app_register(PROFILE_HRM);
// if (ret){
// ESP_LOGE(BLE_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(BLE_TAG, "set local MTU failed, error code = %x", local_mtu_ret);
}
}
}
https://pastebin.com/k6Wm2tLM