How to Combine GATTS and GATTC codes? (esp-idf BLE library) (IDFGH-1157)

[happynet95]

Hello. Recently, I am struggling with these ESPs.

The thing I want to make is : there are four devices called pods, and one device called home.

I want to make home receive datas from four pods, and calculate, and then send to my Android.

Firstly the home must receive datas from pods, so home is based oh gattc_multi_connect , and pods are based on gatts_demo.

here are my actual codes : https://github.com/happynet95/EMG-devices. look at the one at the bottom.

After then, the home must send the calculated datas to smartphone, thats the points I was struggling with, because the home must work as a client and also as a server.

At first I thought that It would work just simply copy and paste the Setups (which are provided in the void app_main()), but it didn't work.

this is my void app_main()

void app_main(){
    Setup();
    while(1){
            --- loop that sends the value ---
    }
}

and this is my void Setup()

void Setup(){
    esp_err_t 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_gattc_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();

    ret = esp_bt_controller_init(&bt_gattc_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, "gap register error, error code = %x", 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, "gattc register error, error code = %x", ret);
        return;
    }

    ret = esp_ble_gattc_app_register(PROFILE_A_APP_ID);
    if (ret){
        ESP_LOGE(GATTC_TAG, "gattc app register error, error code = %x", ret);
        return;
    }

    ret = esp_ble_gattc_app_register(PROFILE_B_APP_ID);
    if (ret){
        ESP_LOGE(GATTC_TAG, "gattc app register error, error code = %x", ret);
        return;
    }

    ret = esp_ble_gattc_app_register(PROFILE_C_APP_ID);
    if (ret){
        ESP_LOGE(GATTC_TAG, "gattc app register error, error code = %x", ret);
        return;
    }

    ret = esp_ble_gattc_app_register(PROFILE_D_APP_ID);
    if (ret){
        ESP_LOGE(GATTC_TAG, "gattc app register error, error code = %x", ret);
        return;
    }

    ret = esp_ble_gatt_set_local_mtu(200);
    if (ret){
        ESP_LOGE(GATTC_TAG, "set local  MTU failed, error code = %x", ret);
    }

    // GATTC_DEMO Setup

    // 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));

    ret = esp_bt_controller_init(&bt_gattc_cfg);
    if (ret) {
        ESP_LOGE(GATTS_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(GATTS_TAG, "%s enable controller failed: %s\n", __func__, esp_err_to_name(ret));
        return;
    }
    ret = esp_bluedroid_init();
    if (ret) {
        ESP_LOGE(GATTS_TAG, "%s init bluetooth failed: %s\n", __func__, esp_err_to_name(ret));
        return;
    }
    ret = esp_bluedroid_enable();
    if (ret) {
        ESP_LOGE(GATTS_TAG, "%s enable bluetooth failed: %s\n", __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_server);
    if (ret){
        ESP_LOGE(GATTS_TAG, "gap register error, error code = %x", ret);
        return;
    }
    ret = esp_ble_gatts_app_register(PROFILE_A_APP_ID_server);
    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_server);
    if (ret){
        ESP_LOGE(GATTS_TAG, "gatts app register error, error code = %x", ret);
        return;
    }
    esp_err_t local_mtu_ret_server = esp_ble_gatt_set_local_mtu(500);
    if (local_mtu_ret_server){
        ESP_LOGE(GATTS_TAG, "set local  MTU failed, error code = %x", local_mtu_ret_server);
        return;
    }
    // GATTS_DEMO Setup;
}

This is just a simple combination of two setups of each example, gattc_multi_connect and gatts_demo but this doesn't work.

To put it in detail, It successes its connection with 4 pods (and print the received values) , but fails to advertise the new data.

It also calls the watchdog trigger :

E (1170631) task_wdt: Task watchdog got triggered. The following tasks did not reset the watchdog in time:
E (1170631) task_wdt:  - IDLE0 (CPU 0)
E (1170631) task_wdt: Tasks currently running:
E (1170631) task_wdt: CPU 0: main
E (1170631) task_wdt: CPU 1: IDLE1

Does somebody know about this?

[happynet95]

Never mind guys ! I've solved this one! Although I dont know how I did it....

[Weijian-Espressif]

@happynet95,

• please modify controller and bluedroid BLE max connections in menuconfig.
• please create a task instead of while(1), please refer to ble spp server example.

[Alvin1Zhang]

@happynet95 Hi, thanks for reporting the issue. Do you have some time to try the methods recommended by @Weijian-Espressif ? Would you help share if any updates? Thanks.

[Alvin1Zhang]

@happynet95 Feel free to reopen if the issue still happens. Thanks.