Sometimes the device name cannot be obtained through Bluetooth scanning (IDFGH-10203)

[jjj19950710]

Answers checklist.

• [X] I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• [X] I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• [X] I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

Development Kit: ESP32 IDF version: v5.0.1 example: esp_hid_host esp_hid_device

When I turn off ble Bluetooth, the device name cannot be obtained from the scan results when running esp_hid_host.Can I find the corresponding device name through the scanned MAC address？

[esp-zhp]

Can you provide a more detailed description of the problem? And how can I reproduce this issue?

[jjj19950710]

esp_hid_host example turn off ble Bluetooth,other unchanged.and run esp_hid_host and esp_hid_device,esp_hid_host run code snippets during scanning:

void hid_demo_task(void *pvParameters)
{
    size_t results_len = 0;
    esp_hid_scan_result_t *results = NULL;
    ESP_LOGI(TAG, "SCAN...");
    //start scan for HID devices
    esp_hid_scan(SCAN_DURATION_SECONDS, &results_len, &results);
    ESP_LOGI(TAG, "SCAN: %u results", results_len);
    if (results_len) {
        esp_hid_scan_result_t *r = results;
        esp_hid_scan_result_t *cr = NULL;
        while (r) {
            printf("  %s: " ESP_BD_ADDR_STR ", ", (r->transport == ESP_HID_TRANSPORT_BLE) ? "BLE" : "BT ", ESP_BD_ADDR_HEX(r->bda));
            printf("RSSI: %d, ", r->rssi);
            printf("USAGE: %s, ", esp_hid_usage_str(r->usage));
#if CONFIG_BT_BLE_ENABLED
            if (r->transport == ESP_HID_TRANSPORT_BLE) {
                cr = r;
                printf("APPEARANCE: 0x%04x, ", r->ble.appearance);
                printf("ADDR_TYPE: '%s', ", ble_addr_type_str(r->ble.addr_type));
            }
#endif /* CONFIG_BT_BLE_ENABLED */
#if CONFIG_BT_HID_HOST_ENABLED
            if (r->transport == ESP_HID_TRANSPORT_BT) {
                cr = r;
                printf("COD: %s[", esp_hid_cod_major_str(r->bt.cod.major));
                esp_hid_cod_minor_print(r->bt.cod.minor, stdout);
                printf("] srv 0x%03x, ", r->bt.cod.service);
                print_uuid(&r->bt.uuid);
                printf(", ");
            }
#endif /* CONFIG_BT_HID_HOST_ENABLED */
            printf("NAME: %s ", r->name ? r->name : "");  //device name is NULL
            printf("\n");
            r = r->next;
        }
        if (cr) {
            //open the last result
            esp_hidh_dev_open(cr->bda, cr->transport, cr->ble.addr_type);
        }
        //free the results
        esp_hid_scan_results_free(results);
    }
    vTaskDelete(NULL);
}

The scanned bt bluetooth device name is empty.

 printf("NAME: %s ", r->name ? r->name : ""); 

[esp-cjh]

@jjj19950710 , are you using classic bluetooth?

[jjj19950710]

Yes，I used classic bluetooth