ESP32_DevKitc_V4 demo板做蓝牙主机扫描不到任何设备是怎么回事？

前置条件：

使用ESP32_DevKitc_V4demo板 + examplesbluetoothesp_hid_host用例，蓝牙模式设置为：ESP_BT_MODE_BTDM条件下

问题：

无法收索到任何蓝牙设备，而此时用手机是可以收索到蓝牙其他设备的

打印日志如下：

I (613) BTDM_INIT: BT controller compile version [1342a48]

I (623) system_api: Base MAC address is not set

I (623) system_api: read default base MAC address from EFUSE

E (633) system_api: MAC:7c-87-ce-d0-b5-88

E (633) system_api: ESP_MAC_BT type

E (643) system_api: MAC:7c-87-ce-d0-b5-8a

I (653) phy_init: phy_version 4670,719f9f6,Feb 18 2021,17:07:07

I (653) phy_init: phy_version esp_phy_load_cal_and_init:565

I (663) phy_init: phy_version esp_phy_load_cal_and_init:581

I (663) phy_init: phy_version esp_phy_load_cal_and_init:596

I (673) phy_init: phy_version esp_phy_load_cal_and_init:598

I (783) phy_init: phy_version esp_phy_load_cal_and_init:629

E (1373) ESP_HID_GAP: init_bt_gap

E (1383) ESP_HID_GAP: init_ble_gap

W (1383) BT_LOG: esp_ble_gattc_register_callback

E (1383) ESP_HIDH: esp_hidh_init into

E (1393) BLE_HIDH: esp_hidh_gattc_event_handler, event 0x0

E (1393) ESP_HIDH: esp_hidh_init end, ret:0

I (1393) ESP_HIDH_DEMO: SCAN...

E (1403) ESP_HID_GAP: esp_hid_scan0

E (6423) ESP_HID_GAP: esp_hid_scan: bt_ret:0, ble_ret:0

I (6423) ESP_HIDH_DEMO: SCAN: 0 results