Classic Bluetooth Pair and Bond reconnection issue

grginho
Posts: 2
Joined: Tue Nov 29, 2022 12:54 pm

Classic Bluetooth Pair and Bond reconnection issue

Postby grginho » Tue Nov 29, 2022 1:44 pm

Hello,

I'm making a custom application based on the: ESP-IDF BT/BLE HID Device Demo (located in the /esp-idf/examples/bluetooth/esp_hid_device folder).

I (470) cpu_start: cpu freq: 160000000
I (470) cpu_start: Application information:
I (474) cpu_start: Project name: esp_hid_device
I (480) cpu_start: App version: v4.4.1
I (485) cpu_start: Compile time: Nov 29 2022 13:29:06
I (491) cpu_start: ELF file SHA256: e4034cbed8863142...
I (497) cpu_start: ESP-IDF: v4.4.1

I can successfully pair the device with both Windows and Linux OS. But after resetting the device, it won't reconnect to the Windows PC again, and I need to forget it and start the pairing process from the beginning. On the Linux OS, it gets reconnected after some time.

I've used esp_bt_gap_get_bond_device_num() and esp_bt_gap_get_bond_device_list(...) functions to get saved bond devices and got a response with the MAC address of the bonded device. So, even though the PC USB Dongle is among the bonded devices list it isn't reconnecting automatically to Windows after a reset.
Is there something I forgot to enable, to be able to start the reconnection process when devices are in the range?

Thank you in advance,

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