Any drawback if use external 32.768kHz xtal for BLE light sleep

[shermanlee]

Hi, Im working on a project using ESP32s3 for a HID USB device
As the power consumption and temp of the chip is bit higher then requirement
So I use external 32.768kHz xtal for BLE light sleep followed by this guide
https://github.com/espressif/esp-idf/is ... -500312453
which work fine, the temp does drop.

But a weird situation is that some some of the samples BLE not work normally and return error state 133

I want to ask if using 32.768kHz for BLE will cause any drawback?
or anything needed to be taken extra care?

Thank you for the help!

[shermanlee]

Some update:

1. Some sample just keep reset itself
2. Some of them could be connected with BLE, but disconnected after a few sec with reason 0x08 (connection timeout)
3. There are a LED driven by IO12 will be turn on after power up, the abnormal samples will have a uneven flashing on that.

Thank for the great help!

[shermanlee]

Could anyone help?
Whats would be the possible cause (e.g. watchdog)?

Thanks for the help!