"usb_cdc_acm: Ring buffer full, drain buffer" repeats on boot

[ZacMid007]

I'm developing code for the xiao_ble board in nRF Connect using Visual Studio, currently working with the ble light_switch example. I'm using the logger module rather than eg printk() as for whatever reason printk() doesn't come through the USB connector (not the point of this question). However, every time I boot the board, I see the following:

The number of messages dropped ranges anywhere from 10 to over 100. I observed these before I enabled the logger module, ie they were already present before I modified any code in the example. I added the following lines to my proj.conf, but this didn't fix anything:

Is there a simple fix? Regular logging works fine after all the "Ring buffer full" messages have finished.

[ZacMid007]

Other log messages do indeed appear once the port is open, I'm just confused as to why so many strings seem to be attempted to print at boot, as I am not logging anything and cannot see where in the code that volume of messages could be coming from

[Håkon Alseth]

Hi,

 

It highly depends on which modules are enabled in your firmware, and the level of the logger module.

Informational logs can fill up the log queue quite quickly, especially when the backend isn't yet ready.

 

Kind regards,

Håkon