[libusb] Loosing connection to USB devices.

[Jaco <ja...@jd...>]

Hi all. 

 

I am not sure if this is a libusb issue. I do not think so. I just want to
ask a question as I am not a USB guru.

I have been using libusb for the last 3 years to communicate with solar
inverters from the raspberry pi SBC.

All is working 100%. The issue I have is that I started to see that the new
inverters will shut down their USB port after a while.

 

So my question is this. Is there some sort of hardware handshake / flow
control like with serial to tell the USB device not to go into sleep mode?

I have not needed it up till now but we are now seeing that a lot of new
devices will go into "sleep" mode. Unplugging the USB device does not help.

So I am not sure if this is a hardware issue to address with the inverter
manufacturer or what is going on.

 

Kind Regards.