serial port - Raspberry Pi-4; pl2303_read_int_callback - usb_submit_urb failed with result -1

Question

I am trying to control 5V 4-Ch Relay Module http://www.icstation.com/icstation-micro-channel-relay-module-control-relay-module-icse012a-p-4012.html using Raspberry Pi-4, Model-B, 2GB RAM.

But sometimes I am observing "pl2303 ttyUSB0: pl2303_read_int_callback - usb_submit_urb failed with result -1" error and the Relay did not perform the required operation.

It would be good to know the root cause or the reason for this issue from the professional present here on this forum. Any hint/clue would be really helpful and appreciated :) .

Thanks Again.

Answer 1

等待大神答复