I have a wiz850io revision 1.0 connected to a raspberry pi zero, the spi clock is running at 33MHz. I’m using the driver that comes with the buster image. The interface between the pi and wiz850io boards is a wire wrapped interface board with connectors and the shortest possible wires (longest one is about 1/2 inch). The maximum iperf3 bandwidth is 9Mbit/s. Is this bandwidth all I should expect or should it be higher. I was hoping for at least 15Mbit/s. Is there anything that could be done to increase the bandwidth?
Thanks for any help.
